k8s集群部署之环境介绍与etcd数据库集群部署

角色	IP	组件	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负载主	192.168.10.15 192.168.10.20（vip）	nginx	2c 2g
nginx负载备	192.168.10.16	nginx	2c 2g
Registry	192.168.10.17	harbor	2c 2g

多master集群架构图

环境准备，关闭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    永久关闭
# 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

生成自签证书

[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时间同步
[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
安装工具
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
生成证书
[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证书
[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证书
[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数据库集群部署　

[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: 已创建目录 "/opt/etcd"
mkdir: 已创建目录 "/opt/etcd/cfg"
mkdir: 已创建目录 "/opt/etcd/bin"
mkdir: 已创建目录 "/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配置文件脚本
[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启动有问题
[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"复制证书
[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")将etcd拷贝其他节点
[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 的配置文件节点名字与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 的配置文件节点名字与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"
启动节点1
[root@mast-1 k8s]# systemctl start etcd
启动节点2
[root@mast-2 cfg]# systemctl daemon-reload
[root@mast-2 cfg]# systemctl start etcd
[root@mast-2 cfg]#
启动节点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检查集群监控状态，数据端口
[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

转载于:https://www.cnblogs.com/rdchenxi/p/10735346.html

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