envoy部分五：envoy的动态配置
一、envoy动态配置介绍
{ "lds_config": "{...}", "cds_config": "{...}", "ads_config": "{...}" }
xDS API为Envoy提供了资源的动态配置机制，它也被称为Data Plane API。
1)基于文件系统发现：指定要监视的文件系统路径 2)通过查询一到多个管理服务器（Management Server）发现：通过DiscoveryRequest协议报文发送请求，并要求服务方以DiscoveryResponse协议报文进行响应 (1)gRPC服务：启动gRPC流 (2)REST服务：轮询REST-JSON URL
v3 xDS支持如下几种资源类型
envoy.config.listener.v3.Listener
envoy.config.route.v3.RouteConfiguration
envoy.config.route.v3.ScopedRouteConfiguration
envoy.config.route.v3.VirtualHost
envoy.config.cluster.v3.Cluster
envoy.config.endpoint.v3.ClusterLoadAssignment
envoy.extensions.transport_sockets.tls.v3.Secret
envoy.service.runtime.v3. Runtime
二、DS API介绍
1)所有这些API都提供了最终的一致性，并且彼此间不存在相互影响； 2)部分更高级别的操作（例如执行服务的A/B部署）需要进行排序以防止流量被丢弃，因此，基于一个管理服务器提供多类API时还需要使用聚合发现服务（ADS ）API。 ADS API允许所有其他API通过来自单个管理服务器的单个gRPC双向流进行编组，从而允许对操作进行确定性排序
xDS的各API还支持增量传输机制，包括ADS
一个Management Server 实例可能需要同时响应多个不同的Envoy实例的资源发现请求。
1)Management Server上的配置需要为适配到不同的Envoy实例 2)Envoy 实例请求发现配置时，需要在请求报文中上报自身的信息 (1)例如id、cluster、metadata和locality等 (2)这些配置信息定义在Bootstrap配置文件中
专用的顶级配置段“node{…}”中配置
node: id: … # An opaque node identifier for the Envoy node. cluster: … # Defines the local service cluster name where Envoy is running. metadata: {…} # Opaque metadata extending the node identifier. Envoy will pass this directly to the management server . locality: # Locality specifying where the Envoy instance is running. region: … zone: … sub_zone: … user_agent_name: … # Free-form string that identifies the entity requesting config. E.g . “envoy ” or “grpc” user_agent_version: … # Free-form string that identifies the version of the entity requesting config. E.g . “1.12.2” or “abcd1234” , or “SpecialEnvoyBuild ” user_agent_build_version: # Structured version of the entity requesting config. version: … metadata: {…} extensions: [ ] # List of extensions and their versions supported by the node. client_features: [ ] listening_addresses: [ ] # Known listening ports on the node as a generic hint to the management server for filtering listeners to be returned
四、API的流程
1、对于典型的HTTP路由方案，xDS API的Management Server 需要为其客户端（Envoy实例）配 置的核心资源类型为Listener、RouteConfiguration、Cluster和ClusterLoadAssignment四个。每个Listener资源可以指向一个RouteConfiguration资源，该资源可以指向一个或多个Cluster资源，并且每个Cluster资源可以指向一个ClusterLoadAssignment资源。
3、类型gRPC一类的非代理式客户端可以仅在启动时请求加载其感兴趣的Listener资源， 而后再加载这些特定Listener相关的RouteConfiguration资源；再然后，是这些 RouteConfiguration资源指向的Cluster资源，以及由这些Cluster资源依赖的 ClusterLoadAssignment资源；该种场景中，Listener资源是客户端整个配置树的“根”。
五、Envoy的配置方式
Envoy的架构支持非常灵活的配置方式：简单部署场景可以使用纯静态配置，而更复 杂的部署场景则可以逐步添加需要的动态配置机制
1、纯静态配置：用户自行提供侦听器、过滤器链、集 群及HTTP路由（http代理场景），上 游端点的 发 现仅可通过DNS服务进行，且配置的重新加载必须通过内置的热 重启（ hot restart）完成； 2、仅使用EDS：EDS提供的端点发现功能可有效规避DNS的限制（ 响应中的 最大记录 数等）； 3、使用EDS和CDS：CDS能够让Envoy以优雅的方式添加、更新和删除 上游集群 ，于是， 初始配置 时， Envoy无须事先了解所有上游集群； 4、EDS、CDS和RDS：动态发现路由配置；RDS与EDS、CDS一起使用时 ，为用户 提供了构 建复杂路 由 拓扑的能力（流量转移、蓝/绿部署等）； 5、EDS、CDS、RDS和LDS：动态发现侦听器配置，包括内嵌的过滤 器链；启 用此四种 发现服务 后，除 了较罕见的配置变动、证书轮替或更新Envoy程序之外，几 乎无须再 热重启Envoy； 6、EDS、CDS、RDS、LDS和SDS：动态发现侦听器密钥相关的证书、 私钥及TLS会 话票据， 以及对证 书 验证逻辑的配置（受信任的根证书和撤销机制等 ）；
1、配置源（ConfigSource）用于指定资源配置数据的来源，用于为Listener、Cluster、Route、 Endpoint、Secret和VirtualHost等资源提供配置数据。
2、目前，Envoy支持的资源配置源只能是path、api_config_source或ads其中之一。
3、api_config_source或ads的数据来自于xDS API Server，即Management Server。
七、基于文件系统的订阅
1)Envoy将使用inotify（Mac OS X上的kqueue）来监视文件的更改，并在更新时解析文件中的DiscoveryResponse 报文 2)二进制protobufs，JSON，YAML和proto文本都是DiscoveryResponse 所支持的数据格式 提示 1)除了统计计数器和日志以外，没有任何机制可用于文件系统订阅ACK/NACK更新 2)若配置更新被拒绝，xDS API的最后一个有效配置将继续适用
以EDS为例，Cluster为静态定义，其各Endpoint通过EDS动态发现
集群定义格式
# Cluster中的endpoint配置格式 clusters: - name: ... eds_cluster_config: service_name: eds_config: path: ... # ConfigSource，支持使用path, api_config_source或ads三者之一；
cluster的配置
# 类似如下纯静态格式的Cluster定义 clusters: - name: webcluster connect_timeout: 0.25s type: STATIC #类型为静态 lb_policy: ROUND_ROBIN load_assignment: cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: 172.31.11.11 port_value: 8080 #使用了EDS的配置 clusters: - name: targetCluster connect_timeout: 0.25s lb_policy: ROUND_ROBIN type: EDS #类型为EDS eds_cluster_config: service_name: webcluster eds_config: path: '/etc/envoy/eds.yaml' # 指定订阅的文件路径 #提示：文件后缀名为conf，则资源要以json格式定义；文件后缀名为yaml，则资源需要以yaml格式定义；另外，动态配置中，各Envoy实例需要有惟的id标识；
1)文件/etc/envoy/eds.yaml中以Discovery Response报文的格式给出响应实例，例如，下面的 配置示例用于存在地址172.31.11.11某上游服务器可提供服务时
2) 响应报文需要以JSON格式给出
resources: - "@type": type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: 172.31.11.11 port_value: 8080
随后，修改该文件，将172.31.11.12也添加进后端端点列表中，模拟配置变动
- endpoint: address: socket_address: address: 172.31.11.12 port_value: 8080
2、基于lds和cds实现Envoy基本全动态的配置方式
1)各Listener的定义以Discovery Response 的标准格式保存于一个文件中。
2) 各Cluster的定义同样以Discovery Response的标准格式保存于另一文件中。
如下面Envoy Bootstrap配置文件示例中的文件引用
node: id: envoy_front_proxy cluster: MageEdu_Cluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 dynamic_resources: lds_config: path: /etc/envoy/conf.d/lds.yaml cds_config: path: /etc/envoy/conf.d/cds.yaml
lds的Discovery Response格式的配置示例如下
resources: - "@type": type.googleapis.com/envoy.config.listener.v3.Listener name: listener_http address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: name: envoy.http_connection_manager typed_config: "@type":type.googleapis.com/envoy.extensions.filters.network.http_connection_manag er.v3.HttpConnectionManager stat_prefix: ingress_http route_config: name: local_route virtual_hosts: - name: local_service domains: ["*"] routes: - match: prefix: "/" route: cluster: webcluster http_filters: - name: envoy.filters.http.router
cds的Discovery Response格式的配置示例如下
resources: - "@type": type.googleapis.com/envoy.config.cluster.v3.Cluster name: webcluster connect_timeout: 1s type: STRICT_DNS load_assignment: cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: webserver01 port_value: 8080 - endpoint: address: socket_address: address: webserver02 port_value: 8080
1、gRPC的介绍
1)、Enovy支持为每个xDS API独立指定gRPC ApiConfigSource，它指向与管理服务器对应的某 上游集群。
(1)这将为每个xDS资源类型启动一个独立的双向gRPC流，可能会发送给不同的管理服务器 (2)每个流都有自己独立维护的 资源版本，且不存在跨资源类型的共享版本机制； (3)在不使用ADS的情况下，每个资源类型可能具有不同的版本，因为Envoy API允许指向不同的 EDS/RDS资源配置并对应不同的ConfigSources
2、基于gRPC的动态配置格式
以LDS为例，它配置Listener以动态方式发现和加载，而内部的路由可由发现的Listener直接 提供，也可配置再经由RDS发现。
下面为LDS配置格式，CDS等的配置格式类同：
dynamic_resouces: lds_config: api_config_source： api_type: ... # API 可经由REST或gRPC获取，支持的类型包括REST、gRPC和delta_gRPC resource_api_version: ... # xDS 资源的API版本，对于1.19及之后的Envoy版本，要使用v3； rate_limit_settings： {...} # 速率限制 grpc_services: # 提供grpc服务的一到多个服务源 transport_api_version : ... # xDS 传输协议使用的API版本，对于1.19及之后的Envoy版本，要使用v3； envoy_grpc: # Envoy内建的grpc客户端，envoy_grpc和google_grpc二者仅能用其一； cluster_name: ... # grpc集群的名称； google_grpc: # Google的C++ grpc客户端 timeout: ... # grpc超时时长； 注意： 提供gRPC API服务的Management Server （控制平面）也需要定义为Envoy上的集群， 并由envoy实例通过xDS API进行请求； (1)通常，这些管理服务器需要以静态资源的格式提供； (2)类似于，DHCP协议的Server 端的地址必须静态配置，而不能经由DHCP协议获取；
3、基于GRPC管理服务器订阅
下面的示例配置使用了lds和cds 分别动态获取Listener和Cluster相关的配置。
node: id: envoy_front_proxy cluster: webcluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 dynamic_resources: lds_config: #定义动态获取listener resource_api_version: V3 api_config_source: api_type: GRPC #使用GRPC模式 transport_api_version: V3 grpc_services: - envoy_grpc: cluster_name: xds_cluster #调用grpc服务器 cds_config: #定义动态获取cluster resource_api_version: V3 api_config_source: api_type: GRPC #使用GRPC模式 transport_api_version: V3 grpc_services: - envoy_grpc: cluster_name: xds_cluster #调用grpc服务器 #xds_cluster需要静态配置 static_resources: clusters: - name: xds_cluster connect_timeout: 0.25s type: STRICT_DNS # Used to provide extension-specific protocol options for upstream connections. typed_extension_protocol_options: envoy.extensions.upstreams.http.v3.HttpProtocolOptions: "@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions explicit_http_config: http2_protocol_options: {} lb_policy: ROUND_ROBIN load_assignment: cluster_name: xds_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: xdsserver-IP port_value: 18000
通过上面的交互顺序保证MS资源分发时的流量丢弃是一项很有挑战的工作，而ADS允许单 一MS通过单个gRPC流提供所有的API更新。
1)配合仔细规划的更新顺序，ADS可规避更新过程中流量丢失 2)使用 ADS，在单个流上可通过类型 URL 来进行复用多个独立的 DiscoveryRequest/DiscoveryResponse 序列
使用了ads分别动态获取Listener和Cluster相关的配置
node: id: envoy_front_proxy cluster: webcluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 dynamic_resources: ads_config: api_type: GRPC transport_api_version: V3 grpc_services: - envoy_grpc: cluster_name: xds_cluster set_node_on_first_message_only: true cds_config: resource_api_version: V3 ads: {} lds_config: resource_api_version: V3 ads: {} #xds_cluster需要静态配置 static_resources: clusters: - name: xds_cluster connect_timeout: 0.25s type: STRICT_DNS # Used to provide extension-specific protocol options for upstream connections. typed_extension_protocol_options: envoy.extensions.upstreams.http.v3.HttpProtocolOptions: "@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions explicit_http_config: http2_protocol_options: {} lb_policy: ROUND_ROBIN load_assignment: cluster_name: xds_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: xdsserver-IP port_value: 18000
九、REST-JSON轮询订阅
1、REST-JSON介绍
2）、上面的消息顺序是类似的，除了没有维护到管理服务器的持久流
3）、预计在任何时间点只有一个未完成的请求，因此响应nonce在REST-JSON中是可选的 p proto3的JSON规范转换用于编码DiscoveryRequest和DiscoveryResponse消息。
4）、ADS不适用于REST-JSON轮询
5）、当轮询周期设置为较小的值时，为了进行长轮询，则还需要避免发送DiscoveryResponse ，除 非发生了对底层资源的更改
2、以LDS为例，它用于发现并配置Listener
基于REST订阅的LDS配置格式，CDS等其它配置类似
dynamic_resources:
lds_config:
resource_api_version: … # xDS 资源配置遵循的API版本，v1.19版本及以后仅支持V3 ；
api_config_source：
transport_api_version: ... # xDS 传输协议中使用API版本，v1.19版本及以后仅支持V3；
api_type: ... # API 可经由REST或gRPC获取，支持的类型包括REST、GRPC和DELTA_GRPC
cluster_names: ... # 提供服务的集群名称列表，仅能与REST类型的API一起使用；多个集群用于冗余之目的，故障时将循环访问；
refresh_delay: ... # REST API 轮询时间间隔；
request_timeout: ... # REST API请求超时时长，默认为1s；
3、基于REST管理服务器订阅
使用了ads分别动态获取Listener和Cluster相关的配置
node: id: envoy_front_proxy cluster: webcluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 dynamic_resources: cds_config: resource_api_version: V3 api_config_source: api_type: REST transport_api_version: V3 refresh_delay: {nanos: 500000000} # 1/2s cluster_names: - xds_cluster lds_config: resource_api_version: V3 api_config_source: api_type: REST transport_api_version: V3 refresh_delay: {nanos: 500000000} # 1/2s cluster_names: - xds_cluster
十、实验案例
实验环境
三个Service: envoy：Front Proxy,地址由docker-compose动态分配 webserver01：第一个后端服务,地址由docker-compose动态分配，且将webserver01解析到该地址 webserver02：第二个后端服务,地址由docker-compose动态分配，且将webserver02解析到该地址
envoy.yaml
admin: access_log_path: "/dev/null" address: socket_address: address: 0.0.0.0 port_value: 9901 static_resources: listeners: - name: listener_0 address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http codec_type: AUTO route_config: name: local_route virtual_hosts: - name: web_service_1 domains: ["*"] routes: - match: { prefix: "/" } route: { cluster: local_cluster } http_filters: - name: envoy.filters.http.router clusters: - name: local_cluster connect_timeout: 0.25s type: STRICT_DNS dns_lookup_family: V4_ONLY lb_policy: ROUND_ROBIN load_assignment: cluster_name: local_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: { address: webserver01, port_value: 8080 } - endpoint: address: socket_address: { address: webserver02, port_value: 8080 }
docker-compose.yaml
version: '3.3' services: envoy: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./envoy.yaml:/etc/envoy/envoy.yaml networks: envoymesh: aliases: - front-proxy depends_on: - webserver01 - webserver02 webserver01: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 hostname: webserver01 networks: envoymesh: aliases: - webserver01 webserver02: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 hostname: webserver02 networks: envoymesh: aliases: - webserver02 networks: envoymesh: driver: bridge ipam: config: - subnet: 172.31.10.0/24
实验验证
docker-compose up
克隆窗口来验证
root@test:~# front_proxy_ip=$(docker container inspect --format '{{ $network := index .NetworkSettings.Networks "cluster-static-dns-discovery_envoymesh" }}{{ $network.IPAddress}}' cluster-static-dns-discovery_envoy_1) root@test:~# echo $front_proxy_ip 172.31.10.4 root@test:~# curl $front_proxy_ip iKubernetes demoapp v1.0 !! ClientIP: 172.31.10.4, ServerName: webserver01, ServerIP: 172.31.10.2! root@test:~# curl $front_proxy_ip iKubernetes demoapp v1.0 !! ClientIP: 172.31.10.4, ServerName: webserver02, ServerIP: 172.31.10.3! #可以通过admin interface了解集群的相关状态，尤其是获取的各endpoint的相关信息 root@test:~# curl http://${front_proxy_ip}:9901/clusters local_cluster::observability_name::local_cluster local_cluster::default_priority::max_connections::1024 local_cluster::default_priority::max_pending_requests::1024 local_cluster::default_priority::max_requests::1024 local_cluster::default_priority::max_retries::3 local_cluster::high_priority::max_connections::1024 local_cluster::high_priority::max_pending_requests::1024 local_cluster::high_priority::max_requests::1024 local_cluster::high_priority::max_retries::3 local_cluster::added_via_api::false local_cluster::172.31.10.2:8080::cx_active::0 local_cluster::172.31.10.2:8080::cx_connect_fail::0 local_cluster::172.31.10.2:8080::cx_total::2 local_cluster::172.31.10.2:8080::rq_active::0 local_cluster::172.31.10.2:8080::rq_error::0 local_cluster::172.31.10.2:8080::rq_success::2 local_cluster::172.31.10.2:8080::rq_timeout::0 local_cluster::172.31.10.2:8080::rq_total::2 local_cluster::172.31.10.2:8080::hostname::webserver01 local_cluster::172.31.10.2:8080::health_flags::healthy local_cluster::172.31.10.2:8080::weight::1 local_cluster::172.31.10.2:8080::region:: local_cluster::172.31.10.2:8080::zone:: local_cluster::172.31.10.2:8080::sub_zone:: local_cluster::172.31.10.2:8080::canary::false local_cluster::172.31.10.2:8080::priority::0 local_cluster::172.31.10.2:8080::success_rate::-1.0 local_cluster::172.31.10.2:8080::local_origin_success_rate::-1.0 local_cluster::172.31.10.3:8080::cx_active::0 local_cluster::172.31.10.3:8080::cx_connect_fail::0 local_cluster::172.31.10.3:8080::cx_total::3 local_cluster::172.31.10.3:8080::rq_active::0 local_cluster::172.31.10.3:8080::rq_error::0 local_cluster::172.31.10.3:8080::rq_success::3 local_cluster::172.31.10.3:8080::rq_timeout::0 local_cluster::172.31.10.3:8080::rq_total::3 local_cluster::172.31.10.3:8080::hostname::webserver02 local_cluster::172.31.10.3:8080::health_flags::healthy local_cluster::172.31.10.3:8080::weight::1 local_cluster::172.31.10.3:8080::region:: local_cluster::172.31.10.3:8080::zone:: local_cluster::172.31.10.3:8080::sub_zone:: local_cluster::172.31.10.3:8080::canary::false local_cluster::172.31.10.3:8080::priority::0 local_cluster::172.31.10.3:8080::success_rate::-1.0 local_cluster::172.31.10.3:8080::local_origin_success_rate::-1.0
2、eds-filesystem
五个Service: envoy：Front Proxy,地址为172.31.11.2 webserver01：第一个后端服务 webserver01-sidecar：第一个后端服务的Sidecar Proxy,地址为172.31.11.11 webserver02：第二个后端服务 webserver02-sidecar：第二个后端服务的Sidecar Proxy,地址为172.31.11.12
front-envoy.yaml
node: id: envoy_front_proxy cluster: MageEdu_Cluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 static_resources: listeners: - name: listener_0 address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http codec_type: AUTO route_config: name: local_route virtual_hosts: - name: web_service_01 domains: ["*"] routes: - match: { prefix: "/" } route: { cluster: webcluster } http_filters: - name: envoy.filters.http.router clusters: - name: webcluster connect_timeout: 0.25s type: EDS lb_policy: ROUND_ROBIN eds_cluster_config: service_name: webcluster eds_config: path: '/etc/envoy/eds.conf.d/eds.yaml'
envoy-sidecar-proxy.yaml
admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 static_resources: listeners: - name: listener_0 address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http codec_type: AUTO route_config: name: local_route virtual_hosts: - name: local_service domains: ["*"] routes: - match: { prefix: "/" } route: { cluster: local_cluster } http_filters: - name: envoy.filters.http.router clusters: - name: local_cluster connect_timeout: 0.25s type: STATIC lb_policy: ROUND_ROBIN load_assignment: cluster_name: local_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: { address: 127.0.0.1, port_value: 8080 }
eds.yaml
resources: - "@type": type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: 172.31.11.11 port_value: 8080
eds.yaml.v1
resources: - "@type": type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: 172.31.11.11 port_value: 8080
eds.yaml.v2
version_info: '2' resources: - "@type": type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: 172.31.11.11 port_value: 8080 - endpoint: address: socket_address: address: 172.31.11.12 port_value: 8080
docker-compose.yaml
version: '3.3' services: envoy: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./front-envoy.yaml:/etc/envoy/envoy.yaml - ./eds.conf.d/:/etc/envoy/eds.conf.d/ networks: envoymesh: ipv4_address: 172.31.11.2 aliases: - front-proxy depends_on: - webserver01-sidecar - webserver02-sidecar webserver01-sidecar: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml hostname: webserver01 networks: envoymesh: ipv4_address: 172.31.11.11 aliases: - webserver01-sidecar webserver01: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 network_mode: "service:webserver01-sidecar" depends_on: - webserver01-sidecar webserver02-sidecar: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml hostname: webserver02 networks: envoymesh: ipv4_address: 172.31.11.12 aliases: - webserver02-sidecar webserver02: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 network_mode: "service:webserver02-sidecar" depends_on: - webserver02-sidecar networks: envoymesh: driver: bridge ipam: config: - subnet: 172.31.11.0/24
实验验证
docker-compose up
克隆窗口
# 查看Cluster中的Endpoint信息 root@test:~# curl 172.31.11.2:9901/clusters webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::false webcluster::172.31.11.11:8080::cx_active::0 webcluster::172.31.11.11:8080::cx_connect_fail::0 webcluster::172.31.11.11:8080::cx_total::0 webcluster::172.31.11.11:8080::rq_active::0 webcluster::172.31.11.11:8080::rq_error::0 webcluster::172.31.11.11:8080::rq_success::0 webcluster::172.31.11.11:8080::rq_timeout::0 webcluster::172.31.11.11:8080::rq_total::0 webcluster::172.31.11.11:8080::hostname:: webcluster::172.31.11.11:8080::health_flags::healthy webcluster::172.31.11.11:8080::weight::1 webcluster::172.31.11.11:8080::region:: webcluster::172.31.11.11:8080::zone:: webcluster::172.31.11.11:8080::sub_zone:: webcluster::172.31.11.11:8080::canary::false webcluster::172.31.11.11:8080::priority::0 webcluster::172.31.11.11:8080::success_rate::-1.0 webcluster::172.31.11.11:8080::local_origin_success_rate::-1.0 # 接入front proxy envoy容器的交互式接口，修改eds.conf文件中的内容，将另一个endpoint添加进文件中； root@test:~# docker exec -it eds-filesystem_envoy_1 /bin/sh / # cd /etc/envoy/eds.conf.d/ /etc/envoy/eds.conf.d # cat eds.yaml.v2 > eds.yaml # 运行下面的命令强制激活文件更改，以便基于inode监视的工作机制可被触发 /etc/envoy/eds.conf.d # mv eds.yaml temp && mv temp eds.yaml # 再次查看Cluster中的Endpoint信息 root@test:~# curl 172.31.11.2:9901/clusters webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::false webcluster::172.31.11.11:8080::cx_active::0 webcluster::172.31.11.11:8080::cx_connect_fail::0 webcluster::172.31.11.11:8080::cx_total::0 webcluster::172.31.11.11:8080::rq_active::0 webcluster::172.31.11.11:8080::rq_error::0 webcluster::172.31.11.11:8080::rq_success::0 webcluster::172.31.11.11:8080::rq_timeout::0 webcluster::172.31.11.11:8080::rq_total::0 webcluster::172.31.11.11:8080::hostname:: webcluster::172.31.11.11:8080::health_flags::healthy webcluster::172.31.11.11:8080::weight::1 webcluster::172.31.11.11:8080::region:: webcluster::172.31.11.11:8080::zone:: webcluster::172.31.11.11:8080::sub_zone:: webcluster::172.31.11.11:8080::canary::false webcluster::172.31.11.11:8080::priority::0 webcluster::172.31.11.11:8080::success_rate::-1.0 webcluster::172.31.11.11:8080::local_origin_success_rate::-1.0 webcluster::172.31.11.12:8080::cx_active::0 webcluster::172.31.11.12:8080::cx_connect_fail::0 webcluster::172.31.11.12:8080::cx_total::0 webcluster::172.31.11.12:8080::rq_active::0 webcluster::172.31.11.12:8080::rq_error::0 webcluster::172.31.11.12:8080::rq_success::0 webcluster::172.31.11.12:8080::rq_timeout::0 webcluster::172.31.11.12:8080::rq_total::0 webcluster::172.31.11.12:8080::hostname:: webcluster::172.31.11.12:8080::health_flags::healthy webcluster::172.31.11.12:8080::weight::1 webcluster::172.31.11.12:8080::region:: webcluster::172.31.11.12:8080::zone:: webcluster::172.31.11.12:8080::sub_zone:: webcluster::172.31.11.12:8080::canary::false webcluster::172.31.11.12:8080::priority::0 webcluster::172.31.11.12:8080::success_rate::-1.0 webcluster::172.31.11.12:8080::local_origin_success_rate::-1.0 #新节点172.31.11.12已经添加
3、lds-cds-filesystem
五个Service: envoy：Front Proxy,地址为172.31.12.2 webserver01：第一个后端服务 webserver01-sidecar：第一个后端服务的Sidecar Proxy,地址为172.31.12.11 webserver02：第二个后端服务 webserver02-sidecar：第二个后端服务的Sidecar Proxy,地址为172.31.12.12
front-envoy.yaml
node: id: envoy_front_proxy cluster: MageEdu_Cluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 dynamic_resources: lds_config: path: /etc/envoy/conf.d/lds.yaml cds_config: path: /etc/envoy/conf.d/cds.yaml
envoy-sidecar-proxy.yaml
admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 static_resources: listeners: - name: listener_0 address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http codec_type: AUTO route_config: name: local_route virtual_hosts: - name: local_service domains: ["*"] routes: - match: { prefix: "/" } route: { cluster: local_cluster } http_filters: - name: envoy.filters.http.router clusters: - name: local_cluster connect_timeout: 0.25s type: STATIC lb_policy: ROUND_ROBIN load_assignment: cluster_name: local_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: { address: 127.0.0.1, port_value: 8080 }
docker-compose.yaml
version: '3.3' services: envoy: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./front-envoy.yaml:/etc/envoy/envoy.yaml - ./conf.d/:/etc/envoy/conf.d/ networks: envoymesh: ipv4_address: 172.31.12.2 aliases: - front-proxy depends_on: - webserver01 - webserver01-app - webserver02 - webserver02-app webserver01: #image: envoyproxy/envoy-alpine:v1.18-latest image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml hostname: webserver01 networks: envoymesh: ipv4_address: 172.31.12.11 aliases: - webserver01-sidecar webserver01-app: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 network_mode: "service:webserver01" depends_on: - webserver01 webserver02: #image: envoyproxy/envoy-alpine:v1.18-latest image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml hostname: webserver02 networks: envoymesh: ipv4_address: 172.31.12.12 aliases: - webserver02-sidecar webserver02-app: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 network_mode: "service:webserver02" depends_on: - webserver02 networks: envoymesh: driver: bridge ipam: config: - subnet: 172.31.12.0/24
cds.yaml
resources: - "@type": type.googleapis.com/envoy.config.cluster.v3.Cluster name: webcluster connect_timeout: 1s type: STRICT_DNS load_assignment: cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: webserver01 port_value: 8080 #- endpoint: # address: # socket_address: # address: webserver02 # port_value: 8080
lds.yaml
resources: - "@type": type.googleapis.com/envoy.config.listener.v3.Listener name: listener_http address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: name: envoy.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http route_config: name: local_route virtual_hosts: - name: local_service domains: ["*"] routes: - match: prefix: "/" route: cluster: webcluster http_filters: - name: envoy.filters.http.router
实验验证
docker-compose up
克隆窗口
# 查看Cluster的信息 root@test:~# curl 172.31.12.2:9901/clusters webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::true webcluster::172.31.12.11:8080::cx_active::0 webcluster::172.31.12.11:8080::cx_connect_fail::0 webcluster::172.31.12.11:8080::cx_total::0 webcluster::172.31.12.11:8080::rq_active::0 webcluster::172.31.12.11:8080::rq_error::0 webcluster::172.31.12.11:8080::rq_success::0 webcluster::172.31.12.11:8080::rq_timeout::0 webcluster::172.31.12.11:8080::rq_total::0 webcluster::172.31.12.11:8080::hostname::webserver01 webcluster::172.31.12.11:8080::health_flags::healthy webcluster::172.31.12.11:8080::weight::1 webcluster::172.31.12.11:8080::region:: webcluster::172.31.12.11:8080::zone:: webcluster::172.31.12.11:8080::sub_zone:: webcluster::172.31.12.11:8080::canary::false webcluster::172.31.12.11:8080::priority::0 webcluster::172.31.12.11:8080::success_rate::-1.0 webcluster::172.31.12.11:8080::local_origin_success_rate::-1.0 # 查看Listener的信息 root@test:~# curl 172.31.12.2:9901/listeners listener_http::0.0.0.0:80 # 接入front proxy envoy容器的交互式接口 root@test:~# docker exec -it lds-cds-filesystem_envoy_1 /bin/sh / # cd /etc/envoy/conf.d/ # 修改cds.yaml的内容，cds.yaml中添加一个节点 /etc/envoy/conf.d # cat cds.yaml resources: - "@type": type.googleapis.com/envoy.config.cluster.v3.Cluster name: webcluster connect_timeout: 1s type: STRICT_DNS load_assignment: cluster_name: webcluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: webserver01 port_value: 8080 - endpoint: address: socket_address: address: webserver02 port_value: 8080 #运行类似下面的命令强制激活文件更改，以便基于inode监视的工作机制可被触发 /etc/envoy/conf.d # mv cds.yaml temp && mv temp cds.yaml ## 再次验证相关的配置信息 root@test:~# curl 172.31.12.2:9901/clusters webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::true webcluster::172.31.12.11:8080::cx_active::0 webcluster::172.31.12.11:8080::cx_connect_fail::0 webcluster::172.31.12.11:8080::cx_total::0 webcluster::172.31.12.11:8080::rq_active::0 webcluster::172.31.12.11:8080::rq_error::0 webcluster::172.31.12.11:8080::rq_success::0 webcluster::172.31.12.11:8080::rq_timeout::0 webcluster::172.31.12.11:8080::rq_total::0 webcluster::172.31.12.11:8080::hostname::webserver01 webcluster::172.31.12.11:8080::health_flags::healthy webcluster::172.31.12.11:8080::weight::1 webcluster::172.31.12.11:8080::region:: webcluster::172.31.12.11:8080::zone:: webcluster::172.31.12.11:8080::sub_zone:: webcluster::172.31.12.11:8080::canary::false webcluster::172.31.12.11:8080::priority::0 webcluster::172.31.12.11:8080::success_rate::-1.0 webcluster::172.31.12.11:8080::local_origin_success_rate::-1.0 webcluster::172.31.12.12:8080::cx_active::0 webcluster::172.31.12.12:8080::cx_connect_fail::0 webcluster::172.31.12.12:8080::cx_total::0 webcluster::172.31.12.12:8080::rq_active::0 webcluster::172.31.12.12:8080::rq_error::0 webcluster::172.31.12.12:8080::rq_success::0 webcluster::172.31.12.12:8080::rq_timeout::0 webcluster::172.31.12.12:8080::rq_total::0 webcluster::172.31.12.12:8080::hostname::webserver02 webcluster::172.31.12.12:8080::health_flags::healthy webcluster::172.31.12.12:8080::weight::1 webcluster::172.31.12.12:8080::region:: webcluster::172.31.12.12:8080::zone:: webcluster::172.31.12.12:8080::sub_zone:: webcluster::172.31.12.12:8080::canary::false webcluster::172.31.12.12:8080::priority::0 webcluster::172.31.12.12:8080::success_rate::-1.0 webcluster::172.31.12.12:8080::local_origin_success_rate::-1.0 #新节点已经添加
实验环境
六个Service: envoy：Front Proxy,地址为172.31.16.2 webserver01：第一个后端服务 webserver01-sidecar：第一个后端服务的Sidecar Proxy,地址为172.31.16.11 webserver02：第二个后端服务 webserver02-sidecar：第二个后端服务的Sidecar Proxy,地址为172.31.16.12 xdsserver: xDS management server，地址为172.31.16.5
front-envoy.yaml
node: id: envoy_front_proxy cluster: webcluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 dynamic_resources: ads_config: api_type: GRPC transport_api_version: V3 grpc_services: - envoy_grpc: cluster_name: xds_cluster set_node_on_first_message_only: true cds_config: resource_api_version: V3 ads: {} lds_config: resource_api_version: V3 ads: {} static_resources: clusters: - name: xds_cluster connect_timeout: 0.25s type: STRICT_DNS # The extension_protocol_options field is used to provide extension-specific protocol options for upstream connections. typed_extension_protocol_options: envoy.extensions.upstreams.http.v3.HttpProtocolOptions: "@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions explicit_http_config: http2_protocol_options: {} lb_policy: ROUND_ROBIN load_assignment: cluster_name: xds_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: xdsserver port_value: 18000
envoy-sidecar-proxy.yaml
admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 static_resources: listeners: - name: listener_0 address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http codec_type: AUTO route_config: name: local_route virtual_hosts: - name: local_service domains: ["*"] routes: - match: { prefix: "/" } route: { cluster: local_cluster } http_filters: - name: envoy.filters.http.router clusters: - name: local_cluster connect_timeout: 0.25s type: STATIC lb_policy: ROUND_ROBIN load_assignment: cluster_name: local_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: { address: 127.0.0.1, port_value: 8080 }
docker-compose.yaml
version: '3.3' services: envoy: image: envoyproxy/envoy-alpine:v1.18-latest volumes: - ./front-envoy.yaml:/etc/envoy/envoy.yaml networks: envoymesh: ipv4_address: 172.31.16.2 aliases: - front-proxy depends_on: - webserver01 - webserver02 - xdsserver webserver01: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 hostname: webserver01 networks: envoymesh: ipv4_address: 172.31.16.11 webserver01-sidecar: image: envoyproxy/envoy-alpine:v1.18-latest volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml network_mode: "service:webserver01" depends_on: - webserver01 webserver02: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 hostname: webserver02 networks: envoymesh: ipv4_address: 172.31.16.12 webserver02-sidecar: image: envoyproxy/envoy-alpine:v1.18-latest volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml network_mode: "service:webserver02" depends_on: - webserver02 xdsserver: image: ikubernetes/envoy-xds-server:v0.1 environment: - SERVER_PORT=18000 - NODE_ID=envoy_front_proxy - RESOURCES_FILE=/etc/envoy-xds-server/config/config.yaml volumes: - ./resources:/etc/envoy-xds-server/config/ networks: envoymesh: ipv4_address: 172.31.16.5 aliases: - xdsserver - xds-service expose: - "18000" networks: envoymesh: driver: bridge ipam: config: - subnet: 172.31.16.0/24
resources目录中的文件
name: myconfig spec: listeners: - name: listener_http address: 0.0.0.0 port: 80 routes: - name: local_route prefix: / clusters: - webcluster clusters: - name: webcluster endpoints: - address: 172.31.16.11 port: 8080
config.yaml-v2
name: myconfig spec: listeners: - name: listener_http address: 0.0.0.0 port: 80 routes: - name: local_route prefix: / clusters: - webcluster clusters: - name: webcluster endpoints: - address: 172.31.16.11 port: 8080 - address: 172.31.16.12 port: 8080
实验验证
docker-compose up
克隆窗口
# 查看Cluster及Endpoints信息； root@test:~# curl 172.31.16.2:9901/clusters webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::true webcluster::172.31.16.11:8080::cx_active::0 webcluster::172.31.16.11:8080::cx_connect_fail::0 webcluster::172.31.16.11:8080::cx_total::0 webcluster::172.31.16.11:8080::rq_active::0 webcluster::172.31.16.11:8080::rq_error::0 webcluster::172.31.16.11:8080::rq_success::0 webcluster::172.31.16.11:8080::rq_timeout::0 webcluster::172.31.16.11:8080::rq_total::0 webcluster::172.31.16.11:8080::hostname:: webcluster::172.31.16.11:8080::health_flags::healthy webcluster::172.31.16.11:8080::weight::1 webcluster::172.31.16.11:8080::region:: webcluster::172.31.16.11:8080::zone:: webcluster::172.31.16.11:8080::sub_zone:: webcluster::172.31.16.11:8080::canary::false webcluster::172.31.16.11:8080::priority::0 webcluster::172.31.16.11:8080::success_rate::-1.0 webcluster::172.31.16.11:8080::local_origin_success_rate::-1.0 xds_cluster::observability_name::xds_cluster xds_cluster::default_priority::max_connections::1024 xds_cluster::default_priority::max_pending_requests::1024 xds_cluster::default_priority::max_requests::1024 xds_cluster::default_priority::max_retries::3 xds_cluster::high_priority::max_connections::1024 xds_cluster::high_priority::max_pending_requests::1024 xds_cluster::high_priority::max_requests::1024 xds_cluster::high_priority::max_retries::3 xds_cluster::added_via_api::false xds_cluster::172.31.16.5:18000::cx_active::1 xds_cluster::172.31.16.5:18000::cx_connect_fail::0 xds_cluster::172.31.16.5:18000::cx_total::1 xds_cluster::172.31.16.5:18000::rq_active::3 xds_cluster::172.31.16.5:18000::rq_error::0 xds_cluster::172.31.16.5:18000::rq_success::0 xds_cluster::172.31.16.5:18000::rq_timeout::0 xds_cluster::172.31.16.5:18000::rq_total::3 xds_cluster::172.31.16.5:18000::hostname::xdsserver xds_cluster::172.31.16.5:18000::health_flags::healthy xds_cluster::172.31.16.5:18000::weight::1 xds_cluster::172.31.16.5:18000::region:: xds_cluster::172.31.16.5:18000::zone:: xds_cluster::172.31.16.5:18000::sub_zone:: xds_cluster::172.31.16.5:18000::canary::false xds_cluster::172.31.16.5:18000::priority::0 xds_cluster::172.31.16.5:18000::success_rate::-1.0 xds_cluster::172.31.16.5:18000::local_origin_success_rate::-1.0 #查看动态Clusters的相关信息 root@test:~# curl -s 172.31.16.2:9901/config_dump | jq '.configs[1].dynamic_active_clusters' [ { "version_info": "411", "cluster": { "@type": "type.googleapis.com/envoy.config.cluster.v3.Cluster", "name": "webcluster", "type": "EDS", "eds_cluster_config": { "eds_config": { "api_config_source": { "api_type": "GRPC", "grpc_services": [ { "envoy_grpc": { "cluster_name": "xds_cluster" } } ], "set_node_on_first_message_only": true, "transport_api_version": "V3" }, "resource_api_version": "V3" } }, "connect_timeout": "5s", "dns_lookup_family": "V4_ONLY" }, "last_updated": "2021-12-02T07:47:28.765Z" } ] # 查看Listener列表 root@test:~# curl 172.31.16.2:9901/listeners listener_http::0.0.0.0:80 #查看动态的Listener信息 root@test:~# curl -s 172.31.16.2:9901/config_dump?resource=dynamic_listeners | jq '.configs[0].active_state.listener.address' { "socket_address": { "address": "0.0.0.0", "port_value": 80 } } # 接入xdsserver容器的交互式接口，修改config.yaml文件中的内容，将另一个endpoint添加进文件中，或进行其它修改； root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# docker-compose exec xdsserver sh / # cd /etc/envoy-xds-server/config/ /etc/envoy-xds-server/config #/etc/envoy-xds-server/config # cat config.yaml-v2 > config.yaml #提示：以上修改操作也可以直接在宿主机上的存储卷目录中进行。 # 再次查看Cluster中的Endpoint信息 root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# curl 172.31.16.2:9901/clusters webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::true webcluster::172.31.16.11:8080::cx_active::0 webcluster::172.31.16.11:8080::cx_connect_fail::0 webcluster::172.31.16.11:8080::cx_total::0 webcluster::172.31.16.11:8080::rq_active::0 webcluster::172.31.16.11:8080::rq_error::0 webcluster::172.31.16.11:8080::rq_success::0 webcluster::172.31.16.11:8080::rq_timeout::0 webcluster::172.31.16.11:8080::rq_total::0 webcluster::172.31.16.11:8080::hostname:: webcluster::172.31.16.11:8080::health_flags::healthy webcluster::172.31.16.11:8080::weight::1 webcluster::172.31.16.11:8080::region:: webcluster::172.31.16.11:8080::zone:: webcluster::172.31.16.11:8080::sub_zone:: webcluster::172.31.16.11:8080::canary::false webcluster::172.31.16.11:8080::priority::0 webcluster::172.31.16.11:8080::success_rate::-1.0 webcluster::172.31.16.11:8080::local_origin_success_rate::-1.0 webcluster::172.31.16.12:8080::cx_active::0 webcluster::172.31.16.12:8080::cx_connect_fail::0 webcluster::172.31.16.12:8080::cx_total::0 webcluster::172.31.16.12:8080::rq_active::0 webcluster::172.31.16.12:8080::rq_error::0 webcluster::172.31.16.12:8080::rq_success::0 webcluster::172.31.16.12:8080::rq_timeout::0 webcluster::172.31.16.12:8080::rq_total::0 webcluster::172.31.16.12:8080::hostname:: webcluster::172.31.16.12:8080::health_flags::healthy webcluster::172.31.16.12:8080::weight::1 webcluster::172.31.16.12:8080::region:: webcluster::172.31.16.12:8080::zone:: webcluster::172.31.16.12:8080::sub_zone:: webcluster::172.31.16.12:8080::canary::false webcluster::172.31.16.12:8080::priority::0 webcluster::172.31.16.12:8080::success_rate::-1.0 webcluster::172.31.16.12:8080::local_origin_success_rate::-1.0 xds_cluster::observability_name::xds_cluster xds_cluster::default_priority::max_connections::1024 xds_cluster::default_priority::max_pending_requests::1024 xds_cluster::default_priority::max_requests::1024 xds_cluster::default_priority::max_retries::3 xds_cluster::high_priority::max_connections::1024 xds_cluster::high_priority::max_pending_requests::1024 xds_cluster::high_priority::max_requests::1024 xds_cluster::high_priority::max_retries::3 xds_cluster::added_via_api::false xds_cluster::172.31.16.5:18000::cx_active::1 xds_cluster::172.31.16.5:18000::cx_connect_fail::0 xds_cluster::172.31.16.5:18000::cx_total::1 xds_cluster::172.31.16.5:18000::rq_active::3 xds_cluster::172.31.16.5:18000::rq_error::0 xds_cluster::172.31.16.5:18000::rq_success::0 xds_cluster::172.31.16.5:18000::rq_timeout::0 xds_cluster::172.31.16.5:18000::rq_total::3 xds_cluster::172.31.16.5:18000::hostname::xdsserver xds_cluster::172.31.16.5:18000::health_flags::healthy xds_cluster::172.31.16.5:18000::weight::1 xds_cluster::172.31.16.5:18000::region:: xds_cluster::172.31.16.5:18000::zone:: xds_cluster::172.31.16.5:18000::sub_zone:: xds_cluster::172.31.16.5:18000::canary::false xds_cluster::172.31.16.5:18000::priority::0 xds_cluster::172.31.16.5:18000::success_rate::-1.0 xds_cluster::172.31.16.5:18000::local_origin_success_rate::-1.0 #新节点已经添加
5、lds-cds-grpc
六个Service: envoy：Front Proxy,地址为172.31.15.2 webserver01：第一个后端服务 webserver01-sidecar：第一个后端服务的Sidecar Proxy,地址为172.31.15.11 webserver02：第二个后端服务 webserver02-sidecar：第二个后端服务的Sidecar Proxy,地址为172.31.15.12 xdsserver: xDS management server，地址为172.31.15.5
envoy_front_proxy.yaml
node: id: envoy_front_proxy cluster: webcluster admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 dynamic_resources: lds_config: resource_api_version: V3 api_config_source: api_type: GRPC transport_api_version: V3 grpc_services: - envoy_grpc: cluster_name: xds_cluster cds_config: resource_api_version: V3 api_config_source: api_type: GRPC transport_api_version: V3 grpc_services: - envoy_grpc: cluster_name: xds_cluster static_resources: clusters: - name: xds_cluster connect_timeout: 0.25s type: STRICT_DNS # The extension_protocol_options field is used to provide extension-specific protocol options for upstream connections. typed_extension_protocol_options: envoy.extensions.upstreams.http.v3.HttpProtocolOptions: "@type": type.googleapis.com/envoy.extensions.upstreams.http.v3.HttpProtocolOptions explicit_http_config: http2_protocol_options: {} lb_policy: ROUND_ROBIN load_assignment: cluster_name: xds_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: address: xdsserver port_value: 18000
envoy-sidecar-proxy.yaml
admin: profile_path: /tmp/envoy.prof access_log_path: /tmp/admin_access.log address: socket_address: address: 0.0.0.0 port_value: 9901 static_resources: listeners: - name: listener_0 address: socket_address: { address: 0.0.0.0, port_value: 80 } filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http codec_type: AUTO route_config: name: local_route virtual_hosts: - name: local_service domains: ["*"] routes: - match: { prefix: "/" } route: { cluster: local_cluster } http_filters: - name: envoy.filters.http.router clusters: - name: local_cluster connect_timeout: 0.25s type: STATIC lb_policy: ROUND_ROBIN load_assignment: cluster_name: local_cluster endpoints: - lb_endpoints: - endpoint: address: socket_address: { address: 127.0.0.1, port_value: 8080 }
docker-compose.yaml
version: '3.3' services: envoy: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./front-envoy.yaml:/etc/envoy/envoy.yaml networks: envoymesh: ipv4_address: 172.31.15.2 aliases: - front-proxy depends_on: - webserver01 - webserver02 - xdsserver webserver01: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 hostname: webserver01 networks: envoymesh: ipv4_address: 172.31.15.11 webserver01-sidecar: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml network_mode: "service:webserver01" depends_on: - webserver01 webserver02: image: ikubernetes/demoapp:v1.0 environment: - PORT=8080 - HOST=127.0.0.1 hostname: webserver02 networks: envoymesh: ipv4_address: 172.31.15.12 webserver02-sidecar: image: envoyproxy/envoy-alpine:v1.20.0 environment: - ENVOY_UID=0 volumes: - ./envoy-sidecar-proxy.yaml:/etc/envoy/envoy.yaml network_mode: "service:webserver02" depends_on: - webserver02 xdsserver: image: ikubernetes/envoy-xds-server:v0.1 environment: - SERVER_PORT=18000 - NODE_ID=envoy_front_proxy - RESOURCES_FILE=/etc/envoy-xds-server/config/config.yaml volumes: - ./resources:/etc/envoy-xds-server/config/ networks: envoymesh: ipv4_address: 172.31.15.5 aliases: - xdsserver - xds-service expose: - "18000" networks: envoymesh: driver: bridge ipam: config: - subnet: 172.31.15.0/24
resources目录文件
name: myconfig spec: listeners: - name: listener_http address: 0.0.0.0 port: 80 routes: - name: local_route prefix: / clusters: - webcluster clusters: - name: webcluster endpoints: - address: 172.31.15.11 port: 8080
config.yaml-v2
name: myconfig spec: listeners: - name: listener_http address: 0.0.0.0 port: 80 routes: - name: local_route prefix: / clusters: - webcluster clusters: - name: webcluster endpoints: - address: 172.31.15.11 port: 8080 - address: 172.31.15.12 port: 8080
实验验证
docker-compose up
克隆窗口
# 查看Cluster及Endpoints信息 root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# curl 172.31.15.2:9901/clusters xds_cluster::observability_name::xds_cluster xds_cluster::default_priority::max_connections::1024 xds_cluster::default_priority::max_pending_requests::1024 xds_cluster::default_priority::max_requests::1024 xds_cluster::default_priority::max_retries::3 xds_cluster::high_priority::max_connections::1024 xds_cluster::high_priority::max_pending_requests::1024 xds_cluster::high_priority::max_requests::1024 xds_cluster::high_priority::max_retries::3 xds_cluster::added_via_api::false xds_cluster::172.31.15.5:18000::cx_active::1 xds_cluster::172.31.15.5:18000::cx_connect_fail::0 xds_cluster::172.31.15.5:18000::cx_total::1 xds_cluster::172.31.15.5:18000::rq_active::4 xds_cluster::172.31.15.5:18000::rq_error::0 xds_cluster::172.31.15.5:18000::rq_success::0 xds_cluster::172.31.15.5:18000::rq_timeout::0 xds_cluster::172.31.15.5:18000::rq_total::4 xds_cluster::172.31.15.5:18000::hostname::xdsserver xds_cluster::172.31.15.5:18000::health_flags::healthy xds_cluster::172.31.15.5:18000::weight::1 xds_cluster::172.31.15.5:18000::region:: xds_cluster::172.31.15.5:18000::zone:: xds_cluster::172.31.15.5:18000::sub_zone:: xds_cluster::172.31.15.5:18000::canary::false xds_cluster::172.31.15.5:18000::priority::0 xds_cluster::172.31.15.5:18000::success_rate::-1.0 xds_cluster::172.31.15.5:18000::local_origin_success_rate::-1.0 webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::true webcluster::172.31.15.11:8080::cx_active::0 webcluster::172.31.15.11:8080::cx_connect_fail::0 webcluster::172.31.15.11:8080::cx_total::0 webcluster::172.31.15.11:8080::rq_active::0 webcluster::172.31.15.11:8080::rq_error::0 webcluster::172.31.15.11:8080::rq_success::0 webcluster::172.31.15.11:8080::rq_timeout::0 webcluster::172.31.15.11:8080::rq_total::0 webcluster::172.31.15.11:8080::hostname:: webcluster::172.31.15.11:8080::health_flags::healthy webcluster::172.31.15.11:8080::weight::1 webcluster::172.31.15.11:8080::region:: webcluster::172.31.15.11:8080::zone:: webcluster::172.31.15.11:8080::sub_zone:: webcluster::172.31.15.11:8080::canary::false webcluster::172.31.15.11:8080::priority::0 webcluster::172.31.15.11:8080::success_rate::-1.0 webcluster::172.31.15.11:8080::local_origin_success_rate::-1.0 #或者查看动态Clusters的相关信息 root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# curl -s 172.31.15.2:9901/config_dump | jq '.configs[1].dynamic_active_clusters' [ { "version_info": "411", "cluster": { "@type": "type.googleapis.com/envoy.config.cluster.v3.Cluster", "name": "webcluster", "type": "EDS", "eds_cluster_config": { "eds_config": { "api_config_source": { "api_type": "GRPC", "grpc_services": [ { "envoy_grpc": { "cluster_name": "xds_cluster" } } ], "set_node_on_first_message_only": true, "transport_api_version": "V3" }, "resource_api_version": "V3" } }, "connect_timeout": "5s", "dns_lookup_family": "V4_ONLY" }, "last_updated": "2021-12-02T08:05:20.650Z" } ] # 查看Listener列表 root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# curl 172.31.15.2:9901/listeners listener_http::0.0.0.0:80 #或者查看动态的Listener信息 root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# curl -s 172.31.15.2:9901/config_dump?resource=dynamic_listeners | jq '.configs[0].active_state.listener.address' { "socket_address": { "address": "0.0.0.0", "port_value": 80 } } # 接入xdsserver容器的交互式接口，修改config.yaml文件中的内容，将另一个endpoint添加进文件中，或进行其它修改； root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# docker exec -it lds-cds-grpc_xdsserver_1 sh / # cd /etc/envoy-xds-server/config /etc/envoy-xds-server/config # cat config.yaml-v2 > config.yaml #提示：以上修改操作也可以直接在宿主机上的存储卷目录中进行。 # 再次查看Cluster中的Endpoint信息 root@test:/apps/servicemesh_in_practise-develop/Dynamic-Configuration/ads-grpc# curl 172.31.15.2:9901/clusters xds_cluster::observability_name::xds_cluster xds_cluster::default_priority::max_connections::1024 xds_cluster::default_priority::max_pending_requests::1024 xds_cluster::default_priority::max_requests::1024 xds_cluster::default_priority::max_retries::3 xds_cluster::high_priority::max_connections::1024 xds_cluster::high_priority::max_pending_requests::1024 xds_cluster::high_priority::max_requests::1024 xds_cluster::high_priority::max_retries::3 xds_cluster::added_via_api::false xds_cluster::172.31.15.5:18000::cx_active::1 xds_cluster::172.31.15.5:18000::cx_connect_fail::0 xds_cluster::172.31.15.5:18000::cx_total::1 xds_cluster::172.31.15.5:18000::rq_active::4 xds_cluster::172.31.15.5:18000::rq_error::0 xds_cluster::172.31.15.5:18000::rq_success::0 xds_cluster::172.31.15.5:18000::rq_timeout::0 xds_cluster::172.31.15.5:18000::rq_total::4 xds_cluster::172.31.15.5:18000::hostname::xdsserver xds_cluster::172.31.15.5:18000::health_flags::healthy xds_cluster::172.31.15.5:18000::weight::1 xds_cluster::172.31.15.5:18000::region:: xds_cluster::172.31.15.5:18000::zone:: xds_cluster::172.31.15.5:18000::sub_zone:: xds_cluster::172.31.15.5:18000::canary::false xds_cluster::172.31.15.5:18000::priority::0 xds_cluster::172.31.15.5:18000::success_rate::-1.0 xds_cluster::172.31.15.5:18000::local_origin_success_rate::-1.0 webcluster::observability_name::webcluster webcluster::default_priority::max_connections::1024 webcluster::default_priority::max_pending_requests::1024 webcluster::default_priority::max_requests::1024 webcluster::default_priority::max_retries::3 webcluster::high_priority::max_connections::1024 webcluster::high_priority::max_pending_requests::1024 webcluster::high_priority::max_requests::1024 webcluster::high_priority::max_retries::3 webcluster::added_via_api::true webcluster::172.31.15.11:8080::cx_active::0 webcluster::172.31.15.11:8080::cx_connect_fail::0 webcluster::172.31.15.11:8080::cx_total::0 webcluster::172.31.15.11:8080::rq_active::0 webcluster::172.31.15.11:8080::rq_error::0 webcluster::172.31.15.11:8080::rq_success::0 webcluster::172.31.15.11:8080::rq_timeout::0 webcluster::172.31.15.11:8080::rq_total::0 webcluster::172.31.15.11:8080::hostname:: webcluster::172.31.15.11:8080::health_flags::healthy webcluster::172.31.15.11:8080::weight::1 webcluster::172.31.15.11:8080::region:: webcluster::172.31.15.11:8080::zone:: webcluster::172.31.15.11:8080::sub_zone:: webcluster::172.31.15.11:8080::canary::false webcluster::172.31.15.11:8080::priority::0 webcluster::172.31.15.11:8080::success_rate::-1.0 webcluster::172.31.15.11:8080::local_origin_success_rate::-1.0 webcluster::172.31.15.12:8080::cx_active::0 webcluster::172.31.15.12:8080::cx_connect_fail::0 webcluster::172.31.15.12:8080::cx_total::0 webcluster::172.31.15.12:8080::rq_active::0 webcluster::172.31.15.12:8080::rq_error::0 webcluster::172.31.15.12:8080::rq_success::0 webcluster::172.31.15.12:8080::rq_timeout::0 webcluster::172.31.15.12:8080::rq_total::0 webcluster::172.31.15.12:8080::hostname:: webcluster::172.31.15.12:8080::health_flags::healthy webcluster::172.31.15.12:8080::weight::1 webcluster::172.31.15.12:8080::region:: webcluster::172.31.15.12:8080::zone:: webcluster::172.31.15.12:8080::sub_zone:: webcluster::172.31.15.12:8080::canary::false webcluster::172.31.15.12:8080::priority::0 webcluster::172.31.15.12:8080::success_rate::-1.0 webcluster::172.31.15.12:8080::local_origin_success_rate::-1.0 #新节点已加入
I have a dream so I study hard!!!
