Kubernetes二进制安装步骤
部署环境 角色 IP 组件 k8s-master 134.0.84.110 kube-apiserver，kube-controller-manager，kube-scheduler，etcd k8s-node1 134.0.84.103 kubelet，kube-proxy，docker，flannel，etcd k8s-node2 134.0.84.104 kubelet，kube-proxy，docker，flannel，etcd
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(master生成拷贝到node) # cat ca-config.json { “signing”: { “default”: { “expiry”: “87600h” }, “profiles”: { “www”: { “expiry”: “87600h”, “usages”: [ “signing”, “key encipherment”, “server auth”, “client auth” ] } } } } EOF # 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": [ "134.0.84.110", "134.0.84.103", "134.0.84.104" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing" } ] } # 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.pem1.2 部署Etcd 二进制包下载地址：wget https://github.com/etcd-io/etcd/releases/download/v3.2.12/etcd-v3.2.12-linux-amd64.tar.gz 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” --etcd01，etcd02，etcd03 ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS=“https://134.0.84.110:2380” ETCD_LISTEN_CLIENT_URLS=“https://134.0.84.110:2379”
#[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://134.0.84.110:2380" ETCD_ADVERTISE_CLIENT_URLS="https://134.0.84.110:2379" ETCD_INITIAL_CLUSTER="etcd01=https://134.0.84.110:2380,etcd02=https://134.0.84.103:2380,etcd03=https://134.0.84.104:2380" 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 /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 capem serverpem /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://134.0.84.110:2379,https://134.0.84.103:2379,https://134.0.84.104:2379” cluster-health member 18218cfabd4e0dea is healthy: got healthy result from https://134.0.84.110:2379 member 541c1c40994c939b is healthy: got healthy result from https://134.0.84.103:2379 member a342ea2798d20705 is healthy: got healthy result from https://134.0.84.104:2379 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
在Node安装Docker
在两台node节点分别执行： # 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，安装flannel 在两台node节点上执行： 写入预定义子网段： # cd /opt/etcd/ssl/ # /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints=“https://134.0.84.110:2379,https://134.0.84.103:2379,https://134.0.84.104:2379” set /coreos.com/network/config ‘{ “Network”: “172.17.0.0/16”, “Backend”: {“Type”: “vxlan”}}’ 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 # mkdir -p /opt/kubernetes/{bin,cfg,ssl} # mv flanneld mk-docker-opts.sh /opt/kubernetes/bin 配置Flannel： # vim /opt/kubernetes/cfg/flanneld FLANNEL_OPTIONS="–etcd-endpoints=https://134.0.84.110:2379,https://134.0.84.103:2379,https://134.0.84.104:2379 -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： # vim /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： # vim /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： node01网络信息: [root@k8s-node01 bin]# ifconfig flannel.1 flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 inet 172.17.81.0 netmask 255.255.255.255 broadcast 0.0.0.0 inet6 fe80::3c54:39ff:fecd:1acf prefixlen 64 scopeid 0x20<link> ether 3e:54:39:cd:1a:cf txqueuelen 0 (Ethernet) RX packets 2 bytes 168 (168.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2 bytes 228 (228.0 B) TX errors 0 dropped 28 overruns 0 carrier 0 collisions 0 [root@k8s-node01 bin]# ifconfig docker0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.81.1 netmask 255.255.255.0 broadcast 172.17.81.255 ether 02:42:7d:7e:e4:b3 txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 node02网络信息: [root@k8s-node02 bin]# ifconfig flannel.1 flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 inet 172.17.94.0 netmask 255.255.255.255 broadcast 0.0.0.0 inet6 fe80::ec47:35ff:fee8:c5ba prefixlen 64 scopeid 0x20<link> ether ee:47:35:e8:c5:ba txqueuelen 0 (Ethernet) RX packets 2 bytes 168 (168.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2 bytes 228 (228.0 B) TX errors 0 dropped 29 overruns 0 carrier 0 collisions 0 [root@k8s-node02 bin]# ifconfig docker0 docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.94.1 netmask 255.255.255.0 broadcast 172.17.94.255 ether 02:42:08:cb:0b:f2 txqueuelen 0 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 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 172.17.81.0 # ping 172.17.81.1 # ping 172.17.94.0 # ping 172.17.94.1 如果能通说明Flannel部署成功。如果不通检查下日志：journalctl -u flannel在Master节点部署组件 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”, “134.0.84.110”, “134.0.84.103”, “134.0.84.104”, “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 # cp *.pem /opt/kubernetes/ssl/ 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://134.0.84.110:2379,https://134.0.84.103:2379,https://134.0.84.104:2379 \ --bind-address=134.0.84.110 \ --secure-port=6443 \ --advertise-address=134.0.84.110 \ --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" 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 /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 /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 /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 $KUBE_CONTROLLER_MANAGER_OPTS Restart=on-failure [Install] WantedBy=multi-user.target 启动： systemctl daemon-reload systemctl enable kube-controller-manager systemctl restart kube-controller-manager所有组件都已经启动成功，通过kubectl工具查看当前集群组件状态： # /opt/kubernetes/bin/kubectl get cs NAME STATUS MESSAGE ERROR controller-manager Healthy ok etcd-1 Healthy {“health”: “true”} etcd-2 Healthy {“health”: “true”} scheduler Healthy ok etcd-0 Healthy {“health”: “true”} 如上输出说明组件都正常。
在Node节点部署组件 Master apiserver启用TLS认证后，Node节点kubelet组件想要加入集群，必须使用CA签发的有效证书才能与apiserver通信，当Node节点很多时，签署证书是一件很繁琐的事情，因此有了TLS Bootstrapping机制，kubelet会以一个低权限用户自动向apiserver申请证书，kubelet的证书由apiserver动态签署。
将kubernetes命令添加到系统变量 # vim /etc/profile PATH=$PATH:/opt/kubernetes/bin/ # source /etc/profile
5.1 在master执行：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生成脚本 # cd /opt/kubernetes/ssl/ # vim kubeconfig.sh # 创建kubelet bootstrapping kubeconfig BOOTSTRAP_TOKEN=674c457d4dcf2eefe4920d7dbb6b0ddc KUBE_APISERVER=“https://134.0.84.110:6443”
# 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 执行脚本 [root@k8s-master kubernetesssl]# sh kubeconfig.sh Cluster "kubernetes" set. User "kubelet-bootstrap" set. Context "default" created. Switched to context "default". Cluster "kubernetes" set. User "kube-proxy" set. Context "default" created. Switched to context "default". 将bootstrap.kubeconfig kube-proxy.kubeconfig这两个文件拷贝到Node节点/opt/kubernetes/cfg目录下 # scp bootstrap.kubeconfig kube-proxy.kubeconfig 134.0.84.103:/opt/kubernetes/cfg/ # scp bootstrap.kubeconfig kube-proxy.kubeconfig 134.0.84.104:/opt/kubernetes/cfg/5.2 部署kubelet组件
在master服务器，将前下载的二进制包中的kubelet和kube-proxy拷贝到node服务器的/opt/kubernetes/bin目录下。 # cd /opt/kubernetes/kubernetes/server/bin # scp kube-proxy kubelet 134.0.84.103:/opt/kubernetes/bin/ # scp kube-proxy kubelet 134.0.84.104:/opt/kubernetes/bin/ 创建kubelet配置文件： root@ubuntu2:/opt/kubernetes/cfg# cat /opt/kubernetes/cfg/kubelet KUBELET_OPTS="--logtostderr=true \ --v=4 \ --address=134.0.84.103 \ --hostname-override=134.0.84.103 \ --kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \ --experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \ --cert-dir=/opt/kubernetes/ssl \ --allow-privileged=true \ --cluster-dns=8.8.8.8 \ --cluster-domain=cluster.local \ --fail-swap-on=false \ --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 # cat /opt/kubernetes/cfg/kubelet.config systemd管理kubelet组件： # cat /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 NAME AGE REQUESTOR CONDITION node-csr-5ekUr22JHk_mdPJiiuf8EOiTwDto1yuqxakXi4UYDyw 68s kubelet-bootstrap Pending # kubectl certificate approve node-csr-5ekUr22JHk_mdPJiiuf8EOiTwDto1yuqxakXi4UYDyw # kubectl get node NAME STATUS ROLES AGE VERSION 134.0.84.103 Ready <none> 15s v1.12.1 第二个节点做相同的操作，最终结果： [root@k8s-master bin]# kubectl get node NAME STATUS ROLES AGE VERSION 134.0.84.103 Ready <none> 7m37s v1.12.1 134.0.84.104 Ready <none> 14s v1.12.15.3 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=134.0.84.103 –cluster-cidr=10.0.0.0/24 –kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
systemd管理kube-proxy组件： # cat /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查看集群状态 [root@k8s-master ~]# kubectl get node NAME STATUS ROLES AGE VERSION 134.0.84.103 Ready 14m v1.12.1 134.0.84.104 Ready 7m26s v1.12.1 [root@k8s-master ~]# kubectl get node NAME STATUS ROLES AGE VERSION 134.0.84.103 Ready 14m v1.12.1 134.0.84.104 Ready 7m29s v1.12.1 [root@k8s-master ~]# kubectl get cs NAME STATUS MESSAGE ERROR controller-manager Healthy ok scheduler Healthy ok etcd-1 Healthy {“health”: “true”} etcd-2 Healthy {“health”: “true”} etcd-0 Healthy {“health”: “true”}
运行一个测试示例 创建一个Nginx Web，测试集群是否正常工作： [root@k8s-master ~]# kubectl run nginx --image=nginx --replicas=3 kubectl run --generator=deployment/apps.v1beta1 is DEPRECATED and will be removed in a future version. Use kubectl create instead. deployment.apps/nginx created [root@k8s-master ~]# kubectl expose deployment nginx --port=88 --target-port=80 --type=NodePort service/nginx exposed [root@k8s-master ~]# kubectl get pods NAME READY STATUS RESTARTS AGE nginx-dbddb74b8-7bm6j 0/1 ContainerCreating 0 17s nginx-dbddb74b8-qw7sv 0/1 ContainerCreating 0 17s nginx-dbddb74b8-w77q8 0/1 ContainerCreating 0 17s
[root@k8s-master ~]# kubectl get pods NAME READY STATUS RESTARTS AGE nginx-dbddb74b8-7bm6j 1/1 Running 0 51s nginx-dbddb74b8-qw7sv 1/1 Running 0 51s nginx-dbddb74b8-w77q8 1/1 Running 0 51s
[root@k8s-master ~]# kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.0.0.1 443/TCP 102m nginx NodePort 10.0.0.215 88:48603/TCP 68s
访问集群中部署的Nginx，打开浏览器输入：http://134.0.84.104:48603/
无法查看pod运行日志
[root@k8s-master ~]# kubectl logs nginx-dbddb74b8-7bm6j Error from server (Forbidden): Forbidden (user=system:anonymous, verb=get, resource=nodes, subresource=proxy) ( pods/log nginx-dbddb74b8-7bm6j)
解决方法： # kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous 问题解决： [root@k8s-master ~]# kubectl logs nginx-dbddb74b8-7bm6j 172.17.94.0 - - [19/Apr/2019:08:16:19 +0000] “GET / HTTP/1.1” 200 612 “-” “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.92 Safari/537.36” “-” 2019/04/19 08:16:19 [error] 6#6: *2 open() “/usr/share/nginx/html/favicon.ico” failed (2: No such file or directory), client: 172.17.94.0, server: localhost, request: “GET /favicon.ico HTTP/1.1”, host: “134.0.84.104:48603”, referrer: “http://134.0.84.104:48603/” 172.17.94.0 - - [19/Apr/2019:08:16:19 +0000] “GET /favicon.ico HTTP/1.1” 404 556 “http://134.0.84.104:48603/” “Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.92 Safari/537.36” “-”
部署kubernetes-dashboard 下载dashboard.yaml文件 wget https://raw.githubusercontent.com/kubernetes/dashboard/master/aio/deploy/recommended/kubernetes-dashboard.yaml
修改配置文件：
安装kubernetes-dashboard # kubectl create -f kubernetes-dashboard.yaml
默认kubernetes-dashboard用户权限非常低，登录时会报错：需要创建一个高权限的用户 warning configmaps is forbidden: User “system:serviceaccount:kube-system:kubernetes-dashboard” cannot list configmaps in the namespace “default” close warning persistentvolumeclaims is forbidden: User “system:serviceaccount:kube-system:kubernetes-dashboard” cannot list persistentvolumeclaims in the namespace “default” close warning secrets is forbidden: User “system:serviceaccount:kube-system:kubernetes-dashboard” cannot list secrets in the namespace “default” close warning …… 解决办法： 1.添加serviceaccount账户，设置并使其可登陆 apiVersion: v1 kind: ServiceAccount metadata: name: aks-dashboard-admin namespace: kube-system — apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: aks-dashboard-admin roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-admin subjects: - kind: ServiceAccount name: aks-dashboard-admin namespace: kube-system 2.创建完全管理权限 apiVersion: rbac.authorization.k8s.io/v1beta1 kind: ClusterRoleBinding metadata: name: kubernetes-dashboard labels: k8s-app: kubernetes-dashboard roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-admin subjects: - kind: ServiceAccount name: kubernetes-dashboard namespace: kube-system
apiVersion: rbac.authorization.k8s.io/v1beta1 kind: ClusterRoleBinding metadata: name: kubernetes-dashboard-head labels: k8s-app: kubernetes-dashboard-head roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-admin subjects: - kind: ServiceAccount name: kubernetes-dashboard-head namespace: kube-system查看tocken # kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk ‘{print $1}’)
用户名： aks-dashboard-admin-token-wdkj6 token： eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.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.yBDoEskovx1nnw9wbsI8_W4AxRtEW_jcnSqI2R2R1asOWFZxbv2MUrB_z_fhsfZ4Xf44p8ZVE8Y6ELRYRT6U_OF00owxB_SntGiqetpzBWVWknVmruMazeJUyAjgFaFvkI_rL1yMbogvhhJlNNzLqU-nzQ40iXdzL8-fig_7EqtnA7XJa5s9Suo_vZGM-ypdUVMc120m8qINb1-y2NUu_ipLa-sKaJMLLnxx7mNeQZqI44uFicynSqfOwkwSlljCLyl8O9rt-OiIRLh6rIAKkzEosrlKVUbds1tC2KZ_g7DiUM9O5prKtKlIVkpNWivNS-VPb_6E9mgvZbZRQavAiw打开登录页面； 注意：谷歌新版本浏览器无法打开kubernetes-dashboard的WEB-UI。需要使用火狐浏览器。 https://134.0.84.103:30001 输入上一步查到的tocken，即可登录
其它命令：
查看pod日志 # kubectl -n kube-system logs kubernetes-dashboard-7dcf6b77f7-mbnxc 删除pod [root@k8s-master dashboard]# kubectl delete -f dashboard-controller.yaml