k8s集群部署之环境介绍与etcd数据库集群部署
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k8s集群部署之环境介绍与etcd数据库集群部署
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| 角色 | IP | 組件 | 配置 |
| master-1 | 192.168.10.11 | kube-apiserver kube-controller-manager kube-scheduler etcd | 2c 2g |
| master-2 | 192.168.10.12 | kube-apiserver kube-controller-manager kube-scheduler etcd | 2c 2g |
| node-1 | 192.168.10.13 | kubelet kube-proxy docker flannel etcd | 2c 2g |
| node-2 | 192.168.10.14 | kubelet kube-proxy docker flannel | 2c 2g |
| nginx負載主 | 192.168.10.15 192.168.10.20（vip） | nginx | 2c 2g |
| nginx負載備 | 192.168.10.16 | nginx | 2c 2g |
| Registry | 192.168.10.17 | harbor | 2c 2g |
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多master集群 架構圖
環境準備，關閉SELinux
[root@mast-1 ~]# vi /etc/selinux/config # This file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead of enforcing. # disabled - No SELinux policy is loaded. SELINUX=disabled 永久關閉 # SELINUXTYPE= can take one of three two values: # targeted - Targeted processes are protected, # minimum - Modification of targeted policy. Only selected processes are protected. # mls - Multi Level Security protection. SELINUXTYPE=targeted [root@mast-1 ~]# setenforce 0 [root@mast-1 ~]# systemctl stop firewalld.service [root@mast-1 ~]# systemctl disable firewalld.service生成自簽證書
[root@mast-1 ~]# mkdir k8s/{k8s-cert,etcd-cert} -p [root@mast-1 ~]# cd k8s/ [root@mast-1 k8s]# ls etcd-cert k8s-cert [root@mast-1 k8s]# cd etcd-cert/ [root@mast-1 etcd-cert]# cat etcd-cert.sh cat > ca-config.json <<EOF {"signing": {"default": {"expiry": "87600h"},"profiles": {"www": {"expiry": "87600h","usages": ["signing","key encipherment","server auth","client auth"]}}} } EOFcat > ca-csr.json <<EOF {"CN": "etcd CA","key": {"algo": "rsa","size": 2048},"names": [{"C": "CN","L": "Beijing","ST": "Beijing"}] } EOFcfssl 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"}] } EOFcfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server時間同步 [root@mast-1 etcd-cert]# ntpdate time.windows.com 19 Apr 18:08:01 ntpdate[18507]: adjust time server 52.175.49.4 offset -0.038617 sec 安裝工具 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 生成證書 [root@mast-1 etcd-cert]# bash etcd-cert.sh 2019/04/19 18:12:51 [INFO] generating a new CA key and certificate from CSR 2019/04/19 18:12:51 [INFO] generate received request 2019/04/19 18:12:51 [INFO] received CSR 2019/04/19 18:12:51 [INFO] generating key: rsa-2048 2019/04/19 18:12:52 [INFO] encoded CSR 2019/04/19 18:12:52 [INFO] signed certificate with serial number 68673429772362340986397269642150956332201052001 2019/04/19 18:12:52 [INFO] generate received request 2019/04/19 18:12:52 [INFO] received CSR 2019/04/19 18:12:52 [INFO] generating key: rsa-2048 2019/04/19 18:12:53 [INFO] encoded CSR 2019/04/19 18:12:53 [INFO] signed certificate with serial number 481813885977621272201720696275880807248023743489 2019/04/19 18:12:53 [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@mast-1 etcd-cert]# ls ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem etcd-cert.sh server.csr server-csr.json server-key.pem server.pem 生成CA證書 [root@mast-1 etcd-cert]# cat > ca-config.json <<EOF > { > "signing": { > "default": { > "expiry": "87600h" > }, > "profiles": { > "www": { > "expiry": "87600h", > "usages": [ > "signing", > "key encipherment", > "server auth", > "client auth" > ] > } > } > } > } > EOF [root@mast-1 etcd-cert]# [root@mast-1 etcd-cert]# cat > ca-csr.json <<EOF > { > "CN": "etcd CA", > "key": { > "algo": "rsa", > "size": 2048 > }, > "names": [ > { > "C": "CN", > "L": "Beijing", > "ST": "Beijing" > } > ] > } > EOF [root@mast-1 etcd-cert]# [root@mast-1 etcd-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca - 2019/04/19 18:21:15 [INFO] generating a new CA key and certificate from CSR 2019/04/19 18:21:15 [INFO] generate received request 2019/04/19 18:21:15 [INFO] received CSR 2019/04/19 18:21:15 [INFO] generating key: rsa-2048 2019/04/19 18:21:15 [INFO] encoded CSR 2019/04/19 18:21:15 [INFO] signed certificate with serial number 601159451155869323088996388702263627368633639404 [root@mast-1 etcd-cert]# ls ca-config.json ca.csr ca-csr.json ca-key.pem ca.pem 生成etcd證書 [root@mast-1 etcd-cert]# cat > server-csr.json <<EOF > { > "CN": "etcd", > "hosts": [ > "192.168.10.11", > "192.168.10.12", > "192.168.10.13" > ], > "key": { > "algo": "rsa", > "size": 2048 > }, > "names": [ > { > "C": "CN", > "L": "BeiJing", > "ST": "BeiJing" > } > ] > } > EOF [root@mast-1 etcd-cert]# [root@mast-1 etcd-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server 2019/04/19 18:26:38 [INFO] generate received request 2019/04/19 18:26:38 [INFO] received CSR 2019/04/19 18:26:38 [INFO] generating key: rsa-2048 2019/04/19 18:26:38 [INFO] encoded CSR 2019/04/19 18:26:38 [INFO] signed certificate with serial number 20600129498404647940919904437550435044516988458 2019/04/19 18:26:38 [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").ETCD數據庫集群部署
[root@mast-1 ~]# mkdir APP [root@mast-1 ~]# mv etcd-v3.3.10-linux-amd64.tar.gz APP/ [root@mast-1 ~]# cd APP/ [root@mast-1 APP]# ls etcd-v3.3.10-linux-amd64.tar.gz [root@mast-1 APP]# ls etcd-v3.3.10-linux-amd64.tar.gz [root@mast-1 APP]# tar xf etcd-v3.3.10-linux-amd64.tar.gz [root@mast-1 APP]# ls etcd-v3.3.10-linux-amd64 etcd-v3.3.10-linux-amd64.tar.gz [root@mast-1 APP]# cd etcd-v3.3.10-linux-amd64/ [root@mast-1 etcd-v3.3.10-linux-amd64]# ls Documentation etcd etcdctl README-etcdctl.md README.md READMEv2-etcdctl.md [root@mast-1 etcd-v3.3.10-linux-amd64]# mkdir -pv /opt/etcd/{cfg,bin,ssl} mkdir: 已創建目錄 "/opt/etcd" mkdir: 已創建目錄 "/opt/etcd/cfg" mkdir: 已創建目錄 "/opt/etcd/bin" mkdir: 已創建目錄 "/opt/etcd/ssl" [root@mast-1 etcd-v3.3.10-linux-amd64]# mv etcd etcdctl /opt/etcd/bin/ [root@mast-1 etcd-v3.3.10-linux-amd64]# cd ~/k8s/ [root@mast-1 k8s]# ls etcd-cert etcd.sh k8s-cert 生成etcd配置文件腳本 [root@mast-1 k8s]# cat 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=$3WORK_DIR=/opt/etcdcat <<EOF >$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,${ETCD_CLUSTER}" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" EOFcat <<EOF >/usr/lib/systemd/system/etcd.service [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target[Service] Type=notify EnvironmentFile=${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 EOFsystemctl daemon-reload systemctl enable etcd systemctl restart etcd啟動有問題 [root@mast-1 k8s]# ./etcd.sh etcd01 192.168.10.11 etcd02=https://192.168.10.12:2380,etcd03=https://192.168.10.13:2380 Job for etcd.service failed because the control process exited with error code. See "systemctl status etcd.service" and "journalctl -xe" for details. 查看配置文件 [root@mast-1 k8s]# cat /opt/etcd/cfg/etcd #[Member] ETCD_NAME="etcd01" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.10.11:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.10.11:2379"#[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.10.11:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.10.11:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.10.11:2380,etcd02=https://192.168.10.12:2380,etcd03=https://192.168.10.13:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new"復制證書 [root@mast-1 k8s]# cp etcd-cert/{ca,server-key,server}.pem /opt/etcd/ssl/ [root@mast-1 k8s]# systemctl start etcd [root@mast-1 ~]# tail -10 /var/log/messages Apr 19 18:59:01 localhost etcd: 6571fb7574e87dba [logterm: 1, index: 3] sent MsgVote request to d1fbb74bc6a61e5c at term 55 Apr 19 18:59:02 localhost etcd: 6571fb7574e87dba is starting a new election at term 55 Apr 19 18:59:02 localhost etcd: 6571fb7574e87dba became candidate at term 56 Apr 19 18:59:02 localhost etcd: 6571fb7574e87dba received MsgVoteResp from 6571fb7574e87dba at term 56 Apr 19 18:59:02 localhost etcd: 6571fb7574e87dba [logterm: 1, index: 3] sent MsgVote request to d1fbb74bc6a61e5c at term 56 Apr 19 18:59:02 localhost etcd: 6571fb7574e87dba [logterm: 1, index: 3] sent MsgVote request to 9b449b0ff1d4c375 at term 56 Apr 19 18:59:03 localhost etcd: health check for peer 9b449b0ff1d4c375 could not connect: dial tcp 192.168.10.12:2380: connect: connection refused (prober "ROUND_TRIPPER_RAFT_MESSAGE") Apr 19 18:59:03 localhost etcd: health check for peer d1fbb74bc6a61e5c could not connect: dial tcp 192.168.10.13:2380: connect: connection refused (prober "ROUND_TRIPPER_SNAPSHOT") Apr 19 18:59:03 localhost etcd: health check for peer 9b449b0ff1d4c375 could not connect: dial tcp 192.168.10.12:2380: connect: connection refused (prober "ROUND_TRIPPER_SNAPSHOT") Apr 19 18:59:03 localhost etcd: health check for peer d1fbb74bc6a61e5c could not connect: dial tcp 192.168.10.13:2380: connect: connection refused (prober "ROUND_TRIPPER_RAFT_MESSAGE")將etcd拷貝其他節點 [root@mast-1 k8s]# scp -r /opt/etcd 192.168.10.12:/opt/ The authenticity of host '192.168.10.12 (192.168.10.12)' can't be established. ECDSA key fingerprint is SHA256:K3leIm01q6LfP3t9FEMEtJq0njLut9ZzCGxcHUEWSDk. ECDSA key fingerprint is MD5:db:5c:1e:fd:4c:e4:fc:b2:bd:63:b9:81:92:5e:fd:f5. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.10.12' (ECDSA) to the list of known hosts. root@192.168.10.12's password: etcd 100% 509 54.0KB/s 00:00 etcd 100% 18MB 19.5MB/s 00:00 etcdctl 100% 15MB 8.9MB/s 00:01 ca.pem 100% 1265 43.5KB/s 00:00 server-key.pem 100% 1675 242.4KB/s 00:00 server.pem 100% 1338 304.7KB/s 00:00 [root@mast-1 k8s]# scp -r /opt/etcd 192.168.10.13:/opt/ The authenticity of host '192.168.10.13 (192.168.10.13)' can't be established. ECDSA key fingerprint is SHA256:UB3BsWnL8Kd/kNjYziPzdMZFo8ucoJn49Ar7TkFaOUI. ECDSA key fingerprint is MD5:31:d0:3c:eb:60:bd:0a:55:df:72:da:d3:4d:67:16:e6. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.10.13' (ECDSA) to the list of known hosts. root@192.168.10.13's password: etcd 100% 509 197.1KB/s 00:00 etcd 100% 18MB 6.8MB/s 00:02 etcdctl 100% 15MB 15.1MB/s 00:01 ca.pem 100% 1265 12.2KB/s 00:00 server-key.pem 100% 1675 27.0KB/s 00:00 server.pem [root@mast-1 k8s]# scp /usr/lib/systemd/system/etcd.service 192.168.10.12:/usr/lib/systemd/system root@192.168.10.12's password: etcd.service 100% 923 28.2KB/s 00:00 [root@mast-1 k8s]# scp /usr/lib/systemd/system/etcd.service 192.168.10.13:/usr/lib/systemd/system root@192.168.10.13's password: etcd.service 修改etcd2 的配置文件節點名字與IP地址[root@mast-2 cfg]# vi etcd #[Member] ETCD_NAME="etcd02" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.10.12:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.10.12:2379"#[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.10.12:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.10.12:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.10.11:2380,etcd02=https://192.168.10.12:2380,etcd03=https://192.168.10.13:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" 修改etcd3 的配置文件節點名字與IP地址 [root@node-1 cfg]# vi etcd #[Member] ETCD_NAME="etcd03" ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_PEER_URLS="https://192.168.10.13:2380" ETCD_LISTEN_CLIENT_URLS="https://192.168.10.13:2379"#[Clustering] ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.10.13:2380" ETCD_ADVERTISE_CLIENT_URLS="https://192.168.10.13:2379" ETCD_INITIAL_CLUSTER="etcd01=https://192.168.10.11:2380,etcd02=https://192.168.10.12:2380,etcd03=https://192.168.10.13:2380" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" ETCD_INITIAL_CLUSTER_STATE="new" 啟動節點1 [root@mast-1 k8s]# systemctl start etcd 啟動節點2 [root@mast-2 cfg]# systemctl daemon-reload [root@mast-2 cfg]# systemctl start etcd [root@mast-2 cfg]# 啟動節點3 [root@node-1 cfg]# systemctl daemon-reload [root@node-1 cfg]# systemctl start etcd [root@node-1 cfg]# vi etcd [root@mast-1 ~]# tail -10 /var/log/messages Apr 19 19:16:44 localhost etcd: server is likely overloaded Apr 19 19:17:02 localhost etcd: failed to send out heartbeat on time (exceeded the 100ms timeout for 1.126288546s) Apr 19 19:17:02 localhost etcd: server is likely overloaded Apr 19 19:17:02 localhost etcd: failed to send out heartbeat on time (exceeded the 100ms timeout for 1.12637708s) Apr 19 19:17:02 localhost etcd: server is likely overloaded Apr 19 19:17:02 localhost etcd: 6571fb7574e87dba [term: 634] received a MsgAppResp message with higher term from d1fbb74bc6a61e5c [term: 635] Apr 19 19:17:02 localhost etcd: 6571fb7574e87dba became follower at term 635 Apr 19 19:17:02 localhost etcd: raft.node: 6571fb7574e87dba lost leader 6571fb7574e87dba at term 635 Apr 19 19:17:02 localhost etcd: 6571fb7574e87dba [logterm: 634, index: 9, vote: 0] cast MsgVote for 9b449b0ff1d4c375 [logterm: 634, index: 9] at term 635 Apr 19 19:17:02 localhost etcd: raft.node: 6571fb7574e87dba elected leader 9b449b0ff1d4c375 at term 635檢查集群監控狀態，數據端口 [root@mast-1 ~]# /opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.10.11:2379,http s://192.168.10.12:2379,https://192.168.10.13:2379" cluster-healthmember 6571fb7574e87dba is healthy: got healthy result from https://192.168.10.11:2379 member 9b449b0ff1d4c375 is healthy: got healthy result from https://192.168.10.12:2379 member d1fbb74bc6a61e5c is healthy: got healthy result from https://192.168.10.13:2379 cluster is healthy
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轉載于:https://www.cnblogs.com/rdchenxi/p/10735346.html
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