附018.K3S-ETCD高可用部署

一 K3S概述

1.1 K3S介紹

• 適用于：
• 邊緣計算-Edge
• 物聯網-IoT
• CI
• ARM

1.2 K3S特點

• 移除過時的功能、Alpha功能、非默認功能，這些功能在大多數Kubernetes集群中已不可用，
• 洗掉內置插件(比如云供應商插件和存盤插件)，可用外部插件程式替換，
• 添加SQLite3作為默認的資料存盤，etcd3仍然可用，但并非默認項，
• 包含在一個簡單的啟動程式當中，可以處理復雜的TLS和其他選項，
• 幾乎沒有作業系統依賴性（僅需要健全的內核和cgroup掛載），k3s軟體包所需的依賴：

• containerd
• Flannel
• CoreDNS
• CNI
• 主機系統服務 (iptables, socat, etc)

1.3 K3S架構

• 兩個或更多server節點；
• 一個外部資料存盤，

1.4 worker節點注冊

二 K3S部署規劃

2.1 節點需求

2.2 節點規劃

三 K3S部署準備

3.1 變數引數準備

  1 #!/bin/sh
  2 #****************************************************************#
  3 # ScriptName: environment.sh
  4 # Author: xhy
  5 # Create Date: 2020-05-13 12:21
  6 # Modify Author: xhy
  7 # Modify Date: 2020-05-13 12:21
  8 # Version: 
  9 #***************************************************************#
 10 
 11 # 集群 MASTER 機器 IP 陣列
 12 export MASTER_IPS=(172.24.12.11 172.24.12.12 172.24.12.13)
 13 
 14 # 集群 MASTER IP 對應的主機名陣列
 15 export MASTER_NAMES=(master01 master02 master03)
 16 
 17 # 集群 NODE 機器 IP 陣列
 18 export NODE_IPS=(172.24.12.21 172.24.12.22 172.24.12.23)
 19 
 20 # 集群 NODE IP 對應的主機名陣列
 21 export NODE_NAMES=(worker01 worker02 worker03)
 22 
 23 # 集群所有機器 IP 陣列
 24 export ALL_IPS=(172.24.12.11 172.24.12.12 172.24.12.13 172.24.12.21 172.24.12.22 172.24.12.23)
 25 
 26 # 集群所有IP 對應的主機名陣列
 27 export ALL_NAMES=(master01 master02 master03 worker01 worker02 worker03)
 28 
 29 # etcd 集群服務地址串列
 30 export ETCD_ENDPOINTS="https://172.24.12.11:2379,https://172.24.12.12:2379,https://172.24.12.13:2379"
 31 
 32 # etcd 集群間通信的 IP 和埠
 33 export ETCD_NODES="master01=https://172.24.12.11:2380,master02=https://172.24.12.12:2380,master03=https://172.24.12.13:2380"
 34 
 35 # 節點間互聯網路介面名稱
 36 export IFACE="eth0"
 37 
 38 # etcd 資料目錄
 39 export ETCD_DATA_DIR="/data/k3s/etcd/data"
 40 
 41 # etcd WAL 目錄，建議是 SSD 磁盤磁區，或者和 ETCD_DATA_DIR 不同的磁盤磁區
 42 export ETCD_WAL_DIR="/data/k3s/etcd/wal"

3.2 相關優化

  1 #!/bin/sh
  2 #****************************************************************#
  3 # ScriptName: k3sinit.sh
  4 # Author: xhy
  5 # Create Date: 2020-05-13 18:56
  6 # Modify Author: xhy
  7 # Modify Date: 2020-05-13 18:56
  8 # Version: 
  9 #***************************************************************#
 10 # Initialize the machine. This needs to be executed on every machine.
 11 
 12 # Disable the SELinux.
 13 sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
 14 
 15 # Turn off and disable the firewalld.
 16 systemctl stop firewalld
 17 systemctl disable firewalld
 18 
 19 # Modify related kernel parameters & Disable the swap.
 20 cat > /etc/sysctl.d/k3s.conf << EOF
 21 net.ipv4.ip_forward = 1
 22 net.bridge.bridge-nf-call-ip6tables = 1
 23 net.bridge.bridge-nf-call-iptables = 1
 24 net.ipv4.tcp_tw_recycle = 0
 25 vm.swappiness = 0
 26 vm.overcommit_memory = 1
 27 vm.panic_on_oom = 0
 28 net.ipv6.conf.all.disable_ipv6 = 1
 29 EOF
 30 sysctl -p /etc/sysctl.d/k8s.conf >&/dev/null
 31 swapoff -a
 32 sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
 33 modprobe br_netfilter
 34 
 35 # Add ipvs modules
 36 cat > /etc/sysconfig/modules/ipvs.modules <<EOF
 37 #!/bin/bash
 38 modprobe -- ip_vs
 39 modprobe -- ip_vs_rr
 40 modprobe -- ip_vs_wrr
 41 modprobe -- ip_vs_sh
 42 modprobe -- nf_conntrack_ipv4
 43 EOF
 44 chmod 755 /etc/sysconfig/modules/ipvs.modules
 45 bash /etc/sysconfig/modules/ipvs.modules
 46 
 47 # Install rpm
 48 yum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstat libseccomp wget

3.3 配置免秘鑰

  1 [root@master01 ~]# cat > etc/hosts << EOF
  2 172.24.12.11 master01
  3 172.24.12.12 master02
  4 172.24.12.13 master03
  5 172.24.12.21 worker01
  6 172.24.12.22 worker02
  7 172.24.12.23 worker03
  8 EOF

  1 [root@master01 ~]# source /root/environment.sh
  2 [root@master01 ~]# for all_ip in ${ALL_IPS[@]}
  3 do
  4 echo ">>> ${all_ip}"
  5 ssh-copy-id -i ~/.ssh/id_rsa.pub root@${all_ip}
  6 scp /etc/hosts root@${all_ip}:/etc/hosts
  7 scp environment.sh root@${all_ip}:/root/
  8 scp k3sinit.sh root@${all_ip}:/root/
  9 ssh root@${all_ip} "chmod +x /root/environment.sh"
 10 ssh root@${all_ip} "chmod +x /root/k3sinit.sh"
 11 ssh root@${all_ip} "bash /root/k3sinit.sh &"
 12 done

四 自定義證書

4.1 安裝cfssl

  1 [root@master01 ~]# curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl		#下載cfssl軟體
  2 [root@master01 ~]# chmod u+x /usr/local/bin/cfssl
  3 [root@master01 ~]# curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson	#下載json模板
  4 [root@master01 ~]# chmod u+x /usr/local/bin/cfssljson
  5 [root@master01 ~]# curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
  6 [root@master01 ~]# chmod u+x /usr/local/bin/cfssl-certinfo
  7 [root@master01 ~]# mkdir /opt/k3s/work
  8 [root@master01 ~]# cd /opt/k3s/work
  9 [root@master01 cert]# cfssl print-defaults config > config.json
 10 [root@master01 cert]# cfssl print-defaults csr > csr.json	#創建模版配置json檔案

4.2 創建根證書

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# cp config.json ca-config.json		#復制一份作為CA的組態檔
  3 [root@master01 work]# cat > ca-config.json <<EOF
  4 {
  5     "signing": {
  6         "default": {
  7             "expiry": "168h"
  8         },
  9         "profiles": {
 10             "kubernetes": {
 11                 "expiry": "87600h",
 12                 "usages": [
 13                     "signing",
 14                     "key encipherment",
 15                     "server auth",
 16                     "client auth"
 17                 ]
 18             }
 19         }
 20     }
 21 }
 22 EOF

• signing: 表示該證書可用于簽名其它證書；生成的ca.pem 證書中CA=TRUE；
• server auth: 表示client 可以用該CA 對server 提供的證書進行校驗；
• client auth: 表示server 可以用該CA 對client 提供的證書進行驗證，

  1 [root@master01 work]# cp csr.json ca-csr.json	#復制一份作為CA的證書簽名請求檔案
  2 [root@master01 work]# cat > ca-csr.json <<EOF
  3 {
  4     "CN": "kubernetes",
  5     "key": {
  6         "algo": "rsa",
  7         "size": 2048
  8     },
  9     "names": [
 10         {
 11             "C": "CN",
 12             "ST": "Shanghai",
 13             "L": "Shanghai",
 14             "O": "k3s",
 15             "OU": "System"
 16         }
 17     ]
 18 }
 19 EOF

• CN: Common Name，kube-apiserver 從證書中提取該欄位作為請求的用戶名(User Name)；瀏覽器使用該欄位驗證網站是否合法；
• C：country；
• ST：state；
• L：city；
• O: Organization，kube-apiserver 從證書中提取該欄位作為請求用戶所屬的組(Group)；
• OU：organization unit，

4.3 分發根證書

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01 work]# for all_ip in ${ALL_IPS[@]}
  4   do
  5     echo ">>> ${all_ip}"
  6     ssh root@${all_ip} "mkdir -p /etc/kubernetes/cert"
  7     scp ca*.pem ca-config.json root@${all_ip}:/etc/kubernetes/cert
  8   done

五 安裝ETCD

5.1 安裝ETCD

  1 [root@master01 ~]# wget https://github.com/coreos/etcd/releases/download/v3.4.7/etcd-v3.4.7-linux-amd64.tar.gz
  2 [root@master01 ~]# tar -xvf etcd-v3.4.7-linux-amd64.tar.gz

5.2 分發ETCD

  1 [root@master01 ~]# for master_ip in ${MASTER_IPS[@]}
  2   do
  3     echo ">>> ${master_ip}"
  4     scp etcd-v3.4.7-linux-amd64/etcd* root@${master_ip}:/usr/local/bin
  5     ssh root@${master_ip} "chmod +x /usr/local/bin/*"
  6     ssh root@${master_ip} "mkdir -p /data/k3s/etcd/data"
  7     ssh root@${master_ip} "mkdir -p /data/k3s/etcd/wal"
  8   done

5.3 創建etcd證書和密鑰

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 cert]# cat > etcd-csr.json <<EOF
  3 {
  4     "CN": "etcd",
  5     "hosts": [
  6         "127.0.0.1",
  7         "localhost",
  8         "172.24.12.11",
  9         "172.24.12.12",
 10         "172.24.12.13"
 11     ],
 12     "key": {
 13         "algo": "rsa",
 14         "size": 2048
 15     },
 16     "names": [
 17         {
 18             "C": "CN",
 19             "ST": "Shanghai",
 20             "L": "Shanghai",
 21             "O": "k3s",
 22             "OU": "System"
 23         }
 24     ]
 25 }
 26 EOF
 27 #創建etcd的CA證書請求檔案

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# cfssl gencert -ca=/opt/k3s/work/ca.pem \
  3 -ca-key=/opt/k3s/work/ca-key.pem -config=/opt/k3s/work/ca-config.json \
  4 -profile=kubernetes etcd-csr.json | cfssljson -bare etcd	#生成CA密鑰（ca-key.pem）和證書（ca.pem）

5.4 分發證書和私鑰

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ssh root@${master_ip} "mkdir -p /etc/etcd/cert"
  7     scp etcd*.pem root@${master_ip}:/etc/etcd/cert/
  8   done

5.5 創建etcd的systemd

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01 work]# cat > etcd.service.template <<EOF
  4 [Unit]
  5 Description=Etcd Server
  6 After=network.target
  7 After=network-online.target
  8 Wants=network-online.target
  9 Documentation=https://github.com/coreos
 10 
 11 [Service]
 12 Type=notify
 13 WorkingDirectory=${ETCD_DATA_DIR}
 14 ExecStart=/usr/local/bin/etcd \\
 15   --data-dir=${ETCD_DATA_DIR} \\
 16   --wal-dir=${ETCD_WAL_DIR} \\
 17   --name=##MASTER_NAME## \\
 18   --cert-file=/etc/etcd/cert/etcd.pem \\
 19   --key-file=/etc/etcd/cert/etcd-key.pem \\
 20   --trusted-ca-file=/etc/kubernetes/cert/ca.pem \\
 21   --peer-cert-file=/etc/etcd/cert/etcd.pem \\
 22   --peer-key-file=/etc/etcd/cert/etcd-key.pem \\
 23   --peer-trusted-ca-file=/etc/kubernetes/cert/ca.pem \\
 24   --peer-client-cert-auth \\
 25   --client-cert-auth \\
 26   --listen-peer-urls=https://##MASTER_IP##:2380 \\
 27   --initial-advertise-peer-urls=https://##MASTER_IP##:2380 \\
 28   --listen-client-urls=https://##MASTER_IP##:2379,http://127.0.0.1:2379 \\
 29   --advertise-client-urls=https://##MASTER_IP##:2379 \\
 30   --initial-cluster-token=etcd-cluster-0 \\
 31   --initial-cluster=${ETCD_NODES} \\
 32   --initial-cluster-state=new \\
 33   --auto-compaction-mode=periodic \\
 34   --auto-compaction-retention=1 \\
 35   --max-request-bytes=33554432 \\
 36   --quota-backend-bytes=6442450944 \\
 37   --heartbeat-interval=250 \\
 38   --election-timeout=2000
 39 Restart=on-failure
 40 RestartSec=5
 41 LimitNOFILE=65536
 42 
 43 [Install]
 44 WantedBy=multi-user.target
 45 EOF

5.5 修改etcd systemd相應地址

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01 work]# for (( i=0; i < 3; i++ ))
  4   do
  5     sed -e "s/##MASTER_NAME##/${MASTER_NAMES[i]}/" -e "s/##MASTER_IP##/${MASTER_IPS[i]}/" etcd.service.template > etcd-${MASTER_IPS[i]}.service
  6   done

5.6 分發etcd systemd

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01  work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     scp etcd-${master_ip}.service root@${master_ip}:/etc/systemd/system/etcd.service
  7   done

5.7 啟動ETCD

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01  work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ssh root@${master_ip} "mkdir -p ${ETCD_DATA_DIR} ${ETCD_WAL_DIR}"
  7     ssh root@${master_ip} "systemctl daemon-reload && systemctl enable etcd && systemctl restart etcd " &
  8   done

5.8 檢查ETCD啟動

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ssh root@${master_ip} "systemctl status etcd|grep Active"
  7   done

5.9 驗證服務狀態

  1 [root@master01 ~]# cd /opt/k3s/work
  2 [root@master01 work]# source /root/environment.sh
  3 [root@master01 work]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ETCDCTL_API=3 /usr/local/bin/etcdctl \
  7     --endpoints=https://${master_ip}:2379 \
  8     --cacert=/etc/kubernetes/cert/ca.pem \
  9     --cert=/etc/etcd/cert/etcd.pem \
 10     --key=/etc/etcd/cert/etcd-key.pem endpoint health
 11   done

5.10 查看ETCD當前leader

  1 [root@master01 ~]# source /root/environment.sh
  2 [root@master01 ~]# ETCDCTL_API=3 /usr/local/bin/etcdctl \
  3   -w table --cacert=/etc/kubernetes/cert/ca.pem \
  4   --cert=/etc/etcd/cert/etcd.pem \
  5   --key=/etc/etcd/cert/etcd-key.pem \
  6   --endpoints=${ETCD_ENDPOINTS} endpoint status

六 安裝K3S server

6.1 腳本安裝

  1 [root@master01 ~]# curl -sfL https://docs.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn \
  2 sh -s - server --write-kubeconfig ~/.kube/config \
  3 --datastore-endpoint='https://172.24.12.11:2379,master02=https://172.24.12.12:2379,master03=https://172.24.12.13:2379' --datastore-cafile=/etc/kubernetes/cert/ca.pem \
  4 --datastore-certfile=/etc/etcd/cert/etcd.pem \
  5 --datastore-keyfile=/etc/etcd/cert/etcd-key.pem \
  6 --token=x120952576 \
  7 --tls-san=172.24.12.254
  8 [root@master01 ~]# echo "source <(kubectl completion bash)" >> ~/.bashrc

• INSTALL_K3S_MIRROR：中國區用戶設定INSTALL_K3S_MIRROR=cn可加速K3S二進制檔案下載，也可以直接手動下載二進制檔案，
• INSTALL_K3S_SKIP_DOWNLOAD：如果設定為true，則不會下載K3s hash檔案或K3S二進制檔案，
• INSTALL_K3S_SYMLINK：如果設定為skip將不會創建軟鏈接，force將強制覆寫，如果path中不存在命令，則默認值為符號鏈接，
• INSTALL_K3S_SKIP_START：如果設定為true，將不會自動啟動K3s服務，
• INSTALL_K3S_VERSION：可從github下載的K3s版本，如果未指定，將嘗試下載latest版本，
• INSTALL_K3S_BIN_DIR：將K3S的二進制檔案，軟鏈接和卸載腳本安裝到的目錄，/usr/local/bin用作默認目錄，
• INSTALL_K3S_BIN_DIR_READ_ONLY：如果設定為true，則不會寫入檔案到INSTALL_K3S_BIN_DIR，如果需要強制寫入則設定INSTALL_K3S_SKIP_DOWNLOAD=true，
• INSTALL_K3S_SYSTEMD_DIR：將systemd服務和環境變數檔案安裝到的目錄，/etc/systemd/system用作默認目錄，
• INSTALL_K3S_EXEC：當未指定INSTALL_K3S_EXEC變數，或設定了K3S_URL變數，或在INSTALL_K3S_EXEC變數中沒有添加server執行命令，那么k3s默認將以agent角色運行，反之，會默認以server角色運行，最終，systemd命令會被決議為EXEC命令和腳本引數的組合（$@），
• INSTALL_K3S_NAME：如果未指定，將默認使用K3s exec命令創建的systemd服務的名稱，如果指定，名稱將以k3s-為前綴，
• INSTALL_K3S_TYPE：要創建的systemd服務型別，如果未指定，將默認使用K3s exec命令，

6.2 確認驗證

  1 [root@master01 ~]# kubectl get nodes

  1 [root@master01 ~]# kubectl taint node master01 node-role.kubernetes.io/master="":NoSchedule
  2 [root@master01 ~]# kubectl taint node master01 node-role.kubernetes.io/master="":NoSchedule
  3 [root@master01 ~]# kubectl taint node master01 node-role.kubernetes.io/master="":NoSchedule

七 高可用優化

7.1 Keepalived安裝

  1 [root@master01 ~]# for master_ip in ${MASTER_IPS[@]}
  2   do
  3     echo ">>> ${master_ip}"
  4     ssh root@${master_ip} "yum -y install gcc gcc-c++ make libnl libnl-devel libnfnetlink-devel openssl-devel"
  5     ssh root@${master_ip} "wget http://down.linuxsb.com:8888/software/keepalived-2.0.20.tar.gz"
  6     ssh root@${master_ip} "tar -zxvf keepalived-2.0.20.tar.gz"
  7     ssh root@${master_ip} "cd keepalived-2.0.20/ && ./configure --sysconf=/etc --prefix=/usr/local/keepalived && make && make install"
  8     ssh root@${master_ip} "systemctl enable keepalived && systemctl start keepalived"
  9   done

7.2 創建組態檔

  1 [root@master01 ~]# wget http://down.linuxsb.com:8888/k3s_ha.sh	#下載高可用自動配置腳本
  2 [root@master01 ~]# vi k3s_ha.sh 				#其他部分保持默認
  3 # master keepalived virtual ip address
  4 export K3SHA_VIP=172.24.12.254
  5 
  6 # master01 ip address
  7 export K3SHA_IP1=172.24.12.11
  8 
  9 # master02 ip address
 10 export K3SHA_IP2=172.24.12.12
 11 
 12 # master03 ip address
 13 export K3SHA_IP3=172.24.12.13
 14 
 15 # master01 hostname
 16 export K3SHA_HOST1=master01
 17 
 18 # master02 hostname
 19 export K3SHA_HOST2=master02
 20 
 21 # master03 hostname
 22 export K3SHA_HOST3=master03
 23 
 24 # master01 network interface name
 25 export K3SHA_NETINF1=eth0
 26 
 27 # master02 network interface name
 28 export K3SHA_NETINF2=eth0
 29 
 30 # master03 network interface name
 31 export K3SHA_NETINF3=eth0
 32 
 33 [root@master01 ~]# bash k3s_ha.sh

• keepalived：keepalived組態檔，位于各個master節點的/etc/keepalived目錄
• nginx-lb：nginx-lb負載均衡組態檔，位于各個master節點的/root/nginx-lb目錄

7.3 啟動Keepalived

  1 [root@master01 ~]# cat /etc/keepalived/keepalived.conf
  2 [root@master01 ~]# cat /etc/keepalived/check_apiserver.sh	確認Keepalived配置
  3 [root@master01 ~]# for master_ip in ${MASTER_IPS[@]}
  4   do
  5     echo ">>> ${master_ip}"
  6     ssh root@${master_ip} "systemctl restart keepalived.service"
  7     ssh root@${master_ip} "systemctl status keepalived.service"
  8     ssh root@${master_ip} "ping -c1 172.24.12.254"
  9   done

7.4 確認驗證

  1 [root@master01 ~]# kubectl -n kube-system get pods | grep -E 'NAME|nginx'
  2 NAME                                      READY   STATUS      RESTARTS   AGE
  3 nginx-lb-2dk6z                            1/1     Running     0          2m56s
  4 nginx-lb-68s47                            1/1     Running     0          2m56s
  5 nginx-lb-nbc9l                            1/1     Running     0          2m56s

7.5 啟用高可用

  1 [root@master01 ~]# vi /etc/rancher/k3s/k3s.yaml 
  2 ……
  3     server: https://172.24.12.254:16443
  4 ……

八 worker節點加入

8.1 worker節點加入集群

  1 [root@worker01 ~]# curl -sfL https://docs.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn \
  2 sh -s - agent --server https://172.24.12.254:16443 --token x120952576
  3 [root@worker01 ~]# echo "source <(kubectl completion bash)" >> ~/.bashrc

8.2 其他命令引數

  1 [root@master01 ~]# k3s server --help		#查看k3s server更多引數
  2 [root@worker01 ~]# k3s agent --help		#查看k3s agent更多引數

九 部署Longhorn

9.1 Longhorn概述

9.2 Longhorn部署

  1 [root@master01 ~]# yum -y install iscsi-initiator-utils

  1 [root@master01 ~]# wget \
  2 https://raw.githubusercontent.com/longhorn/longhorn/master/deploy/longhorn.yaml
  3 [root@master01 ~]# vi longhorn.yaml

  1 #……
  2 ---
  3 kind: Service
  4 apiVersion: v1
  5 metadata:
  6   labels:
  7     app: longhorn-ui
  8   name: longhorn-frontend
  9   namespace: longhorn-system
 10 spec:
 11   type: NodePort			#修改為nodeport
 12   selector:
 13     app: longhorn-ui
 14   ports:
 15   - port: 80
 16     targetPort: 8000
 17     nodePort: 8888
 18 ---
 19 #……

9.3 動態sc創建

  1 [root@master01 ~]# kubectl get sc
  2 NAME                   PROVISIONER             RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
  3 ……
  4 longhorn               driver.longhorn.io      Delete          Immediate              true                   15m

  1 [root@master01 ~]# vi longhornsc.yaml

  1 kind: StorageClass
  2 apiVersion: storage.k8s.io/v1
  3 metadata:
  4   name: longhornsc
  5 provisioner: rancher.io/longhorn
  6 parameters:
  7   numberOfReplicas: "3"
  8   staleReplicaTimeout: "30"
  9   fromBackup: ""

  1 [root@master01 ~]# kubectl create -f longhornsc.yaml

9.4 測驗PV及PVC

  1 [root@master01 ~]# vi longhornpod.yaml

  1 apiVersion: v1
  2 kind: PersistentVolumeClaim
  3 metadata:
  4   name: longhorn-pvc
  5 spec:
  6   accessModes:
  7     - ReadWriteOnce
  8   storageClassName: longhorn
  9   resources:
 10     requests:
 11       storage: 2Gi
 12 ---
 13 apiVersion: v1
 14 kind: Pod
 15 metadata:
 16   name: longhorn-pod
 17   namespace: default
 18 spec:
 19   containers:
 20   - name: volume-test
 21     image: nginx:stable-alpine
 22     imagePullPolicy: IfNotPresent
 23     volumeMounts:
 24     - name: volv
 25       mountPath: /data
 26     ports:
 27     - containerPort: 80
 28   volumes:
 29   - name: volv
 30     persistentVolumeClaim:
 31       claimName: longhorn-pvc
 32 

  1 [root@master01 ~]# kubectl create -f longhornpod.yaml 

標籤：Linux

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