k8s二进制部署 - master节点安装

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"}