etcd多台部署,启用https以及ca自签名
原创内容,转载请注明出处
博主地址:https://aronligithub.github.io/
前言
在经过上一篇章关于etcd单台部署,启用https以及ca自签名,这个篇章就是介绍以及演示三台etcd部署以及使用CFSSL来生成CA证书
环境要求
1、三台安装centos7的服务器
2、具备访问互联网
3、关闭服务器的防火墙以及selinux
服务器拓扑
etcd集群拓扑
服务器部署组件以及IP清单
host name | 服务器IP | etcd节点name |
---|---|---|
server81 | 172.16.5.81 | infra1 |
server86 | 172.16.5.86 | infra2 |
server87 | 172.16.5.87 | infra3 |
CFSSL工具的安装
下载CFSSL的可执行二进制文件
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64chmod +x cfssl*
下载执行过程截图如下
安装wget工具
下载文件的过程
给文件添加执行权限
将这三个二进制可执行文件,修改名称复制到/usr/local/bin/下
cp -v cfssl_linux-amd64 /usr/local/bin/cfssl cp -v cfssljson_linux-amd64 /usr/local/bin/cfssljson cp -v cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo ls /usr/local/bin/cfssl*
复制可执行文件至指定目录
使用CFSSL创建CA证书以及etcd的TLS认证证书
创建 CA (Certificate Authority)
创建 CA 配置文件(ca-config.json)
[root@server81 etcdSSl]# vim ca-config.json{ "signing": { "default": { "expiry": "876000h" }, "profiles": { "etcd": { "usages": [ "signing", "key encipherment", "default": { "expiry": "876000h" }, "profiles": { "etcd": { "usages": [ "signing", "key encipherment", "server auth", "client auth" ], "expiry": "876000h" } } } }
创建CA配置文件
"字段说明""ca-config.json":可以定义多个 profiles,分别指定不同的过期时间、使用场景等参数;后续在签名证书时使用某个 profile;"signing":表示该证书可用于签名其它证书;生成的 ca.pem 证书中 CA=TRUE;"server auth":表示client可以用该 CA 对server提供的证书进行验证;"client auth":表示server可以用该CA对client提供的证书进行验证;
创建 CA 证书签名请求(ca-csr.json)
[root@server81 etcdSSl]# vim ca-csr.json{ "CN": "etcd", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "shenzhen", "L": "shenzhen", "O": "etcd", "OU": "System" } ] }
创建CA签名请求
"CN":Common Name,etcd 从证书中提取该字段作为请求的用户名 (User Name);浏览器使用该字段验证网站是否合法;"O":Organization,etcd 从证书中提取该字段作为请求用户所属的组 (Group); 这两个参数在后面的kubernetes启用RBAC模式中很重要,因为需要设置kubelet、admin等角色权限,那么在配置证书的时候就必须配置对了,具体后面在部署kubernetes的时候会进行讲解。"在etcd这两个参数没太大的重要意义,跟着配置就好。"
生成 CA 证书和私钥
cfssl gencert -initca ca-csr.json | cfssljson -bare ca 说明:生成 "ca-csr.json ca-key.pem ca.pem" 三个文件
ca根证书的生成过程
创建etcd的TLS认证证书
创建 etcd证书签名请求(etcd-csr.json)
[root@server81 etcdSSl]# vim etcd-csr.json{ "CN": "etcd", "hosts": [ "127.0.0.1", "172.16.5.81", "172.16.5.86", "172.16.5.87" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "ST": "shenzhen", "L": "shenzhen", "O": "etcd", "OU": "System" } ] }
创建etcd证书签名请求
[^_^]: 如果 hosts 字段不为空,则需要指定授权使用该证书的 IP 或域名列表。[>_<]: 该证书被 etcd 集群使用,所以填写三台etcd服务器的IP即可。
生成 etcd证书和私钥
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=etcd etcd-csr.json | cfssljson -bare etcd [^_^]: 生成 "etcd-csr.json etcd-key.pem etcd.pem" 三个文件。
生成etcd证书以及私钥
将TLS 认证文件拷贝至证书目录下
mkdir -p /etc/etcd/etcdSSL cp * /etc/etcd/etcdSSL [^_^]: 存在CA证书的路径"/etc/etcd/etcdSSL"是自定义的,看个人习惯创建即可。
Server81 安装etcd服务
yum install -y etcd
yum安装etcd
配置 etcd 的 service文件(/usr/lib/systemd/system)
root@server81 ~]# vim /usr/lib/systemd/system/etcd.service [Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target [Service] Type=notify WorkingDirectory=/var/lib/etcd/ EnvironmentFile=-/etc/etcd/etcd.conf# set GOMAXPROCS to number of processorsExecStart=/usr/bin/etcd \ --name ${ETCD_NAME} \ --cert-file=/etc/etcd/etcdSSL/etcd.pem \ --key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --peer-cert-file=/etc/etcd/etcdSSL/etcd.pem \ --peer-key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \ --peer-trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \ --initial-advertise-peer-urls ${ETCD_INITIAL_ADVERTISE_PEER_URLS} \ --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-cluster-token ${ETCD_INITIAL_CLUSTER_TOKEN} \ --initial-cluster infra1=https://172.16.5.81:2380,infra2=https://172.16.5.86:2380,infra3=https://172.16.5.87:2380 \ --initial-cluster-state new \ --data-dir=${ETCD_DATA_DIR}Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target
在server81节点服务器,配置etcd的service文件
参数说明:1、指定 etcd 的工作目录为 /var/lib/etcd,数据目录为 /var/lib/etcd,需在启动服务前创建这两个目录; 在配置中的命令是这条: WorkingDirectory=/var/lib/etcd/2、为了保证通信安全,需要指定 etcd 的公私钥(cert-file和key-file)、Peers 通信的公私钥和 CA 证书(peer-cert-file、peer-key-file、peer-trusted-ca-file)、客户端的CA证书(trusted-ca-file); 在配置中添加etcd证书的命令是以下: --cert-file=/etc/etcd/etcdSSL/etcd.pem \ --key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --peer-cert-file=/etc/etcd/etcdSSL/etcd.pem \ --peer-key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \ --peer-trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \3、配置etcd的endpoint: --initial-cluster infra1=https://172.16.5.81:2380,infra2=https://172.16.5.86:2380,infra3=https://172.16.5.87:2380 \4、配置etcd的监听服务集群: --initial-advertise-peer-urls ${ETCD_INITIAL_ADVERTISE_PEER_URLS} \ --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} \5、配置etcd创建的集群为新集群,则定义集群状态为new --initial-cluster-state 值为 new6、定义etcd节点的名称,该名称等下从配置文件中获取: --name ${ETCD_NAME} \ 其中配置文件:EnvironmentFile=-/etc/etcd/etcd.conf
etcd的配置文件(/etc/etcd/etcd.conf)
[root@server81 ~]# vim /etc/etcd/etcd.conf#[member]ETCD_NAME=infra1 ETCD_DATA_DIR="/var/lib/etcd"ETCD_LISTEN_PEER_URLS="https://172.16.5.81:2380"ETCD_LISTEN_CLIENT_URLS="https://172.16.5.81:2379"#[cluster]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.5.81:2380"ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"ETCD_ADVERTISE_CLIENT_URLS="https://172.16.5.81:2379"
etcd节点的参数配置文件
这是172.16.5.81节点的配置,如果配置其他etcd节点只要将上面的IP地址改成相应节点的IP地址即可。
启动 etcd 服务
systemctl daemon-reload systemctl start etcd systemctl status etcd
启动server81的etcd服务
到了这里基本etcd的证书以及Server81的etcd节点服务已经配置好了,下面就是快速部署配置一下Server86/87两台服务器的etcd证书以及服务。
Server86安装etcd服务
yum install -y etcd
yum安装etcd
配置 etcd 的 service文件(/usr/lib/systemd/system)
[root@server86 ~]# vim /usr/lib/systemd/system/etcd.service[Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target [Service] Type=notify WorkingDirectory=/var/lib/etcd/ EnvironmentFile=-/etc/etcd/etcd.conf# set GOMAXPROCS to number of processorsExecStart=/usr/bin/etcd \ --name ${ETCD_NAME} \ --cert-file=/etc/etcd/etcdSSL/etcd.pem \ --key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --peer-cert-file=/etc/etcd/etcdSSL/etcd.pem \ --peer-key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \ --peer-trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \ --initial-advertise-peer-urls ${ETCD_INITIAL_ADVERTISE_PEER_URLS} \ --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-cluster-token ${ETCD_INITIAL_CLUSTER_TOKEN} \ --initial-cluster infra1=https://172.16.5.81:2380,infra2=https://172.16.5.86:2380,infra3=https://172.16.5.87:2380 \ --initial-cluster-state new \ --data-dir=${ETCD_DATA_DIR}Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target
etcd的配置文件(/etc/etcd/etcd.conf)
[root@server86 ~]# vim /etc/etcd/etcd.conf#[member]ETCD_NAME=infra2 ETCD_DATA_DIR="/var/lib/etcd"ETCD_LISTEN_PEER_URLS="https://172.16.5.86:2380"ETCD_LISTEN_CLIENT_URLS="https://172.16.5.86:2379"#[cluster]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.5.86:2380"ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"ETCD_ADVERTISE_CLIENT_URLS="https://172.16.5.86:2379"
etcd节点的参数配置文件
这是172.16.5.86节点的配置,如果配置其他etcd节点只要将上面的IP地址改成相应节点的IP地址即可。 还要将ETCD_NAME改一下名称。
从Server81服务器拷贝etcd的TLS证书文件至Server86服务器
[root@server81 etc]# cd etcd/[root@server81 etcd]# lsetcd.conf etcdSSL [root@server81 etcd]# [root@server81 etcd]# pwd/etc/etcd [root@server81 etcd]# [root@server81 etcd]# scp -r etcdSSL root@server86:/etc/etcdca-config.json 100% 288 82.3KB/s 00:00 ca.csr 100% 997 283.1KB/s 00:00 ca-csr.json 100% 205 60.5KB/s 00:00 ca-key.pem 100% 1675 395.4KB/s 00:00 ca.pem 100% 1350 356.7KB/s 00:00 etcd.csr 100% 1066 50.8KB/s 00:00 etcd-csr.json 100% 296 40.1KB/s 00:00 etcd-key.pem 100% 1675 356.8KB/s 00:00 etcd.pem 100% 1436 341.3KB/s 00:00 [root@server81 etcd]#
启动 etcd 服务
systemctl daemon-reload systemctl start etcd systemctl status etcd
启动server86的etcd服务
Server87安装etcd服务
yum install -y etcd
yum安装etcd
配置 etcd 的 service文件(/usr/lib/systemd/system)
[root@server87 ~]# vim /usr/lib/systemd/system/etcd.service[Unit] Description=Etcd Server After=network.target After=network-online.target Wants=network-online.target [Service] Type=notify WorkingDirectory=/var/lib/etcd/ EnvironmentFile=-/etc/etcd/etcd.conf# set GOMAXPROCS to number of processorsExecStart=/usr/bin/etcd \ --name ${ETCD_NAME} \ --cert-file=/etc/etcd/etcdSSL/etcd.pem \ --key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --peer-cert-file=/etc/etcd/etcdSSL/etcd.pem \ --peer-key-file=/etc/etcd/etcdSSL/etcd-key.pem \ --trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \ --peer-trusted-ca-file=/etc/etcd/etcdSSL/ca.pem \ --initial-advertise-peer-urls ${ETCD_INITIAL_ADVERTISE_PEER_URLS} \ --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-cluster-token ${ETCD_INITIAL_CLUSTER_TOKEN} \ --initial-cluster infra1=https://172.16.5.81:2380,infra2=https://172.16.5.86:2380,infra3=https://172.16.5.87:2380 \ --initial-cluster-state new \ --data-dir=${ETCD_DATA_DIR}Restart=on-failure LimitNOFILE=65536 [Install] WantedBy=multi-user.target
etcd的配置文件(/etc/etcd/etcd.conf)
[root@server87 ~]# vim /etc/etcd/etcd.conf#[member]ETCD_NAME=infra3 ETCD_DATA_DIR="/var/lib/etcd"ETCD_LISTEN_PEER_URLS="https://172.16.5.87:2380"ETCD_LISTEN_CLIENT_URLS="https://172.16.5.87:2379"#[cluster]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://172.16.5.87:2380"ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"ETCD_ADVERTISE_CLIENT_URLS="https://172.16.5.87:2379"
etcd节点的参数配置文件
这是172.16.5.87节点的配置,如果配置其他etcd节点只要将上面的IP地址改成相应节点的IP地址即可。 还要将ETCD_NAME改一下名称。
从Server81服务器拷贝etcd的TLS证书文件至Server87服务器
[root@server81 etcd]# scp -r etcdSSL root@server87:/etc/etcdca-config.json 100% 288 109.8KB/s 00:00 ca.csr 100% 997 417.5KB/s 00:00 ca-csr.json 100% 205 79.4KB/s 00:00 ca-key.pem 100% 1675 575.7KB/s 00:00 ca.pem 100% 1350 485.5KB/s 00:00 etcd.csr 100% 1066 289.0KB/s 00:00 etcd-csr.json 100% 296 120.7KB/s 00:00 etcd-key.pem 100% 1675 601.9KB/s 00:00 etcd.pem 100% 1436 104.4KB/s 00:00 [root@server81 etcd]#
启动 etcd 服务
systemctl daemon-reload systemctl start etcd systemctl status etcd
启动server87的etcd服务
最后回到server81服务器,检查一下etcd集群是否正常
检查刚才启动etcd失败的Server81的节点
[root@server81 etcd]# service etcd statusRedirecting to /bin/systemctl status etcd.service etcd.service - Etcd Server Loaded: loaded (/usr/lib/systemd/system/etcd.service; disabled; vendor preset: disabled) Active: active (running) since Tue 2018-08-14 16:44:46 HKT; 10min ago Main PID: 13905 (etcd) CGroup: /system.slice/etcd.service └─13905 /usr/bin/etcd --name infra1 --cert-file=/etc/etcd/etcdSSL/etcd.pem --key-file=/etc/etcd/etcdSSL/etcd-key.pem --peer-cert-file=/etc/etcd/etcdSSL/etcd.pem Aug 14 16:54:14 server81 etcd[13905]: established a TCP streaming connection with peer 9281d0058fa51de0 (stream Message writer) Aug 14 16:54:14 server81 etcd[13905]: established a TCP streaming connection with peer 9281d0058fa51de0 (stream MsgApp v2 writer) Aug 14 16:54:14 server81 etcd[13905]: health check for peer 9281d0058fa51de0 could not connect: dial tcp 172.16.5.87:2380: getsockopt: connection refused Aug 14 16:54:15 server81 etcd[13905]: updating the cluster version from 3.0 to 3.2Aug 14 16:54:15 server81 etcd[13905]: updated the cluster version from 3.0 to 3.2Aug 14 16:54:15 server81 etcd[13905]: enabled capabilities for version 3.2Aug 14 16:54:20 server81 etcd[13905]: 8da195f9b25012c9 [term: 1972] received a MsgApp message with higher term from 9281d0058fa51de0 [term: 1973] Aug 14 16:54:20 server81 etcd[13905]: 8da195f9b25012c9 became follower at term 1973Aug 14 16:54:20 server81 etcd[13905]: raft.node: 8da195f9b25012c9 changed leader from 8da195f9b25012c9 to 9281d0058fa51de0 at term 1973Aug 14 16:54:20 server81 etcd[13905]: 8da195f9b25012c9 [logterm: 1973, index: 13, vote: 0] rejected MsgVote from 9281d0058fa51de0 [logterm: 1972, index: 12] at term 1973[root@server81 etcd]#
Server81在安装了Server86/87节点后,服务已自动正常
检查etcd集群服务的健康
etcdctl \ --ca-file=/etc/etcd/etcdSSL/ca.pem \ --cert-file=/etc/etcd/etcdSSL/etcd.pem \ --key-file=/etc/etcd/etcdSSL/etcd-key.pem \ cluster-health
最后的总结
从上面的流程对于新手基本都是可以复制黏贴就可以完成的了。但是为了能够快速执行etcd集群一键部署,我在后面写好了离线etcd三台的自动化集群部署脚本,如下图所示:
在这里已经部署好etcd集群服务了,那么在此基础上,我们下一篇章就开始部署kubernetes的服务部署了。
作者:DevOps海洋的渔夫
链接:https://www.jianshu.com/p/33b5f47ababc
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