下载kubernetes服务端
[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 mounter
证书下发
[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
配置apiserver日志审计
[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"
创建启动脚本
[root@hdss7-21 bin]# vim /opt/apps/kubernetes/server/bin/kube-apiserver-startup.sh #!/bin/bash WORK_DIR=$(dirname $(readlink -f $0)) [ $? -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 2
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/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
启停apiserver
[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
查看进程
[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
配置apiserver L4代理
[root@hdss7-11 ~]# yum install -y 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;
}
}
[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|76
安装keepalived
[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 ] && [[ $1 =~ ^[0-9]+ ]];then [ $(netstat -lntp|grep ":$1 " |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
配置主节点：/etc/keepalived/keepalived.conf
! 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
}
}
配置备节点：/etc/keepalived/keepalived.conf
! 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
}
}
! 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
}
}
启动keepalived
[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 ......
controller-manager 安装
创建启动脚本
[root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/kube-controller-manager-startup.sh #!/bin/sh WORK_DIR=$(dirname $(readlink -f $0)) [ $? -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
配置supervisor启动配置
[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
kube-scheduler安装
创建启动脚本
[root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/kube-scheduler-startup.sh #!/bin/sh WORK_DIR=$(dirname $(readlink -f $0)) [ $? -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
配置supervisor启动配置
[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
检查主控节点状态
[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"}