今天就跟大家聊聊有關怎樣進行Kubernetes二進制部署中的單節點部署,可能很多人都不太了解,為了讓大家更加了解,小編給大家總結了以下內容,希望大家根據這篇文章可以有所收獲。
1、Master組件
kube-apiserver
Kubernetes API,集群的統一入口,各組件協調者,以RESTful API提供接口服務,所有對象資源的增刪改查和監聽操作都交給APIServer處理后再提交給Etcd存儲。
kube-controller-manager
處理集群中常規后臺任務,一個 資源對應一個控制 器,而ControllerManager就是負責管理這些控制器的。
kube-scheduler
根據調度算法為新創建的Pod選擇一個Node節點,可以任意部署,可以部署在同一個節點上,也可以部署在不同的節點上。
etcd
分布式鍵值存儲系統。用于保存集群狀態數據,比如Pod、Service 等對象信息。
2、Node組件
kubelet
kubelet是Master在Node節點上的Agent,管理本機運行容器的生命周期,比如創建容器、Pod掛載數據卷、下 載secret、獲取容器和節點狀態等工作。kubelet將 每個Pod轉換成一組容器。
kube-proxy
在Node節點上實現Pod網絡代理,維護網絡規則和四層負載均衡工作。
docker或rocket
容器引擎,運行容器。
> # 工作原理:
1、準備包含應用程序的Deployment的yml文件,然后通過kubectl客戶端工具發送給ApiServer。
2、ApiServer接收到客戶端的請求并將資源內容存儲到數據庫(etcd)中。
3、Controller組件(包括scheduler、replication、endpoint)監控資源變化并作出反應。
4、ReplicaSet檢查數據庫變化,創建期望數量的pod實例。
5、Scheduler再次檢查數據庫變化,發現尚未被分配到具體執行節點(node)的Pod,然后根據一組相關規則將pod分配到可以運行它們的節點上,并更新數據庫,記錄pod分配情況。
6、Kubelete監控數據庫變化,管理后續pod的生命周期,發現被分配到它所在的節點上運行的那些pod。如果找到新pod,則會在該節點上運行這個新pod。
附:kuberproxy運行在集群各個主機上,管理網絡通信,如服務發現、負載均衡。當有數據發送到主機時,將其路由到正確的pod或容器。對于從主機上發出的數據,它可以基于請求地址發現遠程服務器,并將數據正確路由,在某些情況下會使用輪循調度算法(Round-robin)將請求發送到集群中的多個實例。
Kubernetes核心概念
1、Pod
最小部署單元
一組容器的集合
一個Pod中的容器共享網絡命名空間
Pod是短暫的
2、Controllers
ReplicaSet :確保 預期的Pod副本數量
Deployment:無狀態應用 部署
StatefulSet :有狀態應用部署
DaemonSet:確保所有Node運行同一個Pod
Job:一次性任務
Cronjob:定時任務
更高級層次對象,部署和管理Pod3、Service
防止Pod失聯
定義一組Pod的訪問策略
Label:標簽,附加到某個資源上,用于關聯對象、查詢和篩選
Namespaces:命名空間,將對象邏輯上隔離
Annotations:注釋
Minikube是一個工具,可以在本地快速運行一個單點的Kubernetes,僅用于嘗試Kubernetes或日常開發的用戶使用。
部署地址: https://kubernetes.io/docs/setup/minikube/
Kubeadm也是一個工具,提供kubeadm init和kubeadm join,用于快速部署Kubernetes集群。
部署地址:https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm/
推薦,從官方下載發行版的二進制包,手動部署每個組件,組成Kubernetes集群。
下載地址:https://github.com/kubernetes/kubernetes/releases
組件 | 使用的證書 |
---|---|
etcd | ca.pem, server.pem, server-key.pem |
flannel | ca.pem,server.pem, server-key.pem |
kube- apiserver | ca.pem, server.pem, server-key.pem |
kubelet | ca.pem, ca-key.pem |
kube-proxy | ca.pem, kube-proxy.pem, kube-proxy-key.pem |
kubectl | ca.pem, admin.pem, admin-key.pem |
二進制包下載地址
https://github.com/etcd-io/etcd/releases
1、自簽ETCD證書
2、ETCD部署
3、Node安裝docker
4、Flannel部署(先寫入子網到etcd)
1、自簽APIServer證書
2、部署APIServer組件(token,csv)
3、部署controller-manager(指定apiserver證書)和scheduler組件
1、生成kubeconfig(bootstrap,kubeconfig和kube-proxy.kubeconfig)
2、部署kubelet組件
3、部署kube-proxy組件
1、kubectl get csr && kubectl certificate approve 允許頒發證書,加入群集
2、添加一個node節點
3、查看kubectl get node 節點
Nginx1:192.168.35.104/24
Nginx2:192.168.35.105/24
master1:192.168.35.100/24
master2:192.168.35.103/24
node1:192.168.35.101/24
node2:192.168.35.102/24
[root@localhost ~]# mkdir k8s [root@localhost ~]# cd k8s/ [root@localhost k8s]# ls ##從宿主機拖進來 etcd-cert.sh etcd.sh [root@localhost k8s]# mkdir etcd-cert [root@localhost k8s]# mv etcd-cert.sh etcd-cert
vim etcd.sh #!/bin/bash # example: ./etcd.sh etcd01 192.168.1.10 etcd02=https://192.168.1.11:2380,etcd03=https://192.168.1.12:2380 ETCD_NAME=$1 ETCD_IP=$2 ETCD_CLUSTER=$3 WORK_DIR=/opt/etcd cat <<EOF >$WORK_DIR/cfg/etcd #[Member] ETCD_NAME="${ETCD_NAME}" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://${ETCD_IP}:2380" ETCD_LISTEN_CLIENT_URLS="https://${ETCD_IP}:2379" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://${ETCD_IP}:2380" ETCD_ADVERTISE_CLIENT_URLS="https://${ETCD_IP}:2379" ETCD_INITIAL_CLUSTER="etcd01=https://${ETCD_IP}:2380,${ETCD_CLUSTER}" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" EOF cat <<EOF >/usr/lib/systemd/system/etcd.service [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target [Service] Type=notify EnvironmentFile=${WORK_DIR}/cfg/etcd ExecStart=${WORK_DIR}/bin/etcd \ --name=\${ETCD_NAME} \ --data-dir=\${ETCD_DATA_DIR} \ --listen-peer-urls=\${ETCD_LISTEN_PEER_URLS} \ --listen-client-urls=\${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \ --advertise-client-urls=\${ETCD_ADVERTISE_CLIENT_URLS} \ --initial-advertise-peer-urls=\${ETCD_INITIAL_ADVERTISE_PEER_URLS} \ --initial-cluster=\${ETCD_INITIAL_CLUSTER} \ --initial-cluster-token=\${ETCD_INITIAL_CLUSTER_TOKEN} \ --initial-cluster-state=new \ --cert-file=${WORK_DIR}/ssl/server.pem \ --key-file=${WORK_DIR}/ssl/server-key.pem \ --peer-cert-file=${WORK_DIR}/ssl/server.pem \ --peer-key-file=${WORK_DIR}/ssl/server-key.pem \ --trusted-ca-file=${WORK_DIR}/ssl/ca.pem \ --peer-trusted-ca-file=${WORK_DIR}/ssl/ca.pem Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target EOF systemctl daemon-reload systemctl enable etcd systemctl restart etcd
vim etcd-cert.sh cat > ca-config.json <<EOF { "signing": { "default": { "expiry": "87600h" }, "profiles": { "www": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF cat > ca-csr.json <<EOF { "CN": "etcd CA", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing" } ] } EOF cfssl gencert -initca ca-csr.json | cfssljson -bare ca - #----------------------- cat > server-csr.json <<EOF { "CN": "etcd", "hosts": [ "10.206.240.188", "10.206.240.189", "10.206.240.111" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
[root@localhost k8s]# vim cfssl.sh curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo [root@localhost k8s]# bash cfssl.sh //下載cfssl官方包 % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 9.8M 100 9.8M 0 0 77052 0 0:02:14 0:02:14 --:--:-- 94447 % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 2224k 100 2224k 0 0 66701 0 0:00:34 0:00:34 --:--:-- 71949 % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 6440k 100 6440k 0 0 74368 0 0:01:28 0:01:28 --:--:-- 93942 [root@localhost k8s]# ls /usr/local/bin/ cfssl cfssl-certinfo cfssljson ##cfssl 生成證書工具、cfssljson通過傳入json文件生成證書、cfssl-certinfo查看證書信息
[root@localhost k8s]# cd etcd-cert/ cat > ca-config.json <<EOF { "signing": { "default": { "expiry": "87600h" }, "profiles": { "www": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF
cat > ca-csr.json <<EOF { "CN": "etcd CA", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing" } ] } EOF
cfssl gencert -initca ca-csr.json | cfssljson -bare ca - 2020/01/15 18:15:15 [INFO] generating a new CA key and certificate from CSR 2020/01/15 18:15:15 [INFO] generate received request 2020/01/15 18:15:15 [INFO] received CSR 2020/01/15 18:15:15 [INFO] generating key: rsa-2048 2020/01/15 18:15:15 [INFO] encoded CSR 2020/01/15 18:15:15 [INFO] signed certificate with serial number 661808851940283859099066838380794010566731982441
cat > server-csr.json <<EOF { "CN": "etcd", "hosts": [ "192.168.35.100", "192.168.35.101", "192.168.35.102" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing" } ] } EOF
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server www server-csr.json | cfssljson -bare server 2020/01/15 18:24:09 [INFO] generate received request 2020/01/15 18:24:09 [INFO] received CSR 2020/01/15 18:24:09 [INFO] generating key: rsa-2048 2020/01/15 18:24:09 [INFO] encoded CSR 2020/01/15 18:24:09 [INFO] signed certificate with serial number 613252568370198035643630635602034323043189506463 2020/01/15 18:24:09 [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@localhost etcd-cert]# cd /root/k8s/ [root@localhost k8s]# ls ##直接拉取到目錄下 cfssl.sh etcd.sh flannel-v0.10.0-linux-amd64.tar.gz etcd-cert etcd-v3.3.10-linux-amd64.tar.gz kubernetes-server-linux-amd64.tar.gz
[root@localhost k8s]# tar xf etcd-v3.3.10-linux-amd64.tar.gz [root@localhost k8s]# ls etcd-v3.3.10-linux-amd64 Documentation etcd etcdctl README-etcdctl.md README.md READMEv2-etcdctl.md [root@localhost k8s]# mkdir /opt/etcd/{cfg,bin,ssl} -p ##配置文件,命令文件,證書 [root@localhost k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/
##證書拷貝 [root@localhost k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/ ##進入卡住狀態等待其他節點加入 [root@localhost k8s]# bash etcd.sh etcd01 192.168.35.100 etcd02=https://192.168.35.101:2380,etcd03=https://192.168.35.102:2380
[root@localhost etcd-cert]# ps -ef | grep etcd root 81594 1 0 12:25 ? 00:00:18 /opt/etcd/bin/etcd --name=etcd01 --data-dir=/var/lib/etcd/default.etcd --listen-peer-urls=https://192.168.35.100:2380 --listen-client-urls=https://192.168.35.100:2379,http://127.0.0.1:2379 --advertise-client-urls=https://192.168.35.100:2379 --initial-advertise-peer-urls=https://192.168.35.100:2380 --initial-cluster=etcd01=https://192.168.35.100:2380,etcd02=https://192.168.35.101:2380,etcd03=https://192.168.35.102:2380 --initial-cluster-token=etcd-cluster --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 root 82044 79438 0 13:12 pts/0 00:00:00 grep --color=auto etcd
systemctl stop firewalld.service setenforce 0
[root@localhost k8s]# scp -r /opt/etcd/ root@192.168.35.101:/opt/ [root@localhost k8s]# scp -r /opt/etcd/ root@192.168.35.102:/opt
[root@localhost k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.35.101:/usr/lib/systemd/system/ [root@localhost k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.35.102:/usr/lib/systemd/system/
[root@localhost ~]# vim /opt/etcd/cfg/etcd #[Member] ETCD_NAME="etcd02" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.35.101:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.35.101:2379" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.35.101:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.35.101:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.35.128:2380,etcd02=https://192.168.35.195:2380,etcd03=https://192.168.35.138:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new"
[root@localhost ~]# vim /opt/etcd/cfg/etcd #[Member] ETCD_NAME="etcd03" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.35.102:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.35.102:2379" #[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.35.102:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.35.102:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.35.128:2380,etcd02=https://192.168.35.195:2380,etcd03=https://192.168.35.138:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new"
[root@localhost system]# cd /root/k8s/ [root@localhost k8s]# bash etcd.sh etcd01 192.168.35.100 etcd02=https://192.168.35.101:2380,etcd03=https://192.168.35.102:2380
[root@localhost ~]# systemctl start etcd [root@localhost ~]# systemctl status etcd
[root@localhost k8s]# bash etcd.sh etcd01 192.168.35.100 etcd02=https://192.168.35.101:2380,etcd03=https://192.168.35.102:2380
[root@localhost k8s]# cd etcd-cert/ [root@localhost etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379" cluster-health member 12a96220ac829a49 is healthy: got healthy result from https://192.168.35.195:2379 member 76797989afd0ecba is healthy: got healthy result from https://192.168.35.128:2379 member ff469df2baaba1da is healthy: got healthy result from https://192.168.35.138:2379 cluster is healthy
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce
systemctl stop firewalld.service setenforce 0
systemctl start docker.service systemctl enable docker.service
tee /etc/docker/daemon.json <<-'EOF' { "registry-mirrors": ["https://cz1numin.mirror.aliyuncs.com"] } EOF ##重載并重啟服務 systemctl daemon-reload systemctl restart docker
vim /etc/sysctl.conf net.ipv4.ip_forward=1 ##重載配置、重啟網卡、重啟服務 sysctl -p service network restart systemctl restart docker
[root@localhost etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}' { "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}
[root@localhost etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379" get /coreos.com/network/config { "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}
[root@localhost k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.35.101:/root root@192.168.35.101's password: flannel-v0.10.0-linux-amd64.tar.gz 100% 9479KB 66.6MB/s 00:00 [root@localhost k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.35.102:/root root@192.168.35.102's password: flannel-v0.10.0-linux-amd64.tar.gz 100% 9479KB 75.7MB/s 00:00
[root@localhost ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz flanneld mk-docker-opts.sh README.md
[root@localhost ~]# ls /opt/ containerd etcd rh [root@localhost ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p [root@localhost ~]# ls /opt/ containerd etcd kubernetes rh [root@localhost ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/ [root@localhost ~]# ls /opt/kubernetes/bin/ flanneld mk-docker-opts.sh [root@localhost ~]# vim flannel.sh #!/bin/bash ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"} cat <<EOF >/opt/kubernetes/cfg/flanneld FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \ -etcd-cafile=/opt/etcd/ssl/ca.pem \ -etcd-certfile=/opt/etcd/ssl/server.pem \ -etcd-keyfile=/opt/etcd/ssl/server-key.pem" EOF cat <<EOF >/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 EOF systemctl daemon-reload systemctl enable flanneld systemctl restart flanneld
[root@localhost ~]# bash flannel.sh https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379 Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.
[root@localhost ~]# vim /usr/lib/systemd/system/docker.service [Service] Type=notify # the default is not to use systemd for cgroups because the delegate issues still # exists and systemd currently does not support the cgroup feature set required # for containers run by docker EnvironmentFile=/run/flannel/subnet.env ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock ExecReload=/bin/kill -s HUP $MAINPID TimeoutSec=0 RestartSec=2 Restart=always
[root@localhost ~]# cat /run/flannel/subnet.env DOCKER_OPT_BIP="--bip=172.17.23.1/24" DOCKER_OPT_IPMASQ="--ip-masq=false" DOCKER_OPT_MTU="--mtu=1450" DOCKER_NETWORK_OPTIONS=" --bip=172.17.23.1/24 --ip-masq=false --mtu=1450"
[root@localhost ~]# systemctl daemon-reload [root@localhost ~]# systemctl restart docker
[root@localhost ~]# ifconfig docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.23.1 netmask 255.255.255.0 broadcast 172.17.23.255 ether 02:42:7d:9a:31:89 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 ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.35.101 netmask 255.255.255.0 broadcast 192.168.35.255 inet6 fe80::d4e2:ef9e:6820:145a prefixlen 64 scopeid 0x20<link> inet6 fe80::2a3:b621:ca01:463e prefixlen 64 scopeid 0x20<link> ether 00:0c:29:01:82:fd txqueuelen 1000 (Ethernet) RX packets 1148980 bytes 1135571843 (1.0 GiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 594986 bytes 64240523 (61.2 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 inet 172.17.23.0 netmask 255.255.255.255 broadcast 0.0.0.0 inet6 fe80::58e3:97ff:fe97:28f2 prefixlen 64 scopeid 0x20<link> ether 5a:e3:97:97:28: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 141 overruns 0 carrier 0 collisions 0
[root@localhost ~]# docker run -it centos:7 /bin/bash Unable to find image 'centos:7' locally 7: Pulling from library/centos ab5ef0e58194: Pull complete Digest: sha256:4a701376d03f6b39b8c2a8f4a8e499441b0d567f9ab9d58e4991de4472fb813c Status: Downloaded newer image for centos:7 [root@809ba7f7fdbe /]# yum install net-tools -y #安裝工具后才能使用ifconfig命令 [root@809ba7f7fdbe /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 inet 172.17.23.2 netmask 255.255.255.0 broadcast 172.17.23.255 ether 02:42:ac:11:17:02 txqueuelen 0 (Ethernet) RX packets 17384 bytes 13962588 (13.3 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 5915 bytes 323222 (315.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 loop txqueuelen 1 (Local Loopback) 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
注釋:這里過程就省略了,只看下重要的結果
[root@localhost ~]# vim /usr/lib/systemd/system/docker.service [root@localhost ~]# cat /run/flannel/subnet.env DOCKER_OPT_BIP="--bip=172.17.56.1/24" DOCKER_OPT_IPMASQ="--ip-masq=false" DOCKER_OPT_MTU="--mtu=1450" DOCKER_NETWORK_OPTIONS=" --bip=172.17.56.1/24 --ip-masq=false --mtu=1450"
[root@localhost ~]# ifconfig docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 inet 172.17.56.1 netmask 255.255.255.0 broadcast 172.17.56.255 ether 02:42:4b:66:50:5b 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 flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 inet 172.17.56.0 netmask 255.255.255.255 broadcast 0.0.0.0 inet6 fe80::50f6:daff:fe4e:af02 prefixlen 64 scopeid 0x20<link> ether 52:f6:da:4e:af:02 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 106 overruns 0 carrier 0 collisions 0
[root@localhost ~]# docker run -it centos:7 /bin/bash Unable to find image 'centos:7' locally 7: Pulling from library/centos ab5ef0e58194: Pull complete Digest: sha256:4a701376d03f6b39b8c2a8f4a8e499441b0d567f9ab9d58e4991de4472fb813c Status: Downloaded newer image for centos:7 [root@5d34e9d6766e /]# yum install net-tools -y [root@5d34e9d6766e /]# ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 inet 172.17.56.2 netmask 255.255.255.0 broadcast 172.17.56.255 ether 02:42:ac:11:38:02 txqueuelen 0 (Ethernet) RX packets 17199 bytes 13954199 (13.3 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 6723 bytes 367133 (358.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 loop txqueuelen 1 (Local Loopback) 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
[root@localhost ~]# ping 172.17.56.1 PING 172.17.56.1 (172.17.56.1) 56(84) bytes of data. 64 bytes from 172.17.56.1: icmp_seq=1 ttl=64 time=0.307 ms 64 bytes from 172.17.56.1: icmp_seq=2 ttl=64 time=0.385 ms 64 bytes from 172.17.56.1: icmp_seq=3 ttl=64 time=0.302 ms
[root@809ba7f7fdbe /]# ping 172.17.56.2 PING 172.17.56.2 (172.17.56.2) 56(84) bytes of data. 64 bytes from 172.17.56.2: icmp_seq=1 ttl=62 time=0.487 ms 64 bytes from 172.17.56.2: icmp_seq=2 ttl=62 time=0.273 ms 64 bytes from 172.17.56.2: icmp_seq=3 ttl=62 time=0.234 ms
[root@localhost k8s]# ls etcd-cert etcd-v3.3.10-linux-amd64.tar.gz master.zip etcd.sh flannel-v0.10.0-linux-amd64.tar.gz etcd-v3.3.10-linux-amd64 kubernetes-server-linux-amd64.tar.gz [root@localhost k8s]# unzip master.zip Archive: master.zip inflating: apiserver.sh inflating: controller-manager.sh inflating: scheduler.sh [root@localhost k8s]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p [root@localhost k8s]# mkdir k8s-cert #apiserver自簽證書目錄 [root@localhost k8s]# cd k8s-cert/ [root@localhost k8s-cert]# ls k8s-cert.sh //k8s-cert.sh腳本 cat > ca-config.json <<EOF { "signing": { "default": { "expiry": "87600h" }, "profiles": { "kubernetes": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF cat > ca-csr.json <<EOF { "CN": "kubernetes", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "k8s", "OU": "System" } ] } EOF cfssl gencert -initca ca-csr.json | cfssljson -bare ca - #----------------------- cat > server-csr.json <<EOF { "CN": "kubernetes", "hosts": [ "10.0.0.1", "127.0.0.1", "192.168.35.100", //master1 "192.168.35.103", //master2 "192.168.35.200", //vip "192.168.35.104", //nginx1(master) "192.168.35.105", //nginx2(backup) "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" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server #----------------------- cat > admin-csr.json <<EOF { "CN": "admin", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "system:masters", "OU": "System" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin #----------------------- cat > kube-proxy-csr.json <<EOF { "CN": "system:kube-proxy", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "BeiJing", "ST": "BeiJing", "O": "k8s", "OU": "System" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
[root@localhost k8s-cert]# bash k8s-cert.sh 2020/02/05 15:04:48 [INFO] generating a new CA key and certificate from CSR 2020/02/05 15:04:48 [INFO] generate received request 2020/02/05 15:04:48 [INFO] received CSR 2020/02/05 15:04:48 [INFO] generating key: rsa-2048 2020/02/05 15:04:49 [INFO] encoded CSR 2020/02/05 15:04:49 [INFO] signed certificate with serial number 213037901624270895781178406733487458634913677457 2020/02/05 15:04:49 [INFO] generate received request 2020/02/05 15:04:49 [INFO] received CSR 2020/02/05 15:04:49 [INFO] generating key: rsa-2048 2020/02/05 15:04:49 [INFO] encoded CSR 2020/02/05 15:04:49 [INFO] signed certificate with serial number 459900166635201812257861637517291405808825101980 2020/02/05 15:04:49 [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"). 2020/02/05 15:04:49 [INFO] generate received request 2020/02/05 15:04:49 [INFO] received CSR 2020/02/05 15:04:49 [INFO] generating key: rsa-2048 2020/02/05 15:04:49 [INFO] encoded CSR 2020/02/05 15:04:49 [INFO] signed certificate with serial number 229556723754610484918666718008179982380721010192 2020/02/05 15:04:49 [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"). 2020/02/05 15:04:49 [INFO] generate received request 2020/02/05 15:04:49 [INFO] received CSR 2020/02/05 15:04:49 [INFO] generating key: rsa-2048 2020/02/05 15:04:49 [INFO] encoded CSR 2020/02/05 15:04:49 [INFO] signed certificate with serial number 435030710152838930041815329750301323468065876772 2020/02/05 15:04:49 [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@localhost k8s-cert]# ls *pem admin-key.pem ca-key.pem kube-proxy-key.pem server-key.pem admin.pem ca.pem kube-proxy.pem server.pem [root@localhost k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/
[root@localhost k8s-cert]# cd .. [root@localhost k8s]# ls apiserver.sh flannel-v0.10.0-linux-amd64.tar.gz controller-manager.sh k8s-cert etcd-cert kubernetes-server-linux-amd64.tar.gz etcd.sh master.zip etcd-v3.3.10-linux-amd64 scheduler.sh etcd-v3.3.10-linux-amd64.tar.gz [root@localhost k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@localhost k8s]# cd /root/k8s/kubernetes/server/bin/ [root@localhost bin]# ls apiextensions-apiserver kube-controller-manager.tar cloud-controller-manager kubectl cloud-controller-manager.docker_tag kubelet cloud-controller-manager.tar kube-proxy hyperkube kube-proxy.docker_tag kubeadm kube-proxy.tar kube-apiserver kube-scheduler kube-apiserver.docker_tag kube-scheduler.docker_tag kube-apiserver.tar kube-scheduler.tar kube-controller-manager mounter kube-controller-manager.docker_tag [root@localhost bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/
[root@localhost k8s]# head -c 16 /dev/urandom | od -An -t x | tr -d ' ' b639a2717c79839fd7fab7bac97dca32 #隨機生成的序列號 [root@localhost k8s]# vim /opt/kubernetes/cfg/token.csv b639a2717c79839fd7fab7bac97dca32,kubelet-bootstrap,10001,"system:kubelet-bootstrap" ##序列號 用戶名 id 角色
[root@localhost k8s]# bash apiserver.sh 192.168.35.100 https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379 Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.
[root@localhost k8s]# ps aux | grep kube root 83786 92.7 14.4 358828 269812 ? Ssl 15:56 0:06 /opt/kubernetes/bin/kube-apiserver --logtostderr=true --v=4 --etcd-servers=https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379 --bind-address=192.168.35.100 --secure-port=6443 --advertise-address=192.168.35.100 --allow-privileged=true --service-cluster-ip-range=10.0.0.0/24 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction --authorization-mode=RBAC,Node --kubelet-https=true --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 root 83794 0.0 0.0 112676 980 pts/0 S+ 15:56 0:00 grep --color=auto kube
[root@localhost k8s]# cat /opt/kubernetes/cfg/kube-apiserver KUBE_APISERVER_OPTS="--logtostderr=true \ --v=4 \ --etcd-servers=https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379 \ --bind-address=192.168.35.100 \ --secure-port=6443 \ --advertise-address=192.168.35.100 \ --allow-privileged=true \ --service-cluster-ip-range=10.0.0.0/24 \ --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \ --authorization-mode=RBAC,Node \ --kubelet-https=true \ --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"
[root@localhost k8s]# netstat -ntap | grep 6443 tcp 0 0 192.168.35.100:6443 0.0.0.0:* LISTEN 83786/kube-apiserve tcp 0 0 192.168.35.100:44312 192.168.35.100:6443 ESTABLISHED 83786/kube-apiserve tcp 0 0 192.168.35.100:6443 192.168.35.100:44312 ESTABLISHED 83786/kube-apiserve [root@localhost k8s]# netstat -ntap | grep 8080 tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 83786/kube-apiserve
[root@localhost k8s]# ./scheduler.sh 127.0.0.1 Created symlink from /etc/systemd/system/multi-user.target.wants/kube-scheduler.service to /usr/lib/systemd/system/kube-scheduler.service. [root@localhost k8s]# ps aux | grep ku postfix 83202 0.0 0.2 91732 4008 ? S 15:10 0:00 pickup -l -t unix -u root 83786 4.3 18.3 427420 342812 ? Ssl 15:56 0:12 /opt/kubernetes/bin/kube-apiserver --logtostderr=true --v=4 --etcd-servers=https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379 --bind-address=192.168.35.100 --secure-port=6443 --advertise-address=192.168.35.100 --allow-privileged=true --service-cluster-ip-range=10.0.0.0/24 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction --authorization-mode=RBAC,Node --kbelet-https=true --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 root 83904 0.8 1.0 45360 20356 ? Ssl 16:01 0:00 /opt/kubernetes/bin/kube-scheduler --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect root 83912 0.0 0.0 112676 984 pts/0 R+ 16:01 0:00 grep --color=auto ku
[root@localhost k8s]# chmod +x controller-manager.sh [root@localhost k8s]# ./controller-manager.sh 127.0.0.1 Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.
[root@localhost k8s]# /opt/kubernetes/bin/kubectl get cs NAME STATUS MESSAGE ERROR scheduler Healthy ok controller-manager Healthy ok etcd-2 Healthy {"health":"true"} etcd-1 Healthy {"health":"true"} etcd-0 Healthy {"health":"true"}
[root@localhost k8s]# cd kubernetes/server/bin/ [root@localhost bin]# ls apiextensions-apiserver kube-controller-manager.tar cloud-controller-manager kubectl cloud-controller-manager.docker_tag kubelet cloud-controller-manager.tar kube-proxy hyperkube kube-proxy.docker_tag kubeadm kube-proxy.tar kube-apiserver kube-scheduler kube-apiserver.docker_tag kube-scheduler.docker_tag kube-apiserver.tar kube-scheduler.tar kube-controller-manager mounter kube-controller-manager.docker_tag [root@localhost bin]# scp kubelet kube-proxy root@192.168.35.101:/opt/kubernetes/bin/ root@192.168.35.101's password: kubelet 100% 168MB 87.4MB/s 00:01 kube-proxy 100% 48MB 90.9MB/s 00:00 [root@localhost bin]# scp kubelet kube-proxy root@192.168.35.102:/opt/kubernetes/bin/ root@192.168.35.102's password: kubelet 100% 168MB 93.4MB/s 00:01 kube-proxy 100% 48MB 100.5MB/s 00:00
[root@localhost ~]# ls anaconda-ks.cfg initial-setup-ks.cfg 公共 圖片 音樂 flannel.sh node.zip 模板 文檔 桌面 flannel-v0.10.0-linux-amd64.tar.gz README.md 視頻 下載 [root@localhost ~]# unzip node.zip Archive: node.zip inflating: proxy.sh inflating: kubelet.sh
[root@localhost k8s]# mkdir kubeconfig [root@localhost k8s]# cd kubeconfig/ [root@localhost kubeconfig]# ls kubeconfig.sh kubeconfig.sh腳本如下 : # 創建 TLS Bootstrapping Token #BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ') BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008 cat > token.csv <<EOF ${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap" EOF #---------------------- #此部分刪掉 APISERVER=$1 SSL_DIR=$2 # 創建kubelet bootstrapping kubeconfig export KUBE_APISERVER="https://$APISERVER:6443" # 設置集群參數 kubectl config set-cluster kubernetes \ --certificate-authority=$SSL_DIR/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=bootstrap.kubeconfig # 設置客戶端認證參數 kubectl config set-credentials kubelet-bootstrap \ --token=${BOOTSTRAP_TOKEN} \ --kubeconfig=bootstrap.kubeconfig # 設置上下文參數 kubectl config set-context default \ --cluster=kubernetes \ --user=kubelet-bootstrap \ --kubeconfig=bootstrap.kubeconfig # 設置默認上下文 kubectl config use-context default --kubeconfig=bootstrap.kubeconfig #---------------------- # 創建kube-proxy kubeconfig文件 kubectl config set-cluster kubernetes \ --certificate-authority=$SSL_DIR/ca.pem \ --embed-certs=true \ --server=${KUBE_APISERVER} \ --kubeconfig=kube-proxy.kubeconfig kubectl config set-credentials kube-proxy \ --client-certificate=$SSL_DIR/kube-proxy.pem \ --client-key=$SSL_DIR/kube-proxy-key.pem \ --embed-certs=true \ --kubeconfig=kube-proxy.kubeconfig kubectl config set-context default \ --cluster=kubernetes \ --user=kube-proxy \ --kubeconfig=kube-proxy.kubeconfig kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig
[root@localhost kubeconfig]# cat /opt/kubernetes/cfg/token.csv b639a2717c79839fd7fab7bac97dca32,kubelet-bootstrap,10001,"system:kubelet-bootstr
[root@localhost kubeconfig]# vim kubeconfig.sh # 設置客戶端認證參數 kubectl config set-credentials kubelet-bootstrap \ --token=b639a2717c79839fd7fab7bac97dca32 \ --kubeconfig=bootstrap.kubeconfig
[root@localhost kubeconfig]# vim /etc/profile //在末行插入 export PATH=$PATH:/opt/kubernetes/bin/ [root@localhost kubeconfig]# source /etc/profile #聲明 [root@localhost kubeconfig]# kubectl get cs #查看狀態 NAME STATUS MESSAGE ERROR scheduler Healthy ok controller-manager Healthy ok etcd-1 Healthy {"health":"true"} etcd-2 Healthy {"health":"true"} etcd-0 Healthy {"health":"true"}
[root@localhost kubeconfig]# mv kubeconfig.sh kubeconfig [root@localhost kubeconfig]# ls kubeconfig [root@localhost kubeconfig]# vim kubeconfig [root@localhost kubeconfig]# bash kubeconfig 192.168.35.100 /root/k8s/k8s-cert/ 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". [root@localhost kubeconfig]# ls bootstrap.kubeconfig kubeconfig kube-proxy.kubeconfig
[root@localhost kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.35.101:/opt/kubernetes/cfg/ root@192.168.35.101's password: bootstrap.kubeconfig 100% 2168 2.7MB/s 00:00 kube-proxy.kubeconfig 100% 6270 5.1MB/s 00:00 [root@localhost kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.35.102:/opt/kubernetes/cfg/ root@192.168.35.102's password: bootstrap.kubeconfig 100% 2168 1.8MB/s 00:00 kube-proxy.kubeconfig 100% 6270 5.9MB/s 00:00
[root@localhost kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created
[root@localhost ~]# bash kubelet.sh 192.168.35.101 Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@localhost ~]# ps aux | grep kube root 85079 0.0 0.8 300512 16424 ? Ssl 13:49 0:02 /opt/kubernetes/bin/flanneld --ip-masq --etcd-endpoints=https://192.168.35.100:2379,https://192.168.35.101:2379,https://192.168.35.102:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem root 109665 0.6 2.3 370688 42948 ? Ssl 18:46 0:00 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=192.168.35.101 --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 root 109762 0.0 0.0 112676 980 pts/0 S+ 18:47 0:00 grep --color=auto kube
[root@localhost ~]# systemctl status kubelet.service ● kubelet.service - Kubernetes Kubelet Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled) Active: active (running) since 三 2020-02-05 18:46:35 CST; 3min 1s ago Main PID: 109665 (kubelet) Memory: 61.6M CGroup: /system.slice/kubelet.service └─109665 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostnam... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.374771 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.601115 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.619113 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.619153 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.619192 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.619229 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.619294 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.619302 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.620575 109... 2月 05 18:46:35 localhost.localdomain kubelet[109665]: I0205 18:46:35.622388 109... Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost kubeconfig]# kubectl get csr NAME AGE REQUESTOR CONDITION node-csr-HF551kae9hkzNGwirEbd2uAiStXnawpEI-y7nLP4sTU 5m9s kubelet-bootstrap Pending Pending(等待集群給該節點頒發證書)
[root@localhost kubeconfig]# kubectl certificate approve node-csr-HF551kae9hkzNGwirEbd2uAiStXnawpEI-y7nLP4sTU certificatesigningrequest.certificates.k8s.io/node-csr-HF551kae9hkzNGwirEbd2uAiStXnawpEI-y7nLP4sTU approved
[root@localhost kubeconfig]# kubectl get csr NAME AGE REQUESTOR CONDITION node-csr-HF551kae9hkzNGwirEbd2uAiStXnawpEI-y7nLP4sTU 9m18s kubelet-bootstrap Approved,Issued Approved,Issued(已經被允許加入群集)
[root@localhost kubeconfig]# kubectl get node NAME STATUS ROLES AGE VERSION 192.168.35.101 Ready <none> 2m18s v1.12.3
[root@localhost ~]# bash proxy.sh 192.168.35.101 Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service. [root@localhost ~]# systemctl status kube-proxy.service ● kube-proxy.service - Kubernetes Proxy Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled) Active: active (running) since 三 2020-02-05 18:59:58 CST; 33s ago Main PID: 111731 (kube-proxy) Memory: 8.9M CGroup: /system.slice/kube-proxy.service ? 111731 /opt/kubernetes/bin/kube-proxy --logtostderr=true --v=4 --host... 2月 05 19:00:28 localhost.localdomain kube-proxy[111731]: I0205 19:00:28.692738 ... 2月 05 19:00:28 localhost.localdomain kube-proxy[111731]: I0205 19:00:28.695213 ... 2月 05 19:00:28 localhost.localdomain kube-proxy[111731]: I0205 19:00:28.713256 ... 2月 05 19:00:28 localhost.localdomain kube-proxy[111731]: I0205 19:00:28.724431 ... 2月 05 19:00:28 localhost.localdomain kube-proxy[111731]: I0205 19:00:28.727449 ... 2月 05 19:00:28 localhost.localdomain kube-proxy[111731]: I0205 19:00:28.727463 ... 2月 05 19:00:29 localhost.localdomain kube-proxy[111731]: I0205 19:00:29.754834 ... 2月 05 19:00:29 localhost.localdomain kube-proxy[111731]: I0205 19:00:29.799929 ... 2月 05 19:00:31 localhost.localdomain kube-proxy[111731]: I0205 19:00:31.754579 ... 2月 05 19:00:31 localhost.localdomain kube-proxy[111731]: I0205 19:00:31.797581 ... Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost ~]# scp -r /opt/kubernetes/ root@192.168.35.102:/opt/ The authenticity of host '192.168.35.102 (192.168.35.102)' can't be established. ECDSA key fingerprint is SHA256:JsLSnAul/dncM/HPvpJWWB09dHLzpIfArHv1fWjQyA8. ECDSA key fingerprint is MD5:d1:b7:d7:74:c6:4a:2a:7b:fc:33:8c:9c:3a:f2:6e:8a. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.35.102' (ECDSA) to the list of known hosts. root@192.168.35.102's password: flanneld 100% 238 100.8KB/s 00:00 bootstrap.kubeconfig 100% 2168 5.8MB/s 00:00 kube-proxy.kubeconfig 100% 6270 11.5MB/s 00:00 kubelet 100% 378 885.4KB/s 00:00 kubelet.config 100% 268 812.9KB/s 00:00 kubelet.kubeconfig 100% 2297 5.7MB/s 00:00 kube-proxy 100% 190 546.5KB/s 00:00 mk-docker-opts.sh 100% 2139 3.5MB/s 00:00 scp: /opt//kubernetes/bin/flanneld: Text file busy kubelet 100% 168MB 116.0MB/s 00:01 kube-proxy 100% 48MB 122.2MB/s 00:00 kubelet.crt 100% 2193 729.3KB/s 00:00 kubelet.key 100% 1675 3.5MB/s 00:00 kubelet-client-2020-02-05-18-55-07.pem 100% 1277 488.0KB/s 00:00 kubelet-client-current.pem 100% 1277 423.3KB/s 00:00
[root@localhost ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.35.102:/usr/lib/systemd/system/ root@192.168.35.102's password: kubelet.service 100% 264 113.9KB/s 00:00 kube-proxy.service 100% 231 529.7KB/s 00:00
[root@localhost ~]# cd /opt/kubernetes/ssl/ [root@localhost ssl]# rm -rf *
[root@localhost ssl]# cd ../cfg/ [root@localhost cfg]# ls bootstrap.kubeconfig kubelet kubelet.kubeconfig kube-proxy.kubeconfig flanneld kubelet.config kube-proxy [root@localhost cfg]# vim kubelet KUBELET_OPTS="--logtostderr=true \ --v=4 \ --hostname-override=192.168.35.102 \ --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" [root@localhost cfg]# vim kubelet.config kind: KubeletConfiguration apiVersion: kubelet.config.k8s.io/v1beta1 address: 192.168.35.102 port: 10250 readOnlyPort: 10255 cgroupDriver: cgroupfs clusterDNS: - 10.0.0.2 clusterDomain: cluster.local. failSwapOn: false authentication: anonymous: enabled: true [root@localhost cfg]# vim kube-proxy KUBE_PROXY_OPTS="--logtostderr=true \ --v=4 \ --hostname-override=192.168.35.102 \ --cluster-cidr=10.0.0.0/24 \ --proxy-mode=ipvs \ --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
[root@localhost cfg]# systemctl start kubelet.service [root@localhost cfg]# systemctl enable kubelet.service Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service. [root@localhost cfg]# systemctl start kube-proxy.service [root@localhost cfg]# systemctl enable kube-proxy.service Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.
[root@localhost kubeconfig]# kubectl get csr NAME AGE REQUESTOR CONDITION node-csr-HF551kae9hkzNGwirEbd2uAiStXnawpEI-y7nLP4sTU 32m kubelet-bootstrap Approved,Issued node-csr-TszRzIg1T7JcfFKuwrCb82bqv7mcwvX1xZD8KMQJZCY 2m25s kubelet-bootstrap Pending
[root@localhost kubeconfig]# kubectl certificate approve node-csr-TszRzIg1T7JcfFKuwrCb82bqv7mcwvX1xZD8KMQJZCY certificatesigningrequest.certificates.k8s.io/node-csr-TszRzIg1T7JcfFKuwrCb82bqv7mcwvX1xZD8KMQJZCY approved
[root@localhost kubeconfig]# kubectl get node NAME STATUS ROLES AGE VERSION 192.168.35.101 Ready <none> 24m v1.12.3 192.168.35.102 Ready <none> 17m v1.12.3
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