第五章部署master主控节点

一、部署etcd集群

1.1 集群规划

主机名		角色		IP
hdss7-12	leader		10.4.7.12
hdss7-21	follow		10.4.7.21
hdss7-22	follow		10.4.7.22

本例部署以10.4.7.12为例，另外两台安装类似

1.2 签发证书

在10.4.7.200上操作
创建基于根证书的config配置文件

[root@hdss7-200 ~]# vim /opt/certs/ca-config.json
{
    "signing": {
        "default": {
            "expiry": "175200h"
        },
        "profiles": {
            "server": {
                "expiry": "175200h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "server auth"
                ]
            },
            "client": {
                "expiry": "175200h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "client auth"
                ]
            },
            "peer": {
                "expiry": "175200h",
                "usages": [
                    "signing",
                    "key encipherment",
                    "server auth",
                    "client auth"
                ]
            }
        }
    }
}
注释：
Server certificate：服务端使用，客户端以此验证服务端身份，例如docker服务端，kube-apiserver服务端；
Client certificate：客户端使用，用于服务端验证客户端身份，etcdctl、etcd-proxy、fleetctl、docker客户端；
Peer certificate：双向证书，用于etcd集群之间相互通信。

1.3 创建生成自签证书签名请求（csr）的JSON配置文件

[root@hdss7-200 ~]# vim /opt/certs/etcd-peer-csr.json
{
    "CN": "k8s-etcd",
    "hosts": [
        "10.4.7.11",
        "10.4.7.12",
        "10.4.7.21",
        "10.4.7.22"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "od",
            "OU": "ops"
        }
    ]
}
注意：重点在hosts上，将所有可能的etcd服务器添加到host列表，不能使用网段，新增etcd服务器需要重新签发证书

1.4 签发证书

[root@hdss7-200 harbor]# cd /opt/certs/
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=peer etcd-peer-csr.json |cfssl-json -bare etcd-peer
[root@hdss7-200 certs]# ls etcd*
etcd-peer.csr  etcd-peer-csr.json  etcd-peer-key.pem  etcd-peer.pem

1.5 安装etcd服务

在10.4.7.12/21/22上部署，以12为例

[root@hdss7-12 ~]# mkdir /opt/src
[root@hdss7-12 ~]# cd /opt/src/
[root@hdss7-12 src]# curl -L https://github.com/coreos/etcd/releases/download/v3.3.1/etcd-v3.3.1-linux-amd64.tar.gz -o etcd-v3.3.1-linux-amd64.tar.gz
[root@hdss7-12 src]# tar -zxvf etcd-v3.3.1-linux-amd64.tar.gz -C /opt/etcd-v3.3.1
[root@hdss7-12 src]# ln -s /opt/etcd-v3.3.1 /opt/etcd
[root@hdss7-12 src]# ll /opt/
总用量 8
lrwxrwxrwx 1 root root   16 6月   8 20:36 etcd -> /opt/etcd-v3.3.1
drwxr-xr-x 5 etcd etcd 4096 7月   9 20:40 etcd-v3.3.1
drwxr-xr-x 2 root root 4096 7月   9 20:36 src
创建目录
[root@hdss7-12 src]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server

1.6 下发证书

将10.4.7.200上生成的证书分配到etcd集群服务器上

[root@hdss7-200 certs]# for i in 12 21 22;do scp ca.pem etcd-peer.pem etcd-peer-key.pem hdss7-${i}:/opt/etcd/certs/ ;done

1.7 创建etcd启动脚本

[root@hdss7-12 src]# vim /opt/etcd/etcd-server-startup.sh
#!/bin/sh
# listen-peer-urls etcd节点之间通信端口
# listen-client-urls 客户端与etcd通信端口
# quota-backend-bytes 配额大小
# 需要修改的参数：name,listen-peer-urls,listen-client-urls,initial-advertise-peer-urls,advertise-client-urls
WORK_DIR=$(dirname $(readlink -f $0))
[ $? -eq 0 ] && cd $WORK_DIR || exit

/opt/etcd/etcd --name etcd-server-7-12 \
    --data-dir /data/etcd/etcd-server \
    --listen-peer-urls https://10.4.7.12:2380 \
    --listen-client-urls https://10.4.7.12:2379,http://127.0.0.1:2379 \
    --quota-backend-bytes 8000000000 \
    --initial-advertise-peer-urls https://10.4.7.12:2380 \
    --advertise-client-urls https://10.4.7.12:2379,http://127.0.0.1:2379 \
    --initial-cluster  etcd-server-7-12=https://10.4.7.12:2380,etcd-server-7-21=https://10.4.7.21:2380,etcd-server-7-22=https://10.4.7.22:2380 \
    --ca-file ./certs/ca.pem \
    --cert-file ./certs/etcd-peer.pem \
    --key-file ./certs/etcd-peer-key.pem \
    --client-cert-auth  \
    --trusted-ca-file ./certs/ca.pem \
    --peer-ca-file ./certs/ca.pem \
    --peer-cert-file ./certs/etcd-peer.pem \
    --peer-key-file ./certs/etcd-peer-key.pem \
    --peer-client-cert-auth \
    --peer-trusted-ca-file ./certs/ca.pem \
--log-output stdout
[root@hdss7-12 src]# chmod +x /opt/etcd/etcd-server-startup.sh
[root@hdss7-12 src]# chown -R etcd.etcd /opt/etcd/ /data/etcd /data/logs/etcd-server

1.8 安装后台管理工具supervisor

[root@hdss7-12 src]# yum -y install supervisor
[root@hdss7-12 src]# systemctl start supervisord ; systemctl enable supervisord
[root@hdss7-12 src]# vim /etc/supervisord.d/etcd-server.ini
[program:etcd-server-7-12]
command=/opt/etcd/etcd-server-startup.sh              ; the program (relative uses PATH, can take args)
numprocs=1                                            ; number of processes copies to start (def 1)
directory=/opt/etcd                                   ; directory to cwd to before exec (def no cwd)
autostart=true                                        ; start at supervisord start (default: true)
autorestart=true                                      ; retstart at unexpected quit (default: true)
startsecs=30                                          ; number of secs prog must stay running (def. 1)
startretries=3                                        ; max # of serial start failures (default 3)
exitcodes=0,2                                         ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT                                       ; signal used to kill process (default TERM)
stopwaitsecs=10                                       ; max num secs to wait b4 SIGKILL (default 10)
user=etcd                                             ; setuid to this UNIX account to run the program
redirect_stderr=true                                  ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/etcd-server/etcd.stdout.log ; stdout log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB                          ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=5                              ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB                           ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false                           ; emit events on stdout writes (default false)
[root@hdss7-12 src]# supervisorctl update
etcd-server-7-12: added process group/
[root@hdss7-12 src]# supervisorctl start etcd-server-7-12
etcd-server-7-12: started

1.9 查看集群服务状态

[root@hdss7-12 src]#  supervisorctl status
etcd-server-7-12                 RUNNING   pid 2270, uptime 0:00:38
查看etcd后台端口2379与2380
查看器群状态，如下是集群未全部启动
[root@hdss7-12 src]# /opt/etcd/etcdctl member list
client: etcd cluster is unavailable or misconfigured; error #0: client: endpoint http://127.0.0.1:2379 exceeded header timeout
; error #1: dial tcp 127.0.0.1:4001: getsockopt: connection refused
如下是起来两个节点的时候
[root@hdss7-12 src]# /opt/etcd/etcdctl member list
988139385f78284:	 name=etcd-server-7-22 peerURLs=https://10.4.7.22:2380 clientURLs= isLeader=false
5a0ef2a004fc4349: name=etcd-server-7-21 peerURLs=https://10.4.7.21:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.12:2379 isLeader=false
f4a0cb0a765574a8: name=etcd-server-7-12 peerURLs=https://10.4.7.12:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.12:2379 isLeader=true
全部起来的情况
[root@hdss7-12 src]# /opt/etcd/etcdctl member list
988139385f78284: name=etcd-server-7-22 peerURLs=https://10.4.7.22:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.12:2379 isLeader=false
5a0ef2a004fc4349: name=etcd-server-7-21 peerURLs=https://10.4.7.21:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.12:2379 isLeader=false
f4a0cb0a765574a8: name=etcd-server-7-12 peerURLs=https://10.4.7.12:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.12:2379 isLeader=true
随着etcd服务的重启会发生变化
查看健康状态
[root@hdss7-12 src]# /opt/etcd/etcdctl cluster-health
member 988139385f78284 is healthy: got healthy result from http://127.0.0.1:2379
member 5a0ef2a004fc4349 is healthy: got healthy result from http://127.0.0.1:2379
member f4a0cb0a765574a8 is healthy: got healthy result from http://127.0.0.1:2379
cluster is healthy
启停方式
[root@hdss7-12 src]# supervisorctl stop etcd-server-7-12
[root@hdss7-12 src]# supervisorctl start etcd-server-7-12
[root@hdss7-12 src]# supervisorctl restart etcd-server-7-12
[root@hdss7-12 src]# supervisorctl status etcd-server-7-12

二、部署kube-apiserver集群

2.1 集群规划

部署以10.4.7.21为例，10.4.7.22部署类似

主机名		角色			IP
hdss7-21		kube-apiserver	10.4.7.21
hdss7-22		kube-apiserver	10.4.7.22

2.2 下载kubernetes服务端

aipserver 涉及的服务器：10.4.7.21,10.4.7.22
下载 kubernetes 二进制版本包
进入kubernetes的github页面: https://github.com/kubernetes/kubernetes
进入tags页签: https://github.com/kubernetes/kubernetes/tags
选择要下载的版本: https://github.com/kubernetes/kubernetes/releases/tag/v1.15.2
点击 CHANGELOG-${version}.md 进入说明页面:
https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.15.md#downloads-for-v1152
下载Server Binaries: https://dl.k8s.io/v1.15.2/kubernetes-server-linux-amd64.tar.gz

[root@hdss7-21 ~]# cd /opt/src
[root@hdss7-21 src]# wget https://dl.k8s.io/v1.15.2/kubernetes-server-linux-amd64.tar.gz
[root@hdss7-21 src]# tar -zxvf kubernetes-server-linux-amd64.tar.gz 
[root@hdss7-21 src]# mv kubernetes /opt/kubernetes-v1.15.2
添加软连接
[root@hdss7-21 src]# ln -s /opt/kubernetes-v1.15.2 /opt/kubernetes
[root@hdss7-21 src]# ll /opt/kubernetes
lrwxrwxrwx 1 root root 23 6月   8 21:17 /opt/kubernetes -> /opt/kubernetes-v1.15.
[root@hdss7-21 src]# cd /opt/kubernetes
删除源码文件
[root@hdss7-21 kubernetes]# rm -f kubernetes-src.tar.gz
删除docker镜像文件，留下可执行文件
[root@hdss7-21 kubernetes]# cd server/bin/
[root@hdss7-21 bin]# rm -f *.tar *_tag
[root@hdss7-21 bin]# ll
总用量 903324
-rwxr-xr-x 1 root root  42809984 12月 11 2019 apiextensions-apiserver
-rwxr-xr-x 1 root root 100001376 12月 11 2019 cloud-controller-manager
-rwxr-xr-x 1 root root 211376176 12月 11 2019 hyperkube
-rwxr-xr-x 1 root root  39603488 12月 11 2019 kubeadm
-rwxr-xr-x 1 root root 167161088 12月 11 2019 kube-apiserver
-rwxr-xr-x 1 root root 115177920 12月 11 2019 kube-controller-manager
-rwxr-xr-x 1 root root  43119424 12月 11 2019 kubectl
-rwxr-xr-x 1 root root 128116560 12月 11 2019 kubelet
-rwxr-xr-x 1 root root  36697728 12月 11 2019 kube-proxy
-rwxr-xr-x 1 root root  39266496 12月 11 2019 kube-scheduler
-rwxr-xr-x 1 root root   1648224 12月 11 2019 mounter
创建证书目录
[root@hdss7-21 bin]# mkdir certs

2.3 在10.4.7.200服务器上生成并签发证书

签发client证书，apiserver和etcd通行证书

[root@hdss7-200 ~]# cd /opt/certs/
[root@hdss7-200 certs]# vim /opt/certs/client-csr.json
{
    "CN": "k8s-node",
    "hosts": [
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "od",
            "OU": "ops"
        }
    ]
}
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client
[root@hdss7-200 certs]# ls client*
client.csr  client-csr.json  client-key.pem  client.pem

签发server证书
apiserver和k8s组件通信证书

hosts中将所有可能作为apiserver的ip添加进去，VIP 10.4.7.10 也要加入
[root@hdss7-200 certs]# vim /opt/certs/apiserver-csr.json
{
    "CN": "k8s-apiserver",
    "hosts": [
        "127.0.0.1",
        "192.168.0.1",
        "kubernetes.default",
        "kubernetes.default.svc",
        "kubernetes.default.svc.cluster",
        "kubernetes.default.svc.cluster.local",
        "10.4.7.10",
        "10.4.7.21",
        "10.4.7.22",
        "10.4.7.23"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "od",
            "OU": "ops"
        }
    ]
}
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver
[root@hdss7-200 certs]# ls apiserver*
apiserver.csr  apiserver-csr.json  apiserver-key.pem  apiserver.pem
签发证书
[root@hdss7-200 certs]# for i in 21 22;do echo hdss7-$i;scp apiserver-key.pem apiserver.pem ca-key.pem ca.pem client-key.pem client.pem hdss7-$i:/opt/kubernetes/server/bin/certs/;done

2.4 配置apiserver日志审计

apiserver涉及的服务器：10.4.7.21,10.4.7.22，此处以21为例

[root@hdss7-21 bin]# mkdir /opt/kubernetes/conf
[root@hdss7-21 bin]# vim /opt/kubernetes/conf/audit.yaml
打开文件后设置:set paste避免粘贴的时候自动缩进
apiVersion: audit.k8s.io/v1beta1 # This is required.
kind: Policy
# Don't generate audit events for all requests in RequestReceived stage.
omitStages:
  - "RequestReceived"
rules:
  # Log pod changes at RequestResponse level
  - level: RequestResponse
    resources:
    - group: ""
      # Resource "pods" doesn't match requests to any subresource of pods,
      # which is consistent with the RBAC policy.
      resources: ["pods"]
  # Log "pods/log", "pods/status" at Metadata level
  - level: Metadata
    resources:
    - group: ""
      resources: ["pods/log", "pods/status"]

  # Don't log requests to a configmap called "controller-leader"
  - level: None
    resources:
    - group: ""
      resources: ["configmaps"]
      resourceNames: ["controller-leader"]

  # Don't log watch requests by the "system:kube-proxy" on endpoints or services
  - level: None
    users: ["system:kube-proxy"]
    verbs: ["watch"]
    resources:
    - group: "" # core API group
      resources: ["endpoints", "services"]

  # Don't log authenticated requests to certain non-resource URL paths.
  - level: None
    userGroups: ["system:authenticated"]
    nonResourceURLs:
    - "/api*" # Wildcard matching.
    - "/version"

  # Log the request body of configmap changes in kube-system.
  - level: Request
    resources:
    - group: "" # core API group
      resources: ["configmaps"]
    # This rule only applies to resources in the "kube-system" namespace.
    # The empty string "" can be used to select non-namespaced resources.
    namespaces: ["kube-system"]

  # Log configmap and secret changes in all other namespaces at the Metadata level.
  - level: Metadata
    resources:
    - group: "" # core API group
      resources: ["secrets", "configmaps"]

  # Log all other resources in core and extensions at the Request level.
  - level: Request
    resources:
    - group: "" # core API group
    - group: "extensions" # Version of group should NOT be included.

  # A catch-all rule to log all other requests at the Metadata level.
  - level: Metadata
    # Long-running requests like watches that fall under this rule will not
    # generate an audit event in RequestReceived.
    omitStages:
      - "RequestReceived"

2.5 配置启动脚本

[root@hdss7-21 bin]#  vim /opt/kubernetes/server/bin/kube-apiserver-startup.sh
#!/bin/bash
# 这里需要修改 --etcd-servers https://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379 分别三台etcd的地址

WORK_DIR=$(dirname $(readlink -f $0))
[ $? -eq 0 ] && cd $WORK_DIR || exit

/opt/kubernetes/server/bin/kube-apiserver \
    --apiserver-count 2 \
    --audit-log-path /data/logs/kubernetes/kube-apiserver/audit-log \
    --audit-policy-file ../../conf/audit.yaml \
    --authorization-mode RBAC \
    --client-ca-file ./certs/ca.pem \
    --requestheader-client-ca-file ./certs/ca.pem \
    --enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota \
    --etcd-cafile ./certs/ca.pem \
    --etcd-certfile ./certs/client.pem \
    --etcd-keyfile ./certs/client-key.pem \
    --etcd-servers https://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379 \
    --service-account-key-file ./certs/ca-key.pem \
    --service-cluster-ip-range 192.168.0.0/16 \
    --service-node-port-range 3000-29999 \
    --target-ram-mb=1024 \
    --kubelet-client-certificate ./certs/client.pem \
    --kubelet-client-key ./certs/client-key.pem \
    --log-dir  /data/logs/kubernetes/kube-apiserver \
    --tls-cert-file ./certs/apiserver.pem \
    --tls-private-key-file ./certs/apiserver-key.pem \
--v 2
[root@hdss7-21 bin]# chmod +x /opt/kubernetes/server/bin/kube-apiserver-startup.sh

2.6 配置supervisor启动配置

[root@hdss7-21 bin]# vim /etc/supervisord.d/kube-apiserver.ini
[program:kube-apiserver-7-21]
command=/opt/kubernetes/server/bin/kube-apiserver-startup.sh
numprocs=1
directory=/opt/kubernetes/server/bin
autostart=true
autorestart=true
startsecs=30
startretries=3
exitcodes=0,2
stopsignal=QUIT
stopwaitsecs=10
user=root
redirect_stderr=true
stdout_logfile=/data/logs/kubernetes/kube-apiserver/apiserver.stdout.log
stdout_logfile_maxbytes=64MB
stdout_logfile_backups=5
stdout_capture_maxbytes=1MB
stdout_events_enabled=false
创建目录
[root@hdss7-21 bin]# mkdir -p /data/logs/kubernetes/kube-apiserver/
[root@hdss7-21 bin]# supervisorctl update
kube-apiserver-7-21: added process group
当启动有问题，出现如下情况时，可以查看启动输出文件
[root@hdss7-21 bin]# supervisorctl status kube-apiserver-7-21
kube-apiserver-7-21              BACKOFF   Exited too quickly (process log may have details)
[root@hdss7-21 bin]# vim /data/logs/kubernetes/kube-apiserver/apiserver.stdout.log
修改好后重新启动
[root@hdss7-21 bin]# supervisorctl restart kube-apiserver-7-21
[root@hdss7-21 bin]# supervisorctl status kube-apiserver-7-21
kube-apiserver-7-21              RUNNING   pid 4538, uptime 0:00:41
启停apiserver命令如下
[root@hdss7-21 bin]# supervisorctl start kube-apiserver-7-21 
[root@hdss7-21 bin]# supervisorctl stop kube-apiserver-7-21 
[root@hdss7-21 bin]# supervisorctl restart kube-apiserver-7-21 
[root@hdss7-21 bin]# supervisorctl status kube-apiserver-7-21

2.7 查看进程

一个是对外6443端口，一个是回环端口8080

[root@hdss7-21 bin]#  netstat -lntp|grep api
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      4542/kube-apiserver
tcp6       0      0 :::6443                 :::*                    LISTEN      4542/kube-apiserver
同样在10.4.7.22上部署apiserver服务

2.8 配置apiserver L4代理

10.4.7.11和10.4.7.22上操作，利用keepalived创建VIP10.4.7.10

[root@hdss7-11 ~]# yum -y intstall nginx
[root@hdss7-11 ~]# vim /etc/nginx/nginx.conf
# 末尾加上以下内容，stream 只能加在 main 中
# 此处只是简单配置下nginx，实际生产中，建议进行更合理的配置
stream {
    log_format proxy '$time_local|$remote_addr|$upstream_addr|$protocol|$status|'
                     '$session_time|$upstream_connect_time|$bytes_sent|$bytes_received|'
                     '$upstream_bytes_sent|$upstream_bytes_received' ;

    upstream kube-apiserver {
        server 10.4.7.21:6443     max_fails=3 fail_timeout=30s;
        server 10.4.7.22:6443     max_fails=3 fail_timeout=30s;
    }
    server {
        listen 7443;
        proxy_connect_timeout 2s;
        proxy_timeout 900s;
        proxy_pass kube-apiserver;
        access_log /var/log/nginx/proxy.log proxy;
    }
}

问题处理：
如果yum安装nginx可能会出现如下问题，这是因为版本升级引起的，我的是nginx1.20.1，没有找到nginxstream模块

[root@hdss7-12 ~]# nginx -t
nginx: [emerg] dlopen() "/usr/lib64/nginx/modules/ngx_stream_module.so" failed (/usr/lib64/nginx/modules/ngx_stream_module.so: cannot open shared object file: No such file or directory) in /etc/nginx/nginx.conf:4
安装一下stream模块就好
[root@hdss7-11 modules]# yum list|grep nginx|grep stream
nginx-mod-stream.x86_64                     1:1.20.1-2.el7             @epel
[root@hdss7-11 modules]# yum -y install nginx-mod-stream.x86_64
再次检查
[root@hdss7-11 modules]# nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

测试

[root@hdss7-21 bin]# systemctl start nginx; systemctl enable nginx
[root@hdss7-21 bin]# curl 127.0.0.1:7443
Client sent an HTTP request to an HTTPS server.
多测试几次，出现轮询效果
[root@localhost ~]# cat /var/log/nginx/proxy.log
08/Jun/2021:22:16:18 +0800|127.0.0.1|10.4.7.21:6443|TCP|200|0.001|0.000|76|78|78|76
08/Jun/2021:22:16:23 +0800|127.0.0.1|10.4.7.22:6443|TCP|200|0.003|0.002|76|78|78|76
08/Jun/2021:22:16:23 +0800|127.0.0.1|10.4.7.21:6443|TCP|200|0.001|0.000|76|78|78|76
08/Jun/2021:22:16:24 +0800|127.0.0.1|10.4.7.22:6443|TCP|200|0.003|0.002|76|78|78|76

2.9 部署keepalived

在10.4.7.11,12上操作，实现nginx高可用

安装keepalived（实验环境直接使用yum安装）
[root@hdss7-21 ~]# yum -y install keepalived
编辑nginx监听脚本
[root@hdss7-11 ~]# vim /etc/keepalived/check_port.sh
#!/bin/bash
#keepalived监控端口脚本
#使用方法：
#在keepalived的配置文件中
#vrrp_script check_port{#创建一个vrrp_script脚本，检查配置
#       script "/etc/keepalived/check_port.sh 7443" #配置监听的端口
#       interval 2 #检查脚本的频率，单位（秒）
#}
CHK_PORT=$1
if [ -n "$CHK_PORT" ];then
        PORT_PROCESS=`ss -nlt|grep $CHK_PORT|wc -l`
        if [ $PORT_PROCESS -eq 0 ];then
                echo "Port $CHK_PORT Is Not Used,End"
                exit 1
        fi
else
        echo "Check Port Can Be Empty!"
fi
[root@hdss7-11 ~]# chmod +x /etc/keepalived/check_port.sh

编辑keeaplived主配置，设置nopreempt非抢占模式
10.4.7.11上

[root@hdss7-11 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
    router_id 10.4.7.11
    script_user root
    enable_script_security
}
vrrp_script chk_nginx {
    script "/etc/keepalived/check_port.sh 7443"
    interval 2
    weight -20
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    mcast_src_ip 10.4.7.11
    nopreempt
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        chk_nginx
    }
    virtual_ipaddress {
        10.4.7.10
    }
}

10.4.7.12上

[root@hdss7-21 ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
    router_id 10.4.7.12
    script_user root
    enable_script_security
}
vrrp_script chk_nginx {
    script "/etc/keepalived/check_port.sh 7443"
    interval 2
    weight -20
}
vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 51
    mcast_src_ip 10.4.7.12
    priority 90
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {
        chk_nginx
    }
    virtual_ipaddress {
        10.4.7.10
    }
}

启动并加入开机自启

[root@hdss7-11 ~]# systemctl start keepalived && systemctl enable keepalived
Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service.
[root@hdss7-11 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:ca:98:73 brd ff:ff:ff:ff:ff:ff
    inet 10.4.7.11/24 brd 10.4.7.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet 10.4.7.10/32 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::66c4:334d:3cb1:9096/64 scope link tentative noprefixroute dadfailed
       valid_lft forever preferred_lft forever
    inet6 fe80::e4c6:edb7:e158:d84b/64 scope link noprefixroute
       valid_lft forever preferred_lft forever

测试
关闭10.4.7.11上的nginx后再重启，观察情况VIP漂移只10.4.7.12上后不会再漂移回来，因为我们给的是非抢占模式的配置

三、部署controller-manager

Controller-manager设置只为调用当前主机的apiserver，走127.0.0.1网卡，因此不需要配置ssl证书
部署以10.4.7.21为例

3.1 集群规划

主机名					角色				ip
hdss7-21.host.com		controller-manager		10.4.7.21
hdss7-22.host.com		controller-manager		10.4.7.22

3.2 创建启动脚本

[root@hdss7-21 ~]# vim /opt/kubernetes/server/bin/kube-controller-manager-startup.sh
#!/bin/sh
WORK_DIR=$(dirname $(readlink -f $0))
[ $? -eq 0 ] && cd $WORK_DIR || exit

/opt/kubernetes/server/bin/kube-controller-manager \
    --cluster-cidr 172.7.0.0/16 \
    --leader-elect true \
    --log-dir /data/logs/kubernetes/kube-controller-manager \
    --master http://127.0.0.1:8080 \
    --service-account-private-key-file ./certs/ca-key.pem \
    --service-cluster-ip-range 192.168.0.0/16 \
    --root-ca-file ./certs/ca.pem \
    --v 2

3.3 修改文件权限，创建目录

[root@hdss7-21 ~]# chmod +x /opt/kubernetes/server/bin/kube-controller-manager-startup.sh
[root@hdss7-21 ~]# mkdir -p /data/logs/kubernetes/kube-controller-manager

3.4 创建supervisor配置

[root@hdss7-21 ~]# vim /etc/supervisord.d/kube-controller-manager.ini
[program:kube-controller-manager-7-21]
command=/opt/kubernetes/server/bin/kube-controller-manager-startup.sh             ; the program (relative uses PATH, can take args)
numprocs=1                                                                        ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin                                              ; directory to cwd to before exec (def no cwd)
autostart=true                                                                    ; start at supervisord start (default: true)
autorestart=true                                                                  ; retstart at unexpected quit (default: true)
startsecs=30                                                                      ; number of secs prog must stay running (def. 1)
startretries=3                                                                    ; max # of serial start failures (default 3)
exitcodes=0,2                                                                     ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT                                                                   ; signal used to kill process (default TERM)
stopwaitsecs=10                                                                   ; max num secs to wait b4 SIGKILL (default 10)
user=root                                                                         ; setuid to this UNIX account to run the program
redirect_stderr=true                                                              ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-controller-manager/controller.stdout.log  ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB                                                      ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4                                                          ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB                                                       ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false                                                       ; emit events on stdout writes (default false)

3.5 启动服务并检查

[root@hdss7-21 ~]# supervisorctl update
kube-controller-manager-7-21: added process group
查看状态
[root@hdss7-21 ~]# supervisorctl status
etcd-server-7-21                 RUNNING   pid 1404, uptime 0:23:30
kube-apiserver-7-21              RUNNING   pid 1419, uptime 0:23:29
kube-controller-manager-7-21     RUNNING   pid 2153, uptime 0:00:43

3.6 安装部署所有集群规划的主机

同样部署好10.4.7.22上的服务

四、部署kube-scheduler

Kube-scheduler设置只为调用当前本机的apiserver，走127.0.0.1网卡，因此不需要配置ssl证书。（如果apiserver、controller-manager和scheduler分别部署在不同的机器上，那么他们就需要分别部署client.pem和client-key.pem证书，因为我们这三个组建集群都是用的相同的主机，所以共用一套证书就可以了）
以10.4.7.21部署为例

4.1 集群规划

主机名					角色				ip
hdss7-21.host.com		kube-scheduler		10.4.7.21
hdss7-22.host.com		kube-scheduler		10.4.7.22

4.2 创建启动脚本

[root@hdss7-21 ~]# vim /opt/kubernetes/server/bin/kube-scheduler-startup.sh
#!/bin/sh
WORK_DIR=$(dirname $(readlink -f $0))
[ $? -eq 0 ] && cd $WORK_DIR || exit

/opt/kubernetes/server/bin/kube-scheduler \
    --leader-elect  \
    --log-dir /data/logs/kubernetes/kube-scheduler \
    --master http://127.0.0.1:8080 \
    --v 2

4.3 调整文件权限，创建目录

[root@hdss7-21 ~]# chmod +x /opt/kubernetes/server/bin/kube-scheduler-startup.sh
[root@hdss7-21 ~]# mkdir -p /data/logs/kubernetes/kube-scheduler

4.4 创建supervisor配置

[root@hdss7-21 ~]# vim /etc/supervisord.d/kube-scheduler.ini
[program:kube-scheduler-7-21]
command=/opt/kubernetes/server/bin/kube-scheduler-startup.sh
numprocs=1
directory=/opt/kubernetes/server/bin
autostart=true
autorestart=true
startsecs=30
startretries=3
exitcodes=0,2
stopsignal=QUIT
stopwaitsecs=10
user=root
redirect_stderr=true
stdout_logfile=/data/logs/kubernetes/kube-scheduler/scheduler.stdout.log
stdout_logfile_maxbytes=64MB
stdout_logfile_backups=4
stdout_capture_maxbytes=1MB
stdout_events_enabled=false

4.5 启动服务并检查

[root@hdss7-21 ~]# supervisorctl update
kube-scheduler-7-21: added process group
[root@hdss7-21 ~]# supervisorctl status
etcd-server-7-21                 RUNNING   pid 1404, uptime 0:32:54
kube-apiserver-7-21              RUNNING   pid 1419, uptime 0:32:53
kube-controller-manager-7-21     RUNNING   pid 2153, uptime 0:10:07
kube-scheduler-7-21              RUNNING   pid 2188, uptime 0:00:34

4.6 安装部署所有集群规划主机

同样，在10.4.7.22部署好

五、检查主控节点

操作主机10.4.7.21,22（以21为例）

创建软连接
[root@hdss7-21 ~]# ln -s /opt/kubernetes/server/bin/kubectl /usr/local/bin/
查看主控节点健康状态
[root@hdss7-21 ~]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok
scheduler            Healthy   ok
etcd-2               Healthy   {"health":"true"}
etcd-1               Healthy   {"health":"true"}
etcd-0               Healthy   {"health":"true"}

问题排查
如果检查健康状态时，只显示了一个etcd的节点，那就是apiserver那里配置错了，填写了同一个etcd的地址，回去改一下就好
同样，在10.4.7.22部署好

posted @ 2021-07-09 21:45 沾沾自喜的混子阅读(256) 评论(0) 编辑收藏举报

刷新页面返回顶部

加载中...

沾沾自喜的混子

烟花，在烈日当空的白昼绽放

第五章部署master主控节点

一、部署etcd集群

1.1 集群规划

1.2 签发证书

1.3 创建生成自签证书签名请求（csr）的JSON配置文件

1.4 签发证书

1.5 安装etcd服务

1.6 下发证书

1.7 创建etcd启动脚本

1.8 安装后台管理工具supervisor

1.9 查看集群服务状态

二、部署kube-apiserver集群

2.1 集群规划

2.2 下载kubernetes服务端

2.3 在10.4.7.200服务器上生成并签发证书

2.4 配置apiserver日志审计

2.5 配置启动脚本

2.6 配置supervisor启动配置

2.7 查看进程

2.8 配置apiserver L4代理

2.9 部署keepalived

三、部署controller-manager

3.1 集群规划

3.2 创建启动脚本

3.3 修改文件权限，创建目录

3.4 创建supervisor配置

3.5 启动服务并检查

3.6 安装部署所有集群规划的主机

四、部署kube-scheduler

4.1 集群规划

4.2 创建启动脚本

4.3 调整文件权限，创建目录

4.4 创建supervisor配置

4.5 启动服务并检查

4.6 安装部署所有集群规划主机

五、检查主控节点

公告

加载中...

沾沾自喜的混子

烟花，在烈日当空的白昼绽放

第五章 部署master主控节点

一、部署etcd集群

1.1 集群规划

1.2 签发证书

1.3 创建生成自签证书签名请求（csr）的JSON配置文件

1.4 签发证书

1.5 安装etcd服务

1.6 下发证书

1.7 创建etcd启动脚本

1.8 安装后台管理工具supervisor

1.9 查看集群服务状态

二、部署kube-apiserver集群

2.1 集群规划

2.2 下载kubernetes服务端

2.3 在10.4.7.200服务器上生成并签发证书

2.4 配置apiserver日志审计

2.5 配置启动脚本

2.6 配置supervisor启动配置

2.7 查看进程

2.8 配置apiserver L4代理

2.9 部署keepalived

三、部署controller-manager

3.1 集群规划

3.2 创建启动脚本

3.3 修改文件权限，创建目录

3.4 创建supervisor配置

3.5 启动服务并检查

3.6 安装部署所有集群规划的主机

四、部署kube-scheduler

4.1 集群规划

4.2 创建启动脚本

4.3 调整文件权限，创建目录

4.4 创建supervisor配置

4.5 启动服务并检查

4.6 安装部署所有集群规划主机

五、检查主控节点

公告

第五章部署master主控节点