内容简介:作者:李振良https://blog.51cto.com/lizhenliang/2325770Minikube是一个工具,可以在本地快速运行一个单点的Kubernetes,尝试Kubernetes或日常开发的用户使用。不能用于生产环境。
作者:李振良
https://blog.51cto.com/lizhenliang/2325770
官方提供的几种Kubernetes部署方式
- minikube
Minikube是一个工具,可以在本地快速运行一个单点的Kubernetes,尝试Kubernetes或日常开发的用户使用。不能用于生产环境。
官方地址: https://kubernetes.io/docs/setup/minikube/
- kubeadm
Kubeadm也是一个工具,提供kubeadm init和kubeadm join,用于快速部署Kubernetes集群。
官方地址: https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm/
- 二进制包
从官方下载发行版的二进制包,手动部署每个组件,组成Kubernetes集群。
小结:
生产环境中部署Kubernetes集群,只有Kubeadm和二进制包可选,Kubeadm降低部署门槛,但屏蔽了很多细节,遇到问题很难排查。我们这里使用二进制包部署Kubernetes集群,我也是推荐大家使用这种方式,虽然手动部署麻烦点,但学习很多工作原理,更有利于后期维护。
软件环境
软件 | 版本 |
---|---|
操作系统 | CentOS7.5_x64 |
Docker | 18-ce |
Kubernetes | 1.12 |
服务器角色
角色 | IP | 组件 |
---|---|---|
k8s-master | 192.168.31.63 | kube-apiserver,kube-controller-manager,kube-scheduler,etcd |
k8s-node1 | 192.168.31.65 | kubelet,kube-proxy,docker,flannel,etcd |
k8s-node2 | 192.168.31.66 | kubelet,kube-proxy,docker,flannel,etcd |
架构图
1. 部署Etcd集群
使用cfssl来生成自签证书,先下载cfssl工具:
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64 mv cfssl_linux-amd64 /usr/local/bin/cfssl mv cfssljson_linux-amd64 /usr/local/bin/cfssljson mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo
1.1 生成证书
创建以下三个文件:
# cat ca-config.json { "signing": { "default": { "expiry": "87600h" }, "profiles": { "www": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } # cat ca-csr.json { "CN": "etcd CA", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing" } ] } # cat server-csr.json { "CN": "etcd", "hosts": [ "192.168.31.63", "192.168.31.65", "192.168.31.66" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing" } ] }
生成证书:
cfssl gencert -initca ca-csr.json | cfssljson -bare ca - cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server # ls *pem ca-key.pem ca.pem server-key.pem server.pem
证书这块知道怎么生成、怎么用即可,建议暂时不必过多研究。
1.2 部署Etcd
二进制包下载地址: https://github.com/coreos/etcd/releases/tag/v3.2.12
以下部署步骤在规划的三个etcd节点操作一样,唯一不同的是etcd配置文件中的服务器IP要写当前的:
解压二进制包:
# mkdir /opt/etcd/{bin,cfg,ssl} -p # tar zxvf etcd-v3.2.12-linux-amd64.tar.gz # mv etcd-v3.2.12-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
创建etcd配置文件:
# cat /opt/etcd/cfg/etcd #[Member] ETCD_NAME="etcd01" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.31.63:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.31.63:2379" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.31.63:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.31.63:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.31.63:2380,etcd02=https://192.168.31.65:2380,etcd03=https://192.168.31.66:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new"
- ETCD_NAME 节点名称
- ETCD_DATA_DIR 数据目录
- ETCD_LISTEN_PEER_URLS 集群通信监听地址
- ETCD_LISTEN_CLIENT_URLS 客户端访问监听地址
- ETCD_INITIAL_ADVERTISE_PEER_URLS 集群通告地址
- ETCD_ADVERTISE_CLIENT_URLS 客户端通告地址
- ETCD_INITIAL_CLUSTER 集群节点地址
- ETCD_INITIAL_CLUSTER_TOKEN 集群Token
- ETCD_INITIAL_CLUSTER_STATE 加入集群的当前状态,new是新集群,existing表示加入已有集群
systemd管理etcd:
# cat /usr/lib/systemd/system/etcd.service [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target [Service] Type=notify EnvironmentFile=/opt/etcd/cfg/etcd ExecStart=/opt/etcd/bin/etcd --name=${ETCD_NAME} --data-dir=${ETCD_DATA_DIR} --listen-peer-urls=${ETCD_LISTEN_PEER_URLS} --listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 --advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} --initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} --initial-cluster=${ETCD_INITIAL_CLUSTER} --initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} --initial-cluster-state=new --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --peer-cert-file=/opt/etcd/ssl/server.pem --peer-key-file=/opt/etcd/ssl/server-key.pem --trusted-ca-file=/opt/etcd/ssl/ca.pem --peer-trusted-ca-file=/opt/etcd/ssl/ca.pem Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target
把刚才生成的证书拷贝到配置文件中的位置:
# cp ca*pem server*pem /opt/etcd/ssl
启动并设置开启启动:
# systemctl start etcd # systemctl enable etcd
都部署完成后,检查etcd集群状态:
# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.31.63:2379,https://192.168.31.65:2379,https://192.168.31.66:2379" cluster-health member 18218cfabd4e0dea is healthy: got healthy result from https://192.168.31.63:2379 member 541c1c40994c939b is healthy: got healthy result from https://192.168.31.65:2379 member a342ea2798d20705 is healthy: got healthy result from https://192.168.31.66:2379 cluster is healthy
如果输出上面信息,就说明集群部署成功。如果有问题第一步先看日志:/var/log/message 或 journalctl -u etcd
2. 在Node安装Docker
# yum install -y yum-utils device-mapper-persistent-data lvm2 # yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo # yum install docker-ce -y # curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://bc437cce.m.daocloud.io # systemctl start docker # systemctl enable docker
3. 部署Flannel网络
工作原理:
Flannel要用etcd存储自身一个子网信息,所以要保证能成功连接Etcd,写入预定义子网段:
# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.31.63:2379,https://192.168.31.65:2379,https://192.168.31.66:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
以下部署步骤在规划的每个node节点都操作。
下载二进制包:
# wget https://github.com/coreos/flannel/releases/download/v0.10.0/flannel-v0.10.0-linux-amd64.tar.gz # tar zxvf flannel-v0.9.1-linux-amd64.tar.gz # mv flanneld mk-docker-opts.sh /opt/kubernetes/bin
配置Flannel:
# cat /opt/kubernetes/cfg/flanneld FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.31.63:2379,https://192.168.31.65:2379,https://192.168.31.66:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"
systemd管理Flannel:
# cat /usr/lib/systemd/system/flanneld.service [Unit] Description=Flanneld overlay address etcd agent After=network-online.target network.target Before=docker.service [Service] Type=notify EnvironmentFile=/opt/kubernetes/cfg/flanneld ExecStart=/opt/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env Restart=on-failure [Install] WantedBy=multi-user.target
配置 Docker 启动指定子网段:
# cat /usr/lib/systemd/system/docker.service [Unit] Description=Docker Application Container Engine Documentation=https://docs.docker.com After=network-online.target firewalld.service Wants=network-online.target [Service] Type=notify EnvironmentFile=/run/flannel/subnet.env ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS ExecReload=/bin/kill -s HUP $MAINPID LimitNOFILE=infinity LimitNPROC=infinity LimitCORE=infinity TimeoutStartSec=0 Delegate=yes KillMode=process Restart=on-failure StartLimitBurst=3 StartLimitInterval=60s [Install] WantedBy=multi-user.target
重启flannel和docker:
# systemctl daemon-reload # systemctl start flanneld # systemctl enable flanneld # systemctl restart docker
检查是否生效:
# ps -ef |grep docker root 20941 1 1 Jun28 ? 09:15:34 /usr/bin/dockerd --bip=172.17.34.1/24 --ip-masq=false --mtu=1450 # ip addr 3607: flannel.1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UNKNOWN link/ether 8a:2e:3d:09:dd:82 brd ff:ff:ff:ff:ff:ff inet 172.17.34.0/32 scope global flannel.1 valid_lft forever preferred_lft forever 3608: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state UP link/ether 02:42:31:8f:d3:02 brd ff:ff:ff:ff:ff:ff inet 172.17.34.1/24 brd 172.17.34.255 scope global docker0 valid_lft forever preferred_lft forever inet6 fe80::42:31ff:fe8f:d302/64 scope link valid_lft forever preferred_lft forever
确保docker0与flannel.1在同一网段。
测试不同节点互通,在当前节点访问另一个Node节点docker0 IP:
# ping 172.17.58.1 PING 172.17.58.1 (172.17.58.1) 56(84) bytes of data. 64 bytes from 172.17.58.1: icmp_seq=1 ttl=64 time=0.263 ms 64 bytes from 172.17.58.1: icmp_seq=2 ttl=64 time=0.204 ms
如果能通说明Flannel部署成功。如果不通检查下日志:journalctl -u flannel
4. 在Master节点部署组件
在部署Kubernetes之前一定要确保etcd、flannel、docker是正常工作的,否则先解决问题再继续。
4.1 生成证书
创建CA证书:
# cat ca-config.json { "signing": { "default": { "expiry": "87600h" }, "profiles": { "kubernetes": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } # cat ca-csr.json { "CN": "kubernetes", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "k8s", "OU": "System" } ] } # cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
生成apiserver证书:
# cat server-csr.json { "CN": "kubernetes", "hosts": [ "10.0.0.1", "127.0.0.1", "192.168.31.63", "kubernetes", "kubernetes.default", "kubernetes.default.svc", "kubernetes.default.svc.cluster", "kubernetes.default.svc.cluster.local" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "k8s", "OU": "System" } ] } cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
生成kube-proxy证书:
# cat kube-proxy-csr.json { "CN": "system:kube-proxy", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "k8s", "OU": "System" } ] } # cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
最终生成以下证书文件:
# ls *pem ca-key.pem ca.pem kube-proxy-key.pem kube-proxy.pem server-key.pem server.pem
4.2 部署apiserver组件
下载二进制包: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.12.md
下载这个包(kubernetes-server-linux-amd64.tar.gz)就够了,包含了所需的所有组件。
# mkdir /opt/kubernetes/{bin,cfg,ssl} -p # tar zxvf kubernetes-server-linux-amd64.tar.gz # cd kubernetes/server/bin # cp kube-apiserver kube-scheduler kube-controller-manager kubectl /opt/kubernetes/bin
创建token文件,用途后面会讲到:
# cat /opt/kubernetes/cfg/token.csv 674c457d4dcf2eefe4920d7dbb6b0ddc,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
第一列:随机字符串,自己可生成
第二列:用户名
第三列:UID
第四列:用户组
创建apiserver配置文件:
# cat /opt/kubernetes/cfg/kube-apiserver KUBE_APISERVER_OPTS="--logtostderr=true --v=4 --etcd-servers=https://192.168.31.63:2379,https://192.168.31.65:2379,https://192.168.31.66:2379 --bind-address=192.168.31.63 --secure-port=6443 --advertise-address=192.168.31.63 --allow-privileged=true --service-cluster-ip-range=10.0.0.0/24 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota,NodeRestriction --authorization-mode=RBAC,Node --enable-bootstrap-token-auth --token-auth-file=/opt/kubernetes/cfg/token.csv --service-node-port-range=30000-50000 --tls-cert-file=/opt/kubernetes/ssl/server.pem --tls-private-key-file=/opt/kubernetes/ssl/server-key.pem --client-ca-file=/opt/kubernetes/ssl/ca.pem --service-account-key-file=/opt/kubernetes/ssl/ca-key.pem --etcd-cafile=/opt/etcd/ssl/ca.pem --etcd-certfile=/opt/etcd/ssl/server.pem --etcd-keyfile=/opt/etcd/ssl/server-key.pem"
配置好前面生成的证书,确保能连接etcd。
参数说明:
- –logtostderr 启用日志
- —v 日志等级
- –etcd-servers etcd集群地址
- –bind-address 监听地址
- –secure-port https安全端口
- –advertise-address 集群通告地址
- –allow-privileged 启用授权
- –service-cluster-ip-range Service虚拟IP地址段
- –enable-admission-plugins 准入控制模块
- –authorization-mode 认证授权,启用RBAC授权和节点自管理
- –enable-bootstrap-token-auth 启用TLS bootstrap功能,后面会讲到
- –token-auth-file token文件
- –service-node-port-range Service Node类型默认分配端口范围
systemd管理apiserver:
# cat /usr/lib/systemd/system/kube-apiserver.service [Unit] Description=Kubernetes API Server Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-apiserver ExecStart=/opt/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target
启动:
# systemctl daemon-reload # systemctl enable kube-apiserver # systemctl restart kube-apiserver
4.3 部署scheduler组件
创建schduler配置文件:
# cat /opt/kubernetes/cfg/kube-scheduler KUBE_SCHEDULER_OPTS="--logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect"
参数说明:
- –master 连接本地apiserver
- –leader-elect 当该组件启动多个时,自动选举(HA)
systemd管理schduler组件:
# cat /usr/lib/systemd/system/kube-scheduler.service [Unit] Description=Kubernetes Scheduler Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-scheduler ExecStart=/opt/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target
启动:
# systemctl daemon-reload # systemctl enable kube-scheduler # systemctl restart kube-scheduler
4.4 部署controller-manager组件
创建controller-manager配置文件:
# cat /opt/kubernetes/cfg/kube-controller-manager KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect=true --address=127.0.0.1 --service-cluster-ip-range=10.0.0.0/24 --cluster-name=kubernetes --cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem --cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem --root-ca-file=/opt/kubernetes/ssl/ca.pem --service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem"
systemd管理controller-manager组件:
# cat /usr/lib/systemd/system/kube-controller-manager.service [Unit] Description=Kubernetes Controller Manager Documentation=https://github.com/kubernetes/kubernetes [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-controller-manager ExecStart=/opt/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target
启动:
# systemctl daemon-reload # systemctl enable kube-controller-manager # systemctl restart kube-controller-manager
所有组件都已经启动成功,通过kubectl工具查看当前集群组件状态:
# /opt/kubernetes/bin/kubectl get cs NAME STATUS MESSAGE ERROR scheduler Healthy ok etcd-0 Healthy {"health":"true"} etcd-2 Healthy {"health":"true"} etcd-1 Healthy {"health":"true"} controller-manager Healthy ok
如上输出说明组件都正常。
5. 在Node节点部署组件
Master apiserver启用TLS认证后,Node节点kubelet组件想要加入集群,必须使用CA签发的有效证书才能与apiserver通信,当Node节点很多时,签署证书是一件很繁琐的事情,因此有了TLS Bootstrapping机制,kubelet会以一个低权限用户自动向apiserver申请证书,kubelet的证书由apiserver动态签署。
认证大致工作流程如图所示:
5.1 将kubelet-bootstrap用户绑定到系统集群角色
kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
5.2 创建kubeconfig文件
在生成kubernetes证书的目录下执行以下命令生成kubeconfig文件:
# 创建kubelet bootstrapping kubeconfig BOOTSTRAP_TOKEN=674c457d4dcf2eefe4920d7dbb6b0ddc KUBE_APISERVER="https://192.168.31.63:6443" # 设置集群参数 kubectl config set-cluster kubernetes --certificate-authority=./ca.pem --embed-certs=true --server=${KUBE_APISERVER} --kubeconfig=bootstrap.kubeconfig # 设置客户端认证参数 kubectl config set-credentials kubelet-bootstrap --token=${BOOTSTRAP_TOKEN} --kubeconfig=bootstrap.kubeconfig # 设置上下文参数 kubectl config set-context default --cluster=kubernetes --user=kubelet-bootstrap --kubeconfig=bootstrap.kubeconfig # 设置默认上下文 kubectl config use-context default --kubeconfig=bootstrap.kubeconfig #---------------------- # 创建kube-proxy kubeconfig文件 kubectl config set-cluster kubernetes --certificate-authority=./ca.pem --embed-certs=true --server=${KUBE_APISERVER} --kubeconfig=kube-proxy.kubeconfig kubectl config set-credentials kube-proxy --client-certificate=./kube-proxy.pem --client-key=./kube-proxy-key.pem --embed-certs=true --kubeconfig=kube-proxy.kubeconfig kubectl config set-context default --cluster=kubernetes --user=kube-proxy --kubeconfig=kube-proxy.kubeconfig kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig # ls bootstrap.kubeconfig kube-proxy.kubeconfig
将这两个文件拷贝到Node节点/opt/kubernetes/cfg目录下。
5.2 部署kubelet组件
将前面下载的二进制包中的kubelet和kube-proxy拷贝到/opt/kubernetes/bin目录下。
创建kubelet配置文件:
# cat /opt/kubernetes/cfg/kubelet KUBELET_OPTS="--logtostderr=true --v=4 --hostname-override=192.168.31.65 --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig --bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig --config=/opt/kubernetes/cfg/kubelet.config --cert-dir=/opt/kubernetes/ssl --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
参数说明:
- –hostname-override 在集群中显示的主机名
- –kubeconfig 指定kubeconfig文件位置,会自动生成
- –bootstrap-kubeconfig 指定刚才生成的bootstrap.kubeconfig文件
- –cert-dir 颁发证书存放位置
- –pod-infra-container-image 管理Pod网络的镜像
其中/opt/kubernetes/cfg/kubelet.config配置文件如下:
kind: KubeletConfiguration apiVersion: kubelet.config.k8s.io/v1beta1 address: 192.168.31.65 port: 10250 readOnlyPort: 10255 cgroupDriver: cgroupfs clusterDNS: ["10.0.0.2"] clusterDomain: cluster.local. failSwapOn: false authentication: anonymous: enabled: true
systemd管理kubelet组件:
# cat /usr/lib/systemd/system/kubelet.service [Unit] Description=Kubernetes Kubelet After=docker.service Requires=docker.service [Service] EnvironmentFile=/opt/kubernetes/cfg/kubelet ExecStart=/opt/kubernetes/bin/kubelet $KUBELET_OPTS Restart=on-failure KillMode=process [Install] WantedBy=multi-user.target
启动:
# systemctl daemon-reload # systemctl enable kubelet # systemctl restart kubelet
在Master审批Node加入集群:
启动后还没加入到集群中,需要手动允许该节点才可以。
在Master节点查看请求签名的Node:
# kubectl get csr # kubectl certificate approve XXXXID # kubectl get node
5.3 部署kube-proxy组件
创建kube-proxy配置文件:
# cat /opt/kubernetes/cfg/kube-proxy KUBE_PROXY_OPTS="--logtostderr=true --v=4 --hostname-override=192.168.31.65 --cluster-cidr=10.0.0.0/24 --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
systemd管理kube-proxy组件:
# cat /usr/lib/systemd/system/kube-proxy.service [Unit] Description=Kubernetes Proxy After=network.target [Service] EnvironmentFile=-/opt/kubernetes/cfg/kube-proxy ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS Restart=on-failure [Install] WantedBy=multi-user.target
启动:
# systemctl daemon-reload # systemctl enable kube-proxy # systemctl restart kube-proxy
Node2部署方式一样。
6. 查看集群状态
# kubectl get node NAME STATUS ROLES AGE VERSION 192.168.31.65 Ready <none> 1d v1.12.0 192.168.31.66 Ready <none> 1d v1.12.0 # 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"}
7. 运行一个测试示例
创建一个Nginx Web,测试集群是否正常工作:
# kubectl run nginx --image=nginx --replicas=3 # kubectl expose deployment nginx --port=88 --target-port=80 --type=NodePort
查看Pod,Service:
# kubectl get pods NAME READY STATUS RESTARTS AGE nginx-64f497f8fd-fjgt2 1/1 Running 3 1d nginx-64f497f8fd-gmstq 1/1 Running 3 1d nginx-64f497f8fd-q6wk9 1/1 Running 3 1d # kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 28d nginx NodePort 10.0.0.175 <none> 88:38696/TCP 28d
访问集群中部署的Nginx,打开浏览器输入: http://192.168.31.66:38696
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小结
- 有问题先查日志,再谷歌
- 多思考,多梳理逻辑
- 配置文件较多,有很多字段你可能都不知道干啥,不要着急,随着一步步使用,慢慢就熟悉了
以上所述就是小编给大家介绍的《Kubernetes v1.12 二进制部署集群(HTTPS+RBAC)》,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持!
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