1k8s安裝

1.1 解壓安裝

hdss7-21

tar -zxvf kubernetes-server-1552linux-amd64.tar.gz -C /opt/
mv kubernetes/ kubernetes-v1.15.2
ln -s kubernetes-v1.15.2/ kubernetes
# 刪除原始碼包
rm -rf /opt/kubernetes/kubernetes-src.tar.gz

# 刪除docker映象
-rwxr-xr-x 1 root root  43534816 Aug  5  2019 apiextensions-apiserver
-rwxr-xr-x 1 root root 100548640 Aug  5  2019 cloud-controller-manager
-rw-r--r-- 1 root root         8 Aug  5  2019 cloud-controller-manager.docker_tag
-rw-r--r-- 1 root root 144437760 Aug  5  2019 cloud-controller-manager.tar
-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
-rw-r--r-- 1 root root         8 Aug  5  2019 kube-apiserver.docker_tag
-rw-r--r-- 1 root root 208390656 Aug  5  2019 kube-apiserver.tar
-rwxr-xr-x 1 root root 116397088 Aug  5  2019 kube-controller-manager
-rw-r--r-- 1 root root         8 Aug  5  2019 kube-controller-manager.docker_tag
-rw-r--r-- 1 root root 160286208 Aug  5  2019 kube-controller-manager.tar
-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  36987488 Aug  5  2019 kube-proxy
-rw-r--r-- 1 root root         8 Aug  5  2019 kube-proxy.docker_tag
-rw-r--r-- 1 root root  84282368 Aug  5  2019 kube-proxy.tar
-rwxr-xr-x 1 root root  38786144 Aug  5  2019 kube-scheduler
-rw-r--r-- 1 root root         8 Aug  5  2019 kube-scheduler.docker_tag
-rw-r--r-- 1 root root  82675200 Aug  5  2019 kube-scheduler.tar
-rwxr-xr-x 1 root root   1648224 Aug  5  2019 mounter
[root@hdss7-21 bin]# cd /opt/kubernetes/server/bin/
[root@hdss7-21 bin]# rm -f *.tar
[root@hdss7-21 bin]# rm -f *_tag
[root@hdss7-21 bin]# ll
total 884636
-rwxr-xr-x 1 root root  43534816 Aug  5  2019 apiextensions-apiserver
-rwxr-xr-x 1 root root 100548640 Aug  5  2019 cloud-controller-manager
-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 116397088 Aug  5  2019 kube-controller-manager
-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  36987488 Aug  5  2019 kube-proxy
-rwxr-xr-x 1 root root  38786144 Aug  5  2019 kube-scheduler
-rwxr-xr-x 1 root root   1648224 Aug  5  2019 mounter
 

1.2 簽發證書

hdss7-200

# vi client-csr.json

{
    "CN": "k8s-node",
    "hosts": [
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "ST": "beijing",
            "L": "beijing",
            "O": "od",
            "OU": "ops"
        }
    ]
}

# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client

# vi 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"
        }
    ]
}

# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver
 

1.3發放證書

hdss7-21

cd /opt/kubernetes/server/bin/cert
scp hdss7-200:/opt/certs/ca.pem .
scp hdss7-200:/opt/certs/ca-key.pem .
scp hdss7-200:/opt/certs/client.pem .
scp hdss7-200:/opt/certs/client-key.pem .
scp hdss7-200:/opt/certs/apiserver.pem .
scp hdss7-200:/opt/certs/apiserver-key.pem .

1.4 kubeServer

1.4.1建立日誌審計

bin]# mkdir conf
conf]# vi 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"
 

1.4.2建立啟動指令碼

vi /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 3000-29999 \
  --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

# chmod +x kube-apiserver.sh

1.5建立supervisor啟動ini

# vi /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)

# 建立目錄
mkdir -p /data/logs/kubernetes/kube-apiserver

檢驗

supervisorctl status
[root@hdss7-22 kubernetes]# netstat  -luntp | grep kube-api
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      1537/./kube-apiserv 
tcp6       0      0 :::6443                 :::*                    LISTEN      1537/./kube-apiserv