2. apiserver 安装
aipserver 涉及的服务器：hdss7-21，hdss7-22
2.1 下载kubernetes服务端
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@hdss7-21 ~]# 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/kubernetes-v1.15.2[root@hdss7-21 src]# ln -s /opt/kubernetes-v1.15.2 /opt/kubernetes[root@hdss7-21 src]# ll /opt/kuberneteslrwxrwxrwx 1 root root 31 Jan 6 12:59 /opt/apps/kubernetes -> /opt/release/kubernetes-v1.15.2[root@hdss7-21 src]# cd /opt/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]# lltotal 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
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 ~]# 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
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
- 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]# 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
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
- 证书下发
[root@hdss7-200 certs]# for i in 21 22;do echo hdss7-$i;ssh hdss7-$i "mkdir /opt/kubernetes/server/bin/certs";scp apiserver-key.pem apiserver.pem ca-key.pem ca.pem client-key.pem client.pem hdss7-$i:/opt/kubernetes/server/bin/certs/;done
2.3 配置apiserver日志审计
aipserver 涉及的服务器：hdss7-21，hdss7-22
[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"
2.4 配置启动脚本
aipserver 涉及的服务器：hdss7-21，hdss7-22
- 创建启动脚本
[root@hdss7-21 bin]# vim /opt/kubernetes/server/bin/kube-apiserver-startup.sh
#!/bin/bash
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
- 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
[root@hdss7-21 bin]# cd /opt/kubernetes/server/bin
[root@hdss7-21 bin]# chmod 755 kube-apiserver-startup.sh
[root@hdss7-21 bin]# mkdir -p /data/logs/kubernetes/kube-apiserver/
[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
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