k8s-部署-06-apiserver
1、部署主机
2、安装部署kube-apiserver
# 1、下载软件并创建软连接
tar xf kubernetes-server-linux-amd64-v1.15.2.tar.gz -C /opt/
cd /opt/
mv kubernetes/ kubernetes-1.15.2
ln -s kubernetes-1.15.2/ kubernetes
# 2、删除无用的文件
cd /opt/kubernetes
rm -rf kubernetes-src.tar.gz
cd cd /opt/kubernetes/server/bin/
rm -rf *.tar
rm -rf *_tag
# 3、留下的文件
[root@hdss7-21 bin]# pwd
/opt/kubernetes/server/bin
[root@hdss7-21 bin]# ll
total 884656
-rwxr-xr-x 1 root root 43534816 Aug 5 2019 apiextensions-apiserver
drwxr-xr-x 2 root root 228 Apr 3 22:43 cert
-rwxr-xr-x 1 root root 100548640 Aug 5 2019 cloud-controller-manager
drwxr-xr-x 2 root root 100 Apr 3 22:46 conf
-rwxr-xr-x 1 root root 200648416 Aug 5 2019 hyperkube
-rwxr-xr-x 1 root root 40182208 Aug 5 2019 kubeadm
-rwxr-xr-x 1 root root 164501920 Aug 5 2019 kube-apiserver
-rwxr-xr-x 1 root root 1075 Apr 3 18:07 kube-apiserver.sh
-rwxr-xr-x 1 root root 116397088 Aug 5 2019 kube-controller-manager
-rwxr-xr-x 1 root root 333 Apr 3 15:28 kube-controller-manager.sh
-rwxr-xr-x 1 root root 42985504 Aug 5 2019 kubectl
-rwxr-xr-x 1 root root 119616640 Aug 5 2019 kubelet
-rwxr-xr-x 1 root root 608 Apr 3 16:34 kubelet.sh
-rwxr-xr-x 1 root root 36987488 Aug 5 2019 kube-proxy
-rwxr-xr-x 1 root root 189 Apr 3 23:13 kube-proxy.sh
-rwxr-xr-x 1 root root 38786144 Aug 5 2019 kube-scheduler
-rwxr-xr-x 1 root root 143 Apr 3 15:36 kube-scheduler.sh
-rwxr-xr-x 1 root root 1648224 Aug 5 2019 mounter
# 4、签发apiserver-client证书：apiserver与etc通信用的证书。apiserver是客户端，etcd是服务端。运维主机HDSS-200.host.com上
[root@hdss7-200 certs]# cat /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"
}
]
}
# 5、签发证书client
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client
# 6、创建签名请求（csr）的JSON配置文件，apiserver，server端证书
[root@hdss7-200 certs]# cat /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]#
# 7、签发 apiserver 证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver
# 8、拷贝证书
mkdir /opt/kubernetes/server/bin/cert/
scp -r ca.pem ca-key.pem client.pem client-key.pem apiserver.pem apiserver-key.pem hdss7-21:/opt/kubernetes/server/bin/cert/
scp -r ca.pem ca-key.pem client.pem client-key.pem apiserver.pem apiserver-key.pem hdss7-22:/opt/kubernetes/server/bin/cert/
# 9、创建启动配置脚本
mkdir -p /opt/kubernetes/server/bin/conf/
[root@hdss7-21 bin]# cat /opt/kubernetes/server/bin/conf/audit.yaml
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"
[root@hdss7-21 bin]#
# 10、创建启动脚本 注意标注的地方需要针对不同的主机进行修改
[root@hdss7-21 bin]# cat /opt/kubernetes/server/bin/kube-apiserver.sh
#!/bin/bash
./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 ./cert/ca.pem \
--requestheader-client-ca-file ./cert/ca.pem \
--enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota \
--etcd-cafile ./cert/ca.pem \
--etcd-certfile ./cert/client.pem \
--etcd-keyfile ./cert/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 ./cert/ca-key.pem \
--service-cluster-ip-range 192.168.0.0/16 \
--service-node-port-range 1-65535 \
--target-ram-mb=1024 \
--kubelet-client-certificate ./cert/client.pem \
--kubelet-client-key ./cert/client-key.pem \
--log-dir /data/logs/kubernetes/kube-apiserver \
--tls-cert-file ./cert/apiserver.pem \
--tls-private-key-file ./cert/apiserver-key.pem \
--v 2
# 11、查看帮助命令，查看每行的意思
[root@hdss7-21 bin]# ./kube-apiserver --help|grep -A 5 target-ram-mb
# 12、添加可执行权限
chmod +x kube-apiserver.sh
# 13、创建后台启动，标注的地方需要针对不同的主机进行修改
[root@hdss7-21 bin]# cat /etc/supervisord.d/kube-apiserver.ini
[program:kube-apiserver-7-21]
command=/opt/kubernetes/server/bin/kube-apiserver.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-apiserver/apiserver.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 bin]#
# 14、创建日志目录
mkdir -p /data/logs/kubernetes/kube-apiserver
# 15、启动并验证
supervisorctl update
netstat -luntp | grep kube-api
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