- 主控节点安装
3.1. etcd安装
etcd 的leader选举机制，要求至少为3台或以上的奇数台。本次安装涉及：hdss7-12，hdss7-21，hdss7-22
3.1.1. 签发etcd证书
证书签发服务器 hdss7-200:
• 创建ca的json配置: /opt/certs/ca-config.json
• server 表示服务端连接客户端时携带的证书，用于客户端验证服务端身份
• client 表示客户端连接服务端时携带的证书，用于服务端验证客户端身份
• peer 表示相互之间连接时使用的证书，如etcd节点之间验证
{
"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"
]
}
}
}
}
• 创建etcd证书配置：/opt/certs/etcd-peer-csr.json
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
{
"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": "92fuge",
"OU": "ops"
}
]
}
• 签发证书
[root@hdss7-200 ~]# 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]# ll etcd-peer* -rw-r--r-- 1 root root 1062 Jan 5 17:01 etcd-peer.csr -rw-r--r-- 1 root root 363 Jan 5 16:59 etcd-peer-csr.json -rw------- 1 root root 1675 Jan 5 17:01 etcd-peer-key.pem -rw-r--r-- 1 root root 1428 Jan 5 17:01 etcd-peer.pem
3.1.2. 安装etcd
etcd地址：https://github.com/etcd-io/etcd/
实验使用版本: etcd-v3.1.20-linux-amd64.tar.gz
本次安装涉及：hdss7-12，hdss7-21，hdss7-22
• 下载etcd
[root@hdss7-12 ~]# useradd -s /sbin/nologin -M etcd [root@hdss7-12 ~]# cd /opt/src/ [root@hdss7-12 src]# wget https://github.com/etcd-io/etcd/releases/download/v3.1.20/etcd-v3.1.20-linux-amd64.tar.gz [root@hdss7-12 src]# tar -xf etcd-v3.1.20-linux-amd64.tar.gz [root@hdss7-12 src]# mv etcd-v3.1.20-linux-amd64 /opt/release/etcd-v3.1.20 [root@hdss7-12 src]# ln -s /opt/release/etcd-v3.1.20 /opt/apps/etcd [root@hdss7-12 src]# ll /opt/apps/etcd lrwxrwxrwx 1 root root 25 Jan 5 17:56 /opt/apps/etcd -> /opt/release/etcd-v3.1.20 [root@hdss7-12 src]# mkdir -p /opt/apps/etcd/certs /data/etcd /data/logs/etcd-server
• 下发证书到各个etcd上
[root@hdss7-200 ~]# cd /opt/certs/
[root@hdss7-200 certs]# for i in 12 21 22;do scp ca.pem etcd-peer.pem etcd-peer-key.pem hdss7-${i}:/opt/apps/etcd/certs/ ;done
[root@hdss7-12 src]# md5sum /opt/apps/etcd/certs/*
8778d0c3411891af61a287e49a70c89a /opt/apps/etcd/certs/ca.pem
7918783c2f6bf69e96edf03e67d04983 /opt/apps/etcd/certs/etcd-peer-key.pem
d4d849751a834c7727d42324fdedf92d /opt/apps/etcd/certs/etcd-peer.pem
• 创建启动脚本(部分参数每台机器不同)
[root@hdss7-12 ~]# vim /opt/apps/etcd/etcd-server-startup.sh #!/bin/sh # listen-peer-urls etcd节点之间通信端口 # listen-client-urls 客户端与etcd通信端口 # quota-backend-bytes 配额大小 # 需要修改的参数：name,listen-peer-urls,listen-client-urls,initial-advertise-peer-urls WORK_DIR=$(dirname $(readlink -f[root@hdss7-12 ~]# chmod u+x /opt/apps/etcd/etcd-server-startup.sh [root@hdss7-12 ~]# chown -R etcd.etcd /opt/apps/etcd/ /data/etcd /data/logs/etcd-server))
[ $? -eq 0 ] && cd $WORK_DIR || exit
/opt/apps/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 ~]# yum install -y supervisor [root@hdss7-12 ~]# systemctl start supervisord ; systemctl enable supervisord [root@hdss7-12 ~]# vim /etc/supervisord.d/etcd-server.ini [program:etcd-server-7-12] command=/opt/apps/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/apps/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 ~]# supervisorctl update etcd-server-7-12: added process group3.1.3. 启动etcd
因为这些进程都是要启动为后台进程，要么手动启动，要么采用后台进程管理工具，实验中使用后台管理工具
[root@hdss7-12 ~]# supervisorctl status # supervisorctl 状态 etcd-server-7-12 RUNNING pid 22375, uptime 0:00:39 [root@hdss7-12 ~]# netstat -lntp|grep etcd tcp 0 0 10.4.7.12:2379 0.0.0.0:* LISTEN 22379/etcd tcp 0 0 127.0.0.1:2379 0.0.0.0:* LISTEN 22379/etcd tcp 0 0 10.4.7.12:2380 0.0.0.0:* LISTEN 22379/etcd [root@hdss7-12 ~]# /opt/apps/etcd/etcdctl member list # 随着etcd重启，leader会变化 988139385f78284: name=etcd-server-7-22 peerURLs=https://10.4.7.22:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.22:2379 isLeader=false 5a0ef2a004fc4349: name=etcd-server-7-21 peerURLs=https://10.4.7.21:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.21:2379 isLeader=true 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=false [root@hdss7-12 ~]# /opt/apps/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• etcd 进程状态查看
[root@hdss7-12 ~]# supervisorctl start etcd-server-7-12 [root@hdss7-12 ~]# supervisorctl stop etcd-server-7-12 [root@hdss7-12 ~]# supervisorctl restart etcd-server-7-12 [root@hdss7-12 ~]# supervisorctl status etcd-server-7-12• etcd 启停方式
[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 -xf kubernetes-server-linux-amd64.tar.gz [root@hdss7-21 src]# mv kubernetes /opt/release/kubernetes-v1.15.2 [root@hdss7-21 src]# ln -s /opt/release/kubernetes-v1.15.2 /opt/apps/kubernetes [root@hdss7-21 src]# ll /opt/apps/kubernetes lrwxrwxrwx 1 root root 31 Jan 6 12:59 /opt/apps/kubernetes -> /opt/release/kubernetes-v1.15.2 [root@hdss7-21 src]# cd /opt/apps/kubernetes [root@hdss7-21 kubernetes]# rm -f kubernetes-src.tar.gz [root@hdss7-21 kubernetes]# cd server/bin/ [root@hdss7-21 bin]# rm -f *.tar *_tag # *.tar *_tag 镜像文件 [root@hdss7-21 bin]# ll total 884636 -rwxr-xr-x 1 root root 43534816 Aug 5 18:01 apiextensions-apiserver -rwxr-xr-x 1 root root 100548640 Aug 5 18:01 cloud-controller-manager -rwxr-xr-x 1 root root 200648416 Aug 5 18:01 hyperkube -rwxr-xr-x 1 root root 40182208 Aug 5 18:01 kubeadm -rwxr-xr-x 1 root root 164501920 Aug 5 18:01 kube-apiserver -rwxr-xr-x 1 root root 116397088 Aug 5 18:01 kube-controller-manager -rwxr-xr-x 1 root root 42985504 Aug 5 18:01 kubectl -rwxr-xr-x 1 root root 119616640 Aug 5 18:01 kubelet -rwxr-xr-x 1 root root 36987488 Aug 5 18:01 kube-proxy -rwxr-xr-x 1 root root 38786144 Aug 5 18:01 kube-scheduler -rwxr-xr-x 1 root root 1648224 Aug 5 18:01 mounter3.2. apiserver 安装
3.2.1. 下载kubernetes服务端
aipserver 涉及的服务器：hdss7-21，hdss7-22
下载 kubernetes 二进制版本包需要科学上网工具
• 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@hdss7-200 ~]# cd /opt/certs/ [root@hdss7-200 certs]# vim /opt/certs/client-csr.json { "CN": "k8s-n92fugee", "hosts": [ ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "beijing", "L": "beijing", "O": "92fuge", "OU": "ops" } ] }3.2.2. 签发证书
签发证书 涉及的服务器：hdss7-200
• 签发client证书（apiserver和etcd通信证书）
[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 2020/01/06 13:42:47 [INFO] generate received request 2020/01/06 13:42:47 [INFO] received CSR 2020/01/06 13:42:47 [INFO] generating key: rsa-2048 2020/01/06 13:42:47 [INFO] encoded CSR 2020/01/06 13:42:47 [INFO] signed certificate with serial number 268276380983442021656020268926931973684313260543 2020/01/06 13:42:47 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for websites. For more information see the Baseline Requirements for the Issuance and Management of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org); specifically, section 10.2.3 ("Information Requirements"). [root@hdss7-200 certs]# ls client* -l -rw-r--r-- 1 root root 993 Jan 6 13:42 client.csr -rw-r--r-- 1 root root 280 Jan 6 13:42 client-csr.json -rw------- 1 root root 1679 Jan 6 13:42 client-key.pem -rw-r--r-- 1 root root 1363 Jan 6 13:42 client.pem[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": "92fuge", "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 2020/01/06 13:46:56 [INFO] generate received request 2020/01/06 13:46:56 [INFO] received CSR 2020/01/06 13:46:56 [INFO] generating key: rsa-2048 2020/01/06 13:46:56 [INFO] encoded CSR 2020/01/06 13:46:56 [INFO] signed certificate with serial number 573076691386375893093727554861295529219004473872 2020/01/06 13:46:56 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for websites. For more information see the Baseline Requirements for the Issuance and Management of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org); specifically, section 10.2.3 ("Information Requirements"). [root@hdss7-200 certs]# ls apiserver* -l -rw-r--r-- 1 root root 1249 Jan 6 13:46 apiserver.csr -rw-r--r-- 1 root root 566 Jan 6 13:45 apiserver-csr.json -rw------- 1 root root 1675 Jan 6 13:46 apiserver-key.pem -rw-r--r-- 1 root root 1598 Jan 6 13:46 apiserver.pem• 签发server证书（apiserver和其它k8s组件通信使用）
# 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]# for i in 21 22;do echo hdss7-$i;ssh hdss7-$i "mkdir /opt/apps/kubernetes/server/bin/certs";scp apiserver-key.pem apiserver.pem ca-key.pem ca.pem client-key.pem client.pem hdss7-$i:/opt/apps/kubernetes/server/bin/certs/;done• 证书下发
[root@hdss7-21 bin]# mkdir /opt/apps/kubernetes/conf [root@hdss7-21 bin]# vim /opt/apps/kubernetes/conf/audit.yaml # 打开文件后，设置 :set paste，避免自动缩进 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"3.2.3. 配置apiserver日志审计
aipserver 涉及的服务器：hdss7-21，hdss7-22
[root@hdss7-21 bin]# vim /opt/apps/kubernetes/server/bin/kube-apiserver-startup.sh #!/bin/bash WORK_DIR=$(dirname $(readlink -f[root@hdss7-21 bin]# vim /etc/supervisord.d/kube-apiserver.ini [program:kube-apiserver-7-21] command=/opt/apps/kubernetes/server/bin/kube-apiserver-startup.sh numprocs=1 directory=/opt/apps/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 [root@hdss7-21 bin]# supervisorctl update [root@hdss7-21 bin]# supervisorctl status etcd-server-7-21 RUNNING pid 23637, uptime 22:26:08 kube-apiserver-7-21 RUNNING pid 32591, uptime 0:05:37))
[ $? -eq 0 ] && cd $WORK_DIR || exit
/opt/apps/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 23.2.4. 配置启动脚本
aipserver 涉及的服务器：hdss7-21，hdss7-22
• 创建启动脚本
[root@hdss7-12 ~]# supervisorctl start kube-apiserver-7-21 [root@hdss7-12 ~]# supervisorctl stop kube-apiserver-7-21 [root@hdss7-12 ~]# supervisorctl restart kube-apiserver-7-21 [root@hdss7-12 ~]# supervisorctl status kube-apiserver-7-21• 配置supervisor启动配置
[root@hdss7-21 bin]# netstat -lntp|grep api tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 32595/kube-apiserve tcp6 0 0 :::6443 :::* LISTEN 32595/kube-apiserve [root@hdss7-21 bin]# ps uax|grep kube-apiserver|grep -v grep root 32591 0.0 0.0 115296 1476 ? S 20:17 0:00 /bin/bash /opt/apps/kubernetes/server/bin/kube-apiserver-startup.sh root 32595 3.0 2.3 402720 184892 ? Sl 20:17 0:16 /opt/apps/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• 启停apiserver
[root@hdss7-11 ~]# yum install -y nginx [root@hdss7-11 ~]# vim /etc/nginx/nginx.conf• 查看进程
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; } } [root@hdss7-11 ~]# systemctl start nginx; systemctl enable nginx [root@hdss7-11 ~]# curl 127.0.0.1:7443 # 测试几次 Client sent an HTTP request to an HTTPS server. [root@hdss7-11 ~]# cat /var/log/nginx/proxy.log 06/Jan/2020:21:00:27 +0800|127.0.0.1|10.4.7.21:6443|TCP|200|0.001|0.000|76|78|78|76 06/Jan/2020:21:05:03 +0800|127.0.0.1|10.4.7.22:6443|TCP|200|0.020|0.019|76|78|78|76 06/Jan/2020:21:05:04 +0800|127.0.0.1|10.4.7.21:6443|TCP|200|0.001|0.001|76|78|78|763.3. 配置apiserver L4代理
3.3.1. nginx配置
L4 代理涉及的服务器：hdss7-11，hdss7-12
[root@hdss7-11 ~]# yum install -y keepalived [root@hdss7-11 ~]# vim /etc/keepalived/check_port.sh # 配置检查脚本 #!/bin/bash if [ $# -eq 1 ] && [[ =~ ^[0-9]+ ]];then [ $(netstat -lntp|grep ": " |wc -l) -eq 0 ] && echo "[ERROR] nginx may be not running!" && exit 1 || exit 0 else echo "[ERROR] need one port!" exit 1 fi [root@hdss7-11 ~]# chmod +x /etc/keepalived/check_port.sh# 末尾加上以下内容，stream 只能加在 main 中
# 此处只是简单配置下nginx，实际生产中，建议进行更合理的配置
! Configuration File for keepalived global_defs { router_id 10.4.7.11 } vrrp_script chk_nginx { script "/etc/keepalived/check_port.sh 7443" interval 2 weight -20 } vrrp_instance VI_1 { state MASTER interface ens32 virtual_router_id 251 priority 100 advert_int 1 mcast_src_ip 10.4.7.11 nopreempt authentication { auth_type PASS auth_pass 11111111 } track_script { chk_nginx } virtual_ipaddress { 10.4.7.10 } }3.3.2. keepalived配置
aipserver L4 代理涉及的服务器：hdss7-11，hdss7-12
• 安装keepalive
! Configuration File for keepalived global_defs { router_id 10.4.7.12 } vrrp_script chk_nginx { script "/etc/keepalived/check_port.sh 7443" interval 2 weight -20 } vrrp_instance VI_1 { state BACKUP interface ens32 virtual_router_id 251 mcast_src_ip 10.4.7.12 priority 90 advert_int 1 authentication { auth_type PASS auth_pass 11111111 } track_script { chk_nginx } virtual_ipaddress { 10.4.7.10 } }• 配置主节点：/etc/keepalived/keepalived.conf
主节点中，必须加上 nopreempt
因为一旦因为网络抖动导致VIP漂移，不能让它自动飘回来，必须要分析原因后手动迁移VIP到主节点！如主节点确认正常后，重启备节点的keepalive，让VIP飘到主节点.
keepalived 的日志输出配置此处省略，生产中需要进行处理。
[root@hdss7-11 ~]# systemctl start keepalived ; systemctl enable keepalived [root@hdss7-11 ~]# ip addr show ens32 2: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:6d:b8:82 brd ff:ff:ff:ff:ff:ff inet 10.4.7.11/24 brd 10.4.7.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet 10.4.7.10/32 scope global ens32 valid_lft forever preferred_lft forever• 配置备节点：/etc/keepalived/keepalived.conf
[root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/kube-controller-manager-startup.sh #!/bin/sh WORK_DIR=$(dirname $(readlink -f[root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/kube-scheduler-startup.sh #!/bin/sh WORK_DIR=$(dirname $(readlink -f[root@hdss7-21 ~]# ln -s /opt/apps/kubernetes/server/bin/kubectl /usr/local/bin/ [root@hdss7-21 ~]# kubectl get cs NAME STATUS MESSAGE ERROR scheduler Healthy ok controller-manager Healthy ok etcd-1 Healthy {"health": "true"} etcd-0 Healthy {"health": "true"} etcd-2 Healthy {"health": "true"} [root@hdss7-22 ~]# ln -s /opt/apps/kubernetes/server/bin/kubectl /usr/local/bin/ [root@hdss7-22 ~]# 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"}))
[ $? -eq 0 ] && cd $WORK_DIR || exit
/opt/apps/kubernetes/server/bin/kube-scheduler \
--leader-elect \
--log-dir /data/logs/kubernetes/kube-scheduler \
--master http://127.0.0.1:8080 \
--v 2
[root@hdss7-21 ~]# chmod u+x /opt/apps/kubernetes/server/bin/kube-scheduler-startup.sh
[root@hdss7-21 ~]# mkdir -p /data/logs/kubernetes/kube-scheduler
[root@hdss7-21 ~]# vim /etc/supervisord.d/kube-scheduler.ini
[program:kube-scheduler-7-21]
command=/opt/apps/kubernetes/server/bin/kube-scheduler-startup.sh
numprocs=1
directory=/opt/apps/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
[root@hdss7-21 ~]# supervisorctl update
kube-scheduler-7-21: stopped
kube-scheduler-7-21: updated process group
[root@hdss7-21 ~]# supervisorctl status
etcd-server-7-21 RUNNING pid 23637, uptime 1 day, 0:26:53
kube-apiserver-7-21 RUNNING pid 32591, uptime 2:06:22
kube-controller-manager-7-21 RUNNING pid 33357, uptime 0:10:37
kube-scheduler-7-21 RUNNING pid 33450, uptime 0:01:18))
[ $? -eq 0 ] && cd $WORK_DIR || exit
/opt/apps/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
[root@hdss7-21 ~]# chmod u+x /opt/apps/kubernetes/server/bin/kube-controller-manager-startup.sh
[root@hdss7-21 ~]# vim /etc/supervisord.d/kube-controller-manager.ini
[program:kube-controller-manager-7-21]
command=/opt/apps/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/apps/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)
[root@hdss7-21 ~]# supervisorctl update
kube-controller-manager-7-21: stopped
kube-controller-manager-7-21: updated process group
[root@hdss7-21 ~]# supervisorctl status
etcd-server-7-21 RUNNING pid 23637, uptime 1 day, 0:16:54
kube-apiserver-7-21 RUNNING pid 32591, uptime 1:56:23
kube-controller-manager-7-21 RUNNING pid 33357, uptime 0:00:38• 启动keepalived
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3.4. controller-manager 安装
controller-manager 涉及的服务器：hdss7-21，hdss7-22
controller-manager 设置为只调用当前机器的 apiserver，走127.0.0.1网卡，因此不配制SSL证书
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3.5. kube-scheduler安装
kube-scheduler 涉及的服务器：hdss7-21，hdss7-22
kube-scheduler 设置为只调用当前机器的 apiserver，走127.0.0.1网卡，因此不配制SSL证书
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3.6. 检查主控节点状态
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