◎部署组件
◎Master各组件作用
部署Kubernetes API服务部署
1.准备软件包
[root@linux-node1 ~]# cd /usr/local/src/kubernetes/server/bin
[root@linux-node1 kubernetes]# cp kube-apiserver kube-controller-manager kube-scheduler /opt/kubernetes/bin/
2.创建生成CSR的 JSON 配置文件
[root@linux-node1 ssl]# cat > kubernetes-csr.json <<EOF
{
"CN": "kubernetes",
"hosts": [
"127.0.0.1",
"192.168.56.11",
"10.1.0.1",
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
EOF
3.生成 kubernetes 证书和私钥
[root@linux-node1 ssl]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
-ca-key=/opt/kubernetes/ssl/ca-key.pem \
-config=/opt/kubernetes/ssl/ca-config.json \
-profile=kubernetes kubernetes-csr.json | cfssljson -bare kubernetes
[root@linux-node1 ssl]# ll kubernetes*.pem
-rw------- 1 root root 1679 Sep 23 12:58 kubernetes-key.pem
-rw-r--r-- 1 root root 1610 Sep 23 12:58 kubernetes.pem
[root@linux-node1 ssl]# cp kubernetes*.pem /opt/kubernetes/ssl/
[root@linux-node1 ssl]# scp kubernetes*.pem 192.168.56.12:/opt/kubernetes/ssl/
[root@linux-node1 ssl]# scp kubernetes*.pem 192.168.56.13:/opt/kubernetes/ssl/
4.创建 kube-apiserver 使用的客户端 token 文件
[root@linux-node1 ssl]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '
ad6d5bb607a186796d8861557df0d17f
[root@linux-node1 ssl]# cat > /opt/kubernetes/ssl/bootstrap-token.csv <<EOF
ad6d5bb607a186796d8861557df0d17f,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
5.创建基础用户名/密码认证配置
[root@linux-node1 ~]# cat > /opt/kubernetes/ssl/basic-auth.csv <<EOF
admin,admin,1
readonly,readonly,2
EOF
6.部署Kubernetes API Server
[root@linux-node1 ~]# cat > /usr/lib/systemd/system/kube-apiserver.service <<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=network.target
[Service]
ExecStart=/opt/kubernetes/bin/kube-apiserver \
--admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota,NodeRestriction \
--bind-address=192.168.56.11 \
--insecure-bind-address=127.0.0.1 \
--authorization-mode=Node,RBAC \
--runtime-config=rbac.authorization.k8s.io/v1 \
--kubelet-https=true \
--anonymous-auth=false \
--basic-auth-file=/opt/kubernetes/ssl/basic-auth.csv \
--enable-bootstrap-token-auth \
--token-auth-file=/opt/kubernetes/ssl/bootstrap-token.csv \
--service-cluster-ip-range=10.1.0.0/16 \
--service-node-port-range=20000-40000 \
--tls-cert-file=/opt/kubernetes/ssl/kubernetes.pem \
--tls-private-key-file=/opt/kubernetes/ssl/kubernetes-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/kubernetes/ssl/ca.pem \
--etcd-certfile=/opt/kubernetes/ssl/kubernetes.pem \
--etcd-keyfile=/opt/kubernetes/ssl/kubernetes-key.pem \
--etcd-servers=https://192.168.56.11:2379,https://192.168.56.12:2379,https://192.168.56.13:2379 \
--enable-swagger-ui=true \
--allow-privileged=true \
--audit-log-maxage=30 \
--audit-log-maxbackup=3 \
--audit-log-maxsize=100 \
--audit-log-path=/opt/kubernetes/log/api-audit.log \
--event-ttl=1h \
--v=2 \
--logtostderr=false \
--log-dir=/opt/kubernetes/log
Restart=on-failure
RestartSec=5
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
7.启动API Server服务
[root@linux-node1 ~]# systemctl daemon-reload && systemctl enable kube-apiserver && systemctl start kube-apiserver
查看API Server服务状态
[root@linux-node1 ~]# systemctl status kube-apiserver
[root@linux-node1 ~]# netstat -tunpl|grep kube
tcp 0 0 192.168.56.11:6443 0.0.0.0:* LISTEN 2120/kube-apiserver
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 2120/kube-apiserver
部署Controller Manager服务
[root@linux-node1 ~]# cat > /usr/lib/systemd/system/kube-controller-manager.service <<EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
[Service]
ExecStart=/opt/kubernetes/bin/kube-controller-manager \
--address=127.0.0.1 \
--master=http://127.0.0.1:8080 \
--allocate-node-cidrs=true \
--service-cluster-ip-range=10.1.0.0/16 \
--cluster-cidr=10.2.0.0/16 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
--root-ca-file=/opt/kubernetes/ssl/ca.pem \
--leader-elect=true \
--v=2 \
--logtostderr=false \
--log-dir=/opt/kubernetes/log
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF
1.启动Controller Manager
[root@linux-node1 ~]# systemctl daemon-reload && systemctl enable kube-controller-manager && systemctl start kube-controller-manager
2.查看服务状态
[root@linux-node1 ssl]# systemctl status kube-controller-manager
[root@linux-node1 ssl]# netstat -tunpl|grep kube-controlle
tcp 0 0 127.0.0.1:10252 0.0.0.0:* LISTEN 2174/kube-controlle
部署Kubernetes Scheduler
[root@linux-node1 ~]# cat > /usr/lib/systemd/system/kube-scheduler.service <<EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
[Service]
ExecStart=/opt/kubernetes/bin/kube-scheduler \
--address=127.0.0.1 \
--master=http://127.0.0.1:8080 \
--leader-elect=true \
--v=2 \
--logtostderr=false \
--log-dir=/opt/kubernetes/log
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF
1.部署服务
[root@linux-node1 ~]# systemctl daemon-reload && systemctl enable kube-scheduler && systemctl start kube-scheduler && systemctl status kube-scheduler
[root@linux-node1 ssl]# netstat -tunpl|grep kube-scheduler
tcp 0 0 127.0.0.1:10251 0.0.0.0:* LISTEN 2232/kube-scheduler
部署kubectl 命令行工具
1.准备二进制命令包
[root@linux-node1 ~]# cp /usr/local/src/kubernetes/client/bin/kubectl /opt/kubernetes/bin/
2.创建 admin 证书签名请求
[root@linux-node1 ~]# cd /usr/local/src/ssl/
[root@linux-node1 ssl]# cat > admin-csr.json <<EOF
{
"CN": "admin",
"hosts": [],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "system:masters",
"OU": "System"
}
]
}
EOF
3.生成 admin 证书和私钥:
[root@linux-node1 ssl]# cfssl gencert -ca=/opt/kubernetes/ssl/ca.pem \
-ca-key=/opt/kubernetes/ssl/ca-key.pem \
-config=/opt/kubernetes/ssl/ca-config.json \
-profile=kubernetes admin-csr.json | cfssljson -bare admin
[root@linux-node1 ssl]# ls -l admin*
-rw-r--r-- 1 root root 1009 Sep 23 13:13 admin.csr
-rw-r--r-- 1 root root 229 Sep 23 13:13 admin-csr.json
-rw------- 1 root root 1679 Sep 23 13:13 admin-key.pem
-rw-r--r-- 1 root root 1399 Sep 23 13:13 admin.pem
[root@linux-node1 ssl]# mv admin*.pem /opt/kubernetes/ssl/
4.设置集群参数
[root@linux-node1 ssl]# kubectl config set-cluster kubernetes \
--certificate-authority=/opt/kubernetes/ssl/ca.pem \
--embed-certs=true \
--server=https://192.168.56.11:6443
Cluster "kubernetes" set.
5.设置客户端认证参数
[root@linux-node1 ssl]# kubectl config set-credentials admin \
--client-certificate=/opt/kubernetes/ssl/admin.pem \
--embed-certs=true \
--client-key=/opt/kubernetes/ssl/admin-key.pem
User "admin" set.
6.设置上下文参数
[root@linux-node1 src]# kubectl config set-context kubernetes \
--cluster=kubernetes \
--user=admin
Context "kubernetes" created.
7.设置默认上下文
[root@linux-node1 src]# kubectl config use-context kubernetes
Switched to context "kubernetes".
最后会在家目录下生成.kube/config认证文件,若别的节点想运行kubectl命令需拷贝此文件
[root@linux-node1 ssl]# cat ~/.kube/config
apiVersion: v1
clusters:
- cluster:
certificate-authority-data:
LS0tLS1CRUdJTiB...
server: https://192.168.56.11:6443
name: kubernetes
contexts:
- context:
cluster: kubernetes
user: admin
name: kubernetes
current-context: kubernetes
kind: Config
preferences: {}
users:
- name: admin
user:
client-certificate-data: LS0tLS1CRUdJT...
client-key-data: LS0tLS1C...
8.使用kubectl工具
[root@linux-node1 ssl]# kubectl get cs
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-2 Healthy {"health": "true"}
etcd-0 Healthy {"health": "true"}
etcd-1 Healthy {"health": "true"}