day02 K8S
1.前情回顾
源码部署k8s
gitlib就是github的开源实现
harbor类似这样
// 计算节点要关闭swap分区
apiServer启动默认监听6443（tls通信）以及8080（http通信）
controllerManager和scheduler和apiServer部署在同一个物理机的目的，保证这2个服务和apiServer是通过本机的127.0.0.1:8080通信的，比tls的证书通信要效率高一些
1.1重要节点工作职责
etcd（监听2380端口对外，2379是集群内部之间通信）无所谓，和etcd是通过tcp socket
etcd要保证计数个，自己有自己的高可用机制
apiServer->接受api请求，该存etcd，该调度scheduler调度，该去找controller-manager就去找
kubelet->干活最累的，去起容器的
kube-proxy->实现了k8s里面pod网络和service网络的连接（1.12开始使用ipvs的流量调度算法，调度集群的流量，1.3版本用的userspace调度造成了极大的资源浪费，很多公有云厂商用的还是iptables规则）
2.cfssl工具
cfssl:证书签发的主要工具
cfssl-json:将cfssl生成的证书(json格式)变为文件承载式证书
cfssl-certinof:验证证书的信息,证书有效期。入职时一定要注意看
[root@jdss7-200 certs]# cfssl-certinfo -cert apiserver.pem
{
"subject": {
"common_name": "k8s-apiserver",
"country": "CN",
"organization": "od",
"organizational_unit": "ops",
"locality": "beijing",
"province": "beijing",
"names": [
"CN",
"beijing",
"beijing",
"od",
"ops",
"k8s-apiserver"
]
},
"issuer": {
"common_name": "OldboyEdu",
"country": "CN",
"organization": "od",
"organizational_unit": "ops",
"locality": "beijing",
"province": "beijing",
"names": [
"CN",
"beijing",
"beijing",
"od",
"ops",
"OldboyEdu"
]
},
"serial_number": "623283726608787615526450732742237323307482519058",
"sans": [
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local",
"127.0.0.1",
"192.168.0.1",
"10.4.7.10",
"10.4.7.21",
"10.4.7.22",
"10.4.7.23"
],
"not_before": "2021-12-20T07:01:00Z",
"not_after": "2041-12-15T07:01:00Z",
"sigalg": "SHA256WithRSA",
"authority_key_id": "41:78:51:4F:F0:70:FC:4D:4E:55:4E:AD:97:FD:4C:49:11:14:FE:1C",
"subject_key_id": "84:31:2D:E8:51:7A:EC:6:E5:90:4C:2E:CD:75:C6:64:F4:5:BA:C9",
"pem": "-----BEGIN CERTIFICATE-----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\nM05d3rNklfLWhThQv8It3bNiIO22a/pSm1mcsVVCd4QGjlo=\n-----END CERTIFICATE-----\n"
}
cfssl-certinfo -domain www.baidu.com 查看百度的证书信息
{
"subject": {
"common_name": "baidu.com",
"country": "CN",
"organization": "Beijing Baidu Netcom Science Technology Co., Ltd",
"organizational_unit": "service operation department",
"locality": "beijing",
"province": "beijing",
"names": [
"CN",
"beijing",
"beijing",
"service operation department",
"Beijing Baidu Netcom Science Technology Co., Ltd",
"baidu.com"
]
},
"issuer": {
"common_name": "GlobalSign Organization Validation CA - SHA256 - G2",
"country": "BE",
"organization": "GlobalSign nv-sa",
"names": [
"BE",
"GlobalSign nv-sa",
"GlobalSign Organization Validation CA - SHA256 - G2"
]
},
"serial_number": "35351242533515273557482149369",
"sans": [
"baidu.com",
"baifubao.com",
"www.baidu.cn",
"www.baidu.com.cn",
"mct.y.nuomi.com",
"apollo.auto",
"dwz.cn",
"*.baidu.com",
"*.baifubao.com",
"*.baidustatic.com",
"*.bdstatic.com",
"*.bdimg.com",
"*.hao123.com",
"*.nuomi.com",
"*.chuanke.com",
"*.trustgo.com",
"*.bce.baidu.com",
"*.eyun.baidu.com",
"*.map.baidu.com",
"*.mbd.baidu.com",
"*.fanyi.baidu.com",
"*.baidubce.com",
"*.mipcdn.com",
"*.news.baidu.com",
"*.baidupcs.com",
"*.aipage.com",
"*.aipage.cn",
"*.bcehost.com",
"*.safe.baidu.com",
"*.im.baidu.com",
"*.baiducontent.com",
"*.dlnel.com",
"*.dlnel.org",
"*.dueros.baidu.com",
"*.su.baidu.com",
"*.91.com",
"*.hao123.baidu.com",
"*.apollo.auto",
"*.xueshu.baidu.com",
"*.bj.baidubce.com",
"*.gz.baidubce.com",
"*.smartapps.cn",
"*.bdtjrcv.com",
"*.hao222.com",
"*.haokan.com",
"*.pae.baidu.com",
"*.vd.bdstatic.com",
"*.cloud.baidu.com",
"click.hm.baidu.com",
"log.hm.baidu.com",
"cm.pos.baidu.com",
"wn.pos.baidu.com",
"update.pan.baidu.com"
],
"not_before": "2021-07-01T01:16:03Z",
"not_after": "2022-08-02T01:16:03Z",
"sigalg": "SHA256WithRSA",
"authority_key_id": "96:DE:61:F1:BD:1C:16:29:53:1C:C0:CC:7D:3B:83:0:40:E6:1A:7C",
"subject_key_id": "34:92:9A:2F:C:71:62:BC:3D:DB:23:6D:6D:3E:B3:D1:1D:11:9D:ED",
"pem": "-----BEGIN CERTIFICATE-----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\n1z5MXsKSeOQbTpsoNp8Yd/K79WpkcXgP6tVofxFXtP8PsORz\n-----END CERTIFICATE-----\n"
}
从kube-config里可以反解证书
[root@jdss7-200 certs]# echo "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" | base64 -d
k8s里面证书要做的门清才行
2.1 kubeconfig文件
- 其实是一个k8s用户的配置文件
- 里面包含证书的信息
- 证书过期或者更换，需要同步替换该文件
（证书过期，重新签发证书，这个kubeconfig文件要重新去生成）
kublet.kubeconfig以及kube-proxy.kubeconfig
3.kubectl命令行工具的使用
CNI网络插件flannel，解决pod之间不能跨主机通信
服务发现插件coredns
服务暴露插件trafilk
GUI管理工具dashboard(k8s 在1.16以上跑步起来)
rbac基于角色的访问控制
heapster，dashboard的监控小插件，让dashboard看着好看一些，基本不用了
kubernetes维护的生产经验
4.管理k8s核心资源（pod，pod控制器，service，ingress）的三种基本方法
- 陈述式管理方法-主要依赖命令行cli工具进行管理
- 声明式管理方法-主要依赖统一资源配置清单（mainfest）进行管理
- gui管理方法-主要依赖图形化操作界面（web页面）进行管理
5. 陈述式资源管理
命令行工具用于与apiserver进行通信，用户在命令行输入的命令，组织并转化为apiserver能识别的信息，交互与本机127.0.0.1的apiserver，从而进行管理k8s各种资源的有效途径
5.1 命名空间
- 查看名称空间
[root@jdss7-21 ~]# kubectl get namespace
NAME STATUS AGE
default Active 14d
kube-node-lease Active 14d
kube-public Active 14d
kube-system Active 14d
[root@jdss7-21 ~]# kubectl get ns
NAME STATUS AGE
default Active 14d
kube-node-lease Active 14d
kube-public Active 14d
kube-system Active 14d
不同名称空间的资源是有可能重名的
- 查询default空间里的所有资源
[root@jdss7-21 ~]# kubectl get all -n default
NAME READY STATUS RESTARTS AGE
pod/nginx-ds-8gbdr 1/1 Running 1 14d
pod/nginx-ds-twfkj 1/1 Running 2 14d
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 192.168.0.1 <none> 443/TCP 14d
NAME DESIRED CURRENT READY UP-TO-DATE AVAILABLE NODE SELECTOR AGE
daemonset.apps/nginx-ds 2 2 2 2 2 <none> 14d
daemonset是pod控制器
- 创建名称空间
创建一个名叫app的namespace
[root@jdss7-21 ~]# kubectl create namespace app
namespace/app created
- 删除名称空间
[root@jdss7-21 ~]# kubectl delete namespace app
namespace "app" deleted
5.2 pod控制器
- 创建pod控制器，用来保证给你拉起一个pod，使的无限接近你，预先设置一个值，让资源无限向我靠近
创建一个名为nginx-dp的pod控制器
[root@jdss7-21 ~]# kubectl create deployment nginx-dp --image=harbor.od.com/public/nginx:v1.7.9 -n kube-public
deployment.apps/nginx-dp created
查看新创建的pod控制器
[root@jdss7-21 ~]# kubectl get deploy -n kube-public
NAME READY UP-TO-DATE AVAILABLE AGE
nginx-dp 1/1 1 1 42s
[root@jdss7-21 ~]# kubectl get pods -n kube-public
NAME READY STATUS RESTARTS AGE
nginx-dp-5dfc689474-jnznx 1/1 Running 0 52s
用扩展的方式显示我们的资源
[root@jdss7-21 ~]# kubectl get pods -n kube-public -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-dp-5dfc689474-jnznx 1/1 Running 0 2m42s 172.7.22.3 jdss7-22.host.com <none> <none>
可以看到起来的ip地址是172.7.22.3，一下看出来是存在于7.22的计算节点上
7.22计算节点使用docker ps -a 查看5dfc689474的容器
pause镜像和你的业务镜像是边车模式运行的，帮你业务容器拉起来前，先帮你ipc空间，网络空间。uts等空间先占上
查看详细资源，查看详细pod控制器
/opt/kubernetes/server/bin/conf/kubelet.kubeconfig 文件里写死了server是
server: https://10.4.7.10:7443
- 查看pod资源
[root@jdss7-21 ~]# kubectl get pods -n kube-public
NAME READY STATUS RESTARTS AGE
nginx-dp-5dfc689474-jnznx 1/1 Running 0 37m
- 进入pod资源
[root@jdss7-21 ~]# kubectl exec -ti nginx-dp-5dfc689474-jnznx /bin/bash -n kube-public
- 删除pod资源(其实是重启pod容器,pod控制器来保证即使delete的pod后，pod控制器用来保证要和预期一样还会新拉取一个pod起来,拉起来的pod可能ip会变)
[root@jdss7-22 ~]# kubectl delete pods nginx-dp-5dfc689474-jnznx -n kube-public
pod "nginx-dp-5dfc689474-jnznx" deleted
强制删除pod参数(--force --grace-period=0)
- 删除deployment资源
[root@jdss7-21 ~]# kubectl delete deployment nginx-dp -n kube-public
deployment.extensions "nginx-dp" deleted
查看
No resources found.
[root@jdss7-21 ~]# kubectl get all -n kube-public
No resources found.
5.3 service资源
- 创建service资源
service给pod提供一个稳定的接入点
[root@jdss7-21 ~]# kubectl expose deployment nginx-dp --port=80 -n kube-public
service/nginx-dp exposed
clusterIp就是你pod的固定接入点，你pod的ip怎么变，这个clusterIp不会变
搞成2份
[root@jdss7-21 ~]# kubectl scale deployment nginx-dp --replicas=2 -n kube-public
deployment.extensions/nginx-dp scaled
- 查看service
[root@jdss7-21 ~]# kubectl describe svc nginx-dp -n kube-public
Name: nginx-dp
Namespace: kube-public
Labels: app=nginx-dp
Annotations: <none>
Selector: app=nginx-dp
Type: ClusterIP
IP: 192.168.5.14
Port: <unset> 80/TCP
TargetPort: 80/TCP
Endpoints: 172.7.21.3:80
Session Affinity: None
Events: <none>
service如何找到pod的，依赖lable selector
6.k8s中文社区
docs.kubernetes.org.cn/683.html
7.命令行的缺点
命令冗长，复杂，难以记忆
特定场景下，无法实现管理需求
对资源增，删，查操作比较容易，改就很痛苦
8.特色的声明资源管理方法
依赖于资源配置清单(yaml/json)
- 查看pod的资源配置清单
[root@jdss7-21 ~]# kubectl get pods nginx-dp-5dfc689474-t98fx -o yaml -n kube-public
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: "2022-01-04T07:49:48Z"
generateName: nginx-dp-5dfc689474-
labels:
app: nginx-dp
pod-template-hash: 5dfc689474
name: nginx-dp-5dfc689474-t98fx
namespace: kube-public
ownerReferences:
- apiVersion: apps/v1
blockOwnerDeletion: true
controller: true
kind: ReplicaSet
name: nginx-dp-5dfc689474
uid: e6029552-05d5-40f3-8640-af3c915a0b6c
resourceVersion: "73732"
selfLink: /api/v1/namespaces/kube-public/pods/nginx-dp-5dfc689474-t98fx
uid: 8fbb5af0-f41a-4229-ada5-c2e61747cbbd
spec:
containers:
- image: harbor.od.com/public/nginx:v1.7.9
imagePullPolicy: IfNotPresent
name: nginx
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: default-token-f7th5
readOnly: true
dnsPolicy: ClusterFirst
enableServiceLinks: true
nodeName: jdss7-21.host.com
priority: 0
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: default
serviceAccountName: default
terminationGracePeriodSeconds: 30
tolerations:
- effect: NoExecute
key: node.kubernetes.io/not-ready
operator: Exists
tolerationSeconds: 300
- effect: NoExecute
key: node.kubernetes.io/unreachable
operator: Exists
tolerationSeconds: 300
volumes:
- name: default-token-f7th5
secret:
defaultMode: 420
secretName: default-token-f7th5
status:
conditions:
- lastProbeTime: null
lastTransitionTime: "2022-01-04T07:49:48Z"
status: "True"
type: Initialized
- lastProbeTime: null
lastTransitionTime: "2022-01-04T07:49:49Z"
status: "True"
type: Ready
- lastProbeTime: null
lastTransitionTime: "2022-01-04T07:49:49Z"
status: "True"
type: ContainersReady
- lastProbeTime: null
lastTransitionTime: "2022-01-04T07:49:48Z"
status: "True"
type: PodScheduled
containerStatuses:
- containerID: docker://03a9fa9a975386441944201489c936fab0e6bd8562c201ef2c5cb82fa35a8e46
image: harbor.od.com/public/nginx:v1.7.9
imageID: docker-pullable://harbor.od.com/public/nginx@sha256:b1f5935eb2e9e2ae89c0b3e2e148c19068d91ca502e857052f14db230443e4c2
lastState: {}
name: nginx
ready: true
restartCount: 0
state:
running:
startedAt: "2022-01-04T07:49:49Z"
hostIP: 10.4.7.21
phase: Running
podIP: 172.7.21.3
qosClass: BestEffort
startTime: "2022-01-04T07:49:48Z"
- 查看svc的资源配置清单
[root@jdss7-21 ~]# kubectl get svc nginx-dp -o yaml -n kube-public
apiVersion: v1
kind: Service
metadata:
creationTimestamp: "2022-01-04T07:57:19Z"
labels:
app: nginx-dp
name: nginx-dp
namespace: kube-public
resourceVersion: "74379"
selfLink: /api/v1/namespaces/kube-public/services/nginx-dp
uid: 2cc6d303-ba90-4580-91b9-82af20840ee3
spec:
clusterIP: 192.168.5.14
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: nginx-dp
sessionAffinity: None
type: ClusterIP
status:
loadBalancer: {}
- 用explain 查看帮助文档
[root@jdss7-21 ~]# kubectl explain service.metadata
- 创建资源配置清单nginx-ds-svc.yaml
apiVersion: v1
kind: Service
metadata:
labels:
app: nginx-ds
name: nginx-ds
namespace: default
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: nginx-ds
sessionAffinity: None
type: ClusterIP
使用声明式方式使用资源配置清单
- 干掉名为nginx-ds的svc
[root@jdss7-21 ~]# kubectl delete svc nginx-ds
service "nginx-ds" deleted
-
修改资源配置清单并应用
离线修改
kubectl apply -f nginx-ds-svc.yaml
在线修改
kubectl edit svc nginx-ds -
删除资源配置清单
[root@jdss7-21 ~]# kubectl delete svc nginx-ds
service "nginx-ds" deleted
[root@jdss7-21 ~]# kubectl delete -f nginx-ds-svc.yaml
9.声明式资源管理方法小结
依赖于资源配置清单yaml文件对资源进行管理
对资源的管理，通过事先定义在同一资源配置清单内，陈述式命令应用到K8S集群里
预发格式
kubectl create/apply/delete -f /path/to/yaml
资源配置清单的学习方法:
tip1：多看别人（官方）写的，能读懂
tip2：能照现成的文件改着用
tip3：遇到不懂的，用kubectl explain 查
tip4：初学切忌上来无中生有，自己憋着写
10.flanneId（cni里面的一个插件）
k8s里面的网络模型，集群之间，两个运算节点的docker还不能正常通信
最主要的功能就是：pod资源能够跨宿主机进行通信
不同环境部署多套k8s，要做物理的网络隔离，不要用网络插件做网络隔离的东西
10.1 部署flanned
下载二进制包，解压
必要的配置，签证书，启动脚本
创建目录，用户，委托给
380油费，13次洗车，验车，3月领年检标，验车。年检标。3135.76。（合计2755）
在7.21和7.22计算节点上都装flannel
https://github.com/flannel-io/flannel/releases
下载0.11.0的版本
cd /opt/src
- 二进制包放这里
mkdir -p /opt/flannel-v0.11.0
tar xf flannel-v0.11.0-linux-amd64.tar.gz -C /opt/flannel-v0.11.0/
ln -s /opt/flannel-v0.11.0/ /opt/flannel
mkdir -p /opt/flannel/cert
scp jdss7-200:/opt/certs/ca.pem .
scp jdss7-200:/opt/certs/client.pem .
scp jdss7-200:/opt/certs/client-key.pem
// flannel默认使用etcd做一些存储及配置的
- 创建配置文件
/opt/flannel/subnet.env
FLANNEL_NETWORK=172.7.0.0/16
FLANNEL_SUBNET=172.7.21.1/24
FLANNEL_MTU=1500
FLANNEL_IPMASQ=false
- 创建启动脚本
/opt/flannel/flanneld.sh
#!/bin/sh
./flanneld \
--public-ip=10.4.7.21 \
--etcd-endpoints=https://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379 \
--etcd-keyfile=./cert/client-key.pem \
--etcd-certfile=./cert/client.pem \
--etcd-cafile=./cert/ca.pem \
--iface=enp0s3 \
--subnet-file=./subnet.env \
--healthz-port=2401
mkdir -p /data/logs/flanneld
- 增加etcd的基础配置
etcd上设置flanneld的网络配置(7.21上就有etcd)
./etcdctl set /coreos.com/network/config '{"Network":"172.7.0.0/16","Backend":{"Type":"host-gw"}}'
- 添加supervisor配置
/etc/supervisord.d/flanneld.ini
[program:flanneld-7-21]
command=/opt/flannel/flanneld.sh ;
numprocs=1 ;
directory=/opt/flannel ;
autostart=true ;
autorestart=true ;
startsecs=30 ;
startretries=3 ;
exitcodes=0,2 ;
stopsignal=QUIT ;
stopwaitsecs=10 ;
user=root ;
redirect_stderr=true ;
stdout_logfile=/data/logs/flanneld/flanneld.stdout.log ;
stdout_logfile_maxbytes=64MB ;
stdout_logfile_backups=4 ;
stdout_capture_maxbytes=1MB ;
stdout_events_enabled=false ;
- supervisorctl update
21及22的机器上，都保证flanneld服务开启，各自宿主机上面的pod之间就可以互通了
10.2 flanneId 的host-gateway原理
局限：宿主机必须公用一个网关，在一个网段下
7.22机器上添加了一条路由表(flanneId的host的gateway模式,效率最高,内核转发)
route add -net 172.7.22.0/24 gw 10.4.7.22 dev eth0
route add -net 172.7.21.0/24 gw 10.4.7.21 dev eth0
10.3 flanneId 的vxlan原理（网络隧道）
两台不同的宿主机，每台宿主机虚拟化出来1个虚拟设备flannel.1
网络封包，解包,像VPN
vxlan如何使用
配置不一样
{"Network":"172.7.0.0/16","Backend":{"Type":"VxLAN"}}
查看目前使用的flanneId模式
etcdctl get /coreos.com/network/config
etcdctl rm /coreos.com/network/config
etcdctl set /coreos.com/network/config '{"Network":"172.7.0.0/16","Backend":{"Type":"VxLAN"}}'
重启flanneId，大概需要30秒时间
通过两个虚拟设备，打通虚拟网络设备
10.4 直接路由模型(vxlan和直接路由的混合模型)
当发现两台宿主机在同一个二层网络下的时候，就走host-gateway
{"Network":"172.7.0.0/16","Backend":{"Type":"VxLAN","Directrouting":true}}
10.5 flannel之snat规则优化
修改7.21机器上家目录的nginx-ds.yaml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: nginx-ds
spec:
template:
metadata:
labels:
app: nginx-ds
spec:
containers:
- name: my-nginx
image: harbor.od.com/public/nginx:curl
ports:
- containerPort: 8
kubectl apply -f nginx-ds.yaml
kubectl delete pod nginx-ds-twfkj // 重启pod
172.7.21.3 去访问http://172.7.22.2/ ，发现对端nginx记录的是宿主机的ip
怎么办SNAT转换
[root@jdss7-21 ~]# iptables-save | grep -i postrouting
:POSTROUTING ACCEPT [4:240]
:KUBE-POSTROUTING - [0:0]
-A POSTROUTING -s 172.7.21.0/24 ! -o docker0 -j MASQUERADE // 源地址是172.7.21.0地址段的出口是docker0网卡的，做转换
-A POSTROUTING -m comment --comment "kubernetes postrouting rules" -j KUBE-POSTROUTING
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -m mark --mark 0x4000/0x4000 -j MASQUERADE
-A KUBE-POSTROUTING -m comment --comment "Kubernetes endpoints dst ip:port, source ip for solving hairpin purpose" -m set --match-set KUBE-LOOP-BACK dst,dst,src -j MASQUERADE
修改规则
yum install iptables-services -y
systemctl enable iptables
systemctl start iptables
干掉规则-A POSTROUTING -s 172.7.21.0/24 ! -o docker0 -j MASQUERADE
iptables -t nat -D POSTROUTING -s 172.7.21.0/24 ! -o docker0 -j MASQUERADE
添加规则-A POSTROUTING -s 172.7.21.0/24 ! -d 172.7.0.0/16 ! -o docker0 -j MASQUERADE//来源是172.7.21.0/24网段的docker的ip，目标ip不是172.7.0.0/16段，网络发包不从docker0设备出站的，才进行SNAT转换
iptables -t nat -I POSTROUTING -s 172.7.21.0/24 ! -d 172.7.0.0/16 ! -o docker0 -j MASQUERADE
保存规则
iptables-save > /etc/sysconfig/iptables
删除无用的过滤规则
iptables -t filter -D INPUT -j REJECT --reject-with icmp-host-prohibited
iptables -t filter -D FORWARD -j REJECT --reject-with icmp-host-prohibited
容器与容器交互，每次都iptables做snat转换，但容器之间是同一个2类网络
docker与docker之间要坦诚相见，22也做类似的动作，就都不需要做snat转换了
11.coreDns
服务发现核心依赖的组件
- 服务发现，就是服务（应用）之间相互定位的过程
- 服务发现并非云计算时代独有的，传统单体架构也会用到，一下应用场景，更需要服务发现
- 服务的动态性强（今天服务还在10.4.7.21上，后台就跑了10.4.7.22上）
- 服务更新发布频繁（小步快跑，先实现，再优化）
- 服务支持自动伸缩（扩容）
在k8s集群里，pod的ip是不断变化的，如何“以不变应万变”？
- 抽象出了service概念，通过标签选择器，关联一组pod
- 抽象集群网络，通过相对固定集群ip，使服务接入点固定
如何自动关联service资源的名称和集群网络ip呢，从而达到服务被集群自动发现呢
- 传统DNS模型：jdss7-21.host.com -> 10.4.7.21
- 能否在k8s建立这样的模型：nginx-ds -> 192.168.0.5
11.1 安装部署coreDns（通过交付容器的方式交付服务）
11.1.1 部署k8s内网资源配置清单http服务
运维主机7-200上，配置一个虚拟主机，提供k8s统一的资源配置清单访问入口
/etc/nginx/conf.d/k8s-yaml.od.com.conf
server {
listen 80;
server_name k8s-yaml.od.com;
location / {
autoindex on;
default_type text/plain;
root /data/k8s-yaml;
}
}
nginx -t
nginx -s reload
然后到dns服务器7-11机器上修改dns配置用于解析k8s-yaml.od.com域名
vim /var/named/od.com.zone
添加内容k8s-yaml A 10.4.7.200
并序列化后滚动一位
重启dns服务systemctl restart named
验证解析是否生效dig -t -A k8s-yaml.od.com @10.4.7.11 +short
11.1.2 部署coreDns
不下载二进制包了，以容器的方式交付到k8s容器里
选择1.6.1版本
jdss7-200机器上
cd /data/k8s-yaml/coredns
docker pull docker.io/coredns/coredns:1.6.1
docker images | grep coredns
然后打标签，推送到自己的harbor私服中
准备4个yaml文件在jdss7-200机器上
rbac.yaml //权限
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
labels:
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: Reconcile
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
addonmanager.kubernetes.io/mode: EnsureExists
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
cm.yaml //ConfigMap
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
errors
log
health
ready
kubernetes cluster.local 192.168.0.0/16
forward . 10.4.7.11
cache 30
loop
reload
loadbalance
}
dp.yaml // pod控制器
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: coredns
kubernetes.io/name: "CoreDNS"
spec:
replicas: 1
selector:
matchLabels:
k8s-app: coredns
template:
metadata:
labels:
k8s-app: coredns
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
containers:
- name: coredns
image: harbor.od.com/public/coredns:v1.6.1
args:
- -conf
- /etc/coredns/Corefile
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
svc.yaml // service
apiVersion: v1
kind: Service
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: coredns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: coredns
clusterIP: 192.168.0.2
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
- name: metrics
port: 9153
protocol: TCP
kubectl apply -f http://k8s-yaml.od.com/coredns/rbac.yaml
kubectl apply -f http://k8s-yaml.od.com/coredns/cm.yaml
kubectl apply -f http://k8s-yaml.od.com/coredns/dp.yaml
kubectl apply -f http://k8s-yaml.od.com/coredns/svc.yaml
kubectl get all -n kube-system
11.2 验证coreDns
[root@jdss7-21 ~]# dig -t A jdss7-21.host.com @192.168.0.2 +short
10.4.7.21
给pod控制器nginx-dp创建一个service
kubectl expose deployment nginx-dp-5dfc689474-t98fx --port=80 -n kube-public
kubectl get service -n kube-public
使用fdn全域名，coreDns来解析，服务名-》具体集群ip的
// service名为nginx-dp
// kube-public是namespace
// svc是service的缩写
// cluster集群
// local 本地后缀
[root@jdss7-21 ~]# dig -t A nginx-dp.kube-public.svc.cluster.local @192.168.0.2 +short
192.168.5.14
[root@jdss7-21 ~]# dig -t A nginx-dp.kube-public.svc.cluster.local. @192.168.0.2 +short
192.168.5.14
只有集群内部的pod里才能使用短域名直接到对端nginx-dp.kube-public
是因为dns配置文件中使用了search 短域名匹配规则
12.服务暴露
集群内部通过服务名去找
集群外怎么找？nginx-dp.kube-public.svc.cluster.local 是不通的
(coreDns只在集群内部生效，外部不生效)
12.1 nodeport模式
12.1.1 修改kube-proxy使用iptables模式，而不是ipvs模式，nodeport的service演示
- 7.21和7.22的计算节点上修改kube-proxy使用iptables模式
vim /opt/kubernets/server/bin/kube-proxy.sh
supervisorctl restart kube-proxy - 7.21和7.22的计算节点上删除ipvs的计算规则
12.1.2 nginx-ds的service使用nodeport方式暴露外面（pod里的80端口映射到宿主机的8000端口）
12.1.3 实际是写iptables规则
12.2 ingress模式
专门暴露7层应用，特指http和https协议（https还比较麻烦，建议暴露http就可以了）
www.od.com/abc -> tomcat
www.od.com/edf -> nodejs
www.od.com/qwe -> php
ingress规则可以定义一个www.od.com的域名支持，根据不同的url，分发到不同的service
实际的流量调度是从集群外面的用户请求->ingress->根据不同的域名及路径的匹配规则抛给不同的service
service再通过label selector去找到pod，真正提供服务的是pod
kube-proxy是service的一个实现
ingress其实就是简化版的nginx+一个go脚本
常用的ingress控制器的实现软件
- Ingress-nginx
- HAProxy
- Tracfik
12.2.1 部署Tracfik
以资源配置清单，也就是pod启动的方式部署tracfik
- 准备好镜像
7.200机器/data/k8s-yaml目录
# mkdir -p /data/k8s-yaml/traefik
# cd /data/k8s-yaml/traefik
// 建议使用1.7.2版本
# docker pull traefik:v1.7.2-alpine
# docker images | grep traefik
# docker tag add5fac61ae5 harbor.od.com/public/traefik:v1.7.2
# docker push harbor.od.com/public/traefik:v1.7.2
- 准备好资源配置清单
rbac.yaml（鉴权）
apiVersion: v1
kind: ServiceAccount
metadata:
name: traefik-ingress-controller
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRole
metadata:
name: traefik-ingress-controller
rules:
- apiGroups:
- ""
resources:
- services
- endpoints
- secrets
verbs:
- get
- list
- watch
- apiGroups:
- extensions
resources:
- ingresses
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
name: traefik-ingress-controller
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: traefik-ingress-controller
subjects:
- kind: ServiceAccount
name: traefik-ingress-controller
namespace: kube-system
ds.yaml(daemonSet控制器，每个宿主机都要起一个pod)
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: traefik-ingress
namespace: kube-system
labels:
k8s-app: traefik-ingress
spec:
template:
metadata:
labels:
k8s-app: traefik-ingress
name: traefik-ingress
spec:
serviceAccountName: traefik-ingress-controller
terminationGracePeriodSeconds: 60
containers:
- image: harbor.od.com/public/traefik:v1.7.2
name: traefik-ingress
ports:
- name: controller
containerPort: 80
hostPort: 81 // 映射到宿主机的81端口
- name: admin-web
containerPort: 8080
securityContext:
capabilities:
drop:
- ALL
add:
- NET_BIND_SERVICE
args:
- --api
- --kubernetes
- --logLevel=INFO
- --insecureskipverify=true
- --kubernetes.endpoint=https://10.4.7.10:7443
- --accesslog
- --accesslog.filepath=/var/log/traefik_access.log/traefik_access
- --traefiklog
- --traefiklog.filepath=/var/log/traefik.log
- --metrics.prometheus
service.yaml（服务）
apiVersion: v1
kind: Service
metadata:
name: traefik-ingress-service
namespace: kube-system
spec:
selector:
k8s-app: traefik-ingress
ports:
- protocol: TCP
port: 80
name: controller
- protocol: TCP
port: 8080
name: admin-web
ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: traefik-web-ui
namespace: kube-system
annotations:
kubernetes.io/ingress.class: traefik
spec:
rules:
- host: traefik.od.com
http:
paths:
- path: /
backend:
serviceName: traefik-ingress-service
servicePort: 8080
- 使资源配置清单文件生效
kubectl apply -f http://k8s-yaml.od.com/traefik/rbac.yaml
kubectl apply -f http://k8s-yaml.od.com/traefik/ds.yaml
kubectl apply -f http://k8s-yaml.od.com/traefik/service.yaml
kubectl apply -f http://k8s-yaml.od.com/traefik/ingress.yaml
kubectl get pods -n kube-system
kubectl describe pod traefik-ingress-qjp62
(重启kubectl)
- 配置反代（10.4.7.11 ，10.4.7.12机器上od.com.conf）
upstream default_backend_traefik {
server 10.4.7.21:81 max_fails=3 fail_timeout=10s;
server 10.4.7.22:81 max_fails=3 fail_timeout=10s;
}
server {
server_name *.od.com;
location / {
proxy_pass http://default_backend_traefik;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
-
dns添加A记录
traefik.od.com -
展示
原创:做时间的朋友
