[转] etcd 搭建与使用
Posted 天空之城
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了[转] etcd 搭建与使用相关的知识，希望对你有一定的参考价值。
[From] https://blog.csdn.net/ShouTouDeXingFu/article/details/81167302
etcd
1、下载etcd二进制文件包
https://github.com/coreos/etcd/releases/download/v3.1.3/etcd-v3.1.3-linux-amd64.tar.gz
2、解压缩etcd-v3.1.3-linux-amd64.tar.gz，将其中的etcd和etcdctl两个可执行文件复制到各节点的/usr/bin目录
3、在各节点创建etcd的数据目录
mkdir -p /data/etcd
mkdir /etc/etcd
4、在每个节点上创建etcd的systemd unit文件/usr/lib/systemd/system/etcd.service 和 /etc/etcd/etcd.conf
etcd.service
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
Documentation=https://github.com/coreos
[Service]
Type=notify
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd
--name ${ETCD_NAME}
--cert-file=${ETCD_CERT_FILE}
--key-file=${ETCD_KEY_FILE}
--peer-cert-file=${ETCD_PEER_CERT_FILE}
--peer-key-file=${ETCD_PEER_KEY_FILE}
--trusted-ca-file=${ETCD_TRUSTED_CA_FILE}
--peer-trusted-ca-file=${ETCD_PEER_TRUSTED_CA_FILE}
--initial-advertise-peer-urls ${ETCD_INITIAL_ADVERTISE_PEER_URLS}
--listen-peer-urls ${ETCD_LISTEN_PEER_URLS}
--listen-client-urls ${ETCD_LISTEN_CLIENT_URLS}
--advertise-client-urls ${ETCD_ADVERTISE_CLIENT_URLS}
--initial-cluster-token ${ETCD_INITIAL_CLUSTER_TOKEN}
--initial-cluster ${ETCD_INITIAL_CLUSTER}
--initial-cluster-state ${ETCD_INITIAL_CLUSTER_STATE}
--data-dir=${ETCD_DATA_DIR}
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
etcd.conf etcd集群中配置文件标红的配置不一样，拷贝出来修改即可
ETCD_NAME="etcd1" #20180108 by lys #ETCD_CERT_FILE="/etc/k8s/kubernetes.pem" #ETCD_KEY_FILE="/etc/k8s/kubernetes-key.pem" #ETCD_PEER_CERT_FILE="/etc/k8s/kubernetes.pem" #ETCD_PEER_KEY_FILE="/etc/k8s/kubernetes-key.pem" #ETCD_TRUSTED_CA_FILE="/etc/k8s/ca.pem" #ETCD_PEER_TRUSTED_CA_FILE="/etc/k8s/ca.pem" ETCD_INITIAL_ADVERTISE_PEER_URLS="http://etcd1.server.biz:2380" ETCD_LISTEN_PEER_URLS="http://etcd1.server.biz:2380" ETCD_LISTEN_CLIENT_URLS="http://etcd1.server.biz:2379,http://127.0.0.1:2379" ETCD_ADVERTISE_CLIENT_URLS="http://etcd1.server.biz:2379" ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-0" ETCD_INITIAL_CLUSTER="etcd1=http://etcd1.server.biz:2380,etcd2=http://etcd2.server.biz:2380,etcd3=http://etcd3.server.biz:2380" ETCD_INITIAL_CLUSTER_STATE="new" ETCD_DATA_DIR="/data/etcd"
配置信息说明
上面在启动参数中指定了etcd的工作目录和数据目录是/data/etcd
--cert-file和--key-file分别指定etcd的公钥证书和私钥
--peer-cert-file和--peer-key-file分别指定了etcd的Peers通信的公钥证书和私钥。
--trusted-ca-file指定了客户端的CA证书
--peer-trusted-ca-file指定了Peers的CA证书
--initial-cluster-state new表示这是新初始化集群，--name指定的参数值必须在--initial-cluster中
5、启动etcd
systemctl daemon-reload
systemctl enable etcd
systemctl start etcd
systemctl status etcd
6、检查集群是否健康，在任一节点执行
export ETCDCTL_API=3
etcdctl --endpoints=http://etcd2.server.biz:2379,http://etcd1.server.biz:2379,http://etcd3.server.biz:2379 member list
etcdctl --endpoints=http://etcd2.server.biz:2379,http://etcd1.server.biz:2379,http://etcd3.server.biz:2379 endpoint status -w table
etcdctl --endpoints=http://etcd2.server.biz:2379,http://etcd1.server.biz:2379,http://etcd3.server.biz:2379 endpoint health -w table
sudo journalctl -u etcd.service -l --no-pager|less 查看日志
7、etcd集群成员扩容增加
etcdctl --endpoints=http://etcd2.server.biz:2379,http://etcd1.server.biz:2379,http://etcd3.server.biz:2379 member add etcd4 --peer-urls=http://etcd4.server.biz:2380
Member 5b316fb0b94e59f8 added to cluster f0364a493c8924dc
ETCD_NAME="etcd4"
ETCD_INITIAL_CLUSTER="etcd1=http://etcd1.server.biz:2380,etcd3=http://etcd3.server.biz:2380,etcd2=http://etcd2.server.biz:2380,etcd4=http://etcd4.server.biz:2380"
ETCD_INITIAL_CLUSTER_STATE="existing"
此时，集群会为目标节点生成一个唯一的member ID
注意:新节点加入集群是作为一个全新的节点加入，如果data-dir有数据，etcd启动时会读取己经存在的数据，启动时仍然用的老member ID,也会造成，集群不无法加入，所以一定要清空新节点的data-dir
新扩容的etcd机器的etcd.conf中配置修改为 ETCD_INITIAL_CLUSTER_STATE="existing"
删除 rm-rf /data/etcd/*
启动etcd服务即可
常见问题
1) systemd: Failed at step CHDIR spawning /usr/bin/etcd: No such file or directory
通过查看ll /usr/bin/etcd 启动文件是存在的，后来发现etcd.service里面指定了WorkingDirectory=/var/lib/etcd/ 没有创建对应目录导致，创建了/var/lib/etcd/ 目录应用启动成功
2)etcd 添加集群成员报错
Jul 23 16:58:25 bjzw_82_137 etcd: failed to process raft message (raft: stopped)
Jul 23 16:58:25 bjzw_82_137 etcd: failed to find member c79c567db2d16966 in cluster f0364a493c8924dc
Jul 23 16:58:25 bjzw_82_137 etcd: failed to find member c79c567db2d16966 in cluster f0364a493c8924dc
Jul 23 16:58:25 bjzw_82_137 etcd: failed to find member b13dd19d11c8d25d in cluster f0364a493c8924dc
Jul 23 16:58:25 bjzw_82_137 etcd: failed to find member b13dd19d11c8d25d in cluster f0364a493c8924dc
需要将etcd.conf中的配置修改为
ETCD_INITIAL_CLUSTER_STATE="existing"
---------------------
作者：起航90
来源：CSDN
原文：https://blog.csdn.net/ShouTouDeXingFu/article/details/81167302
版权声明：本文为博主原创文章，转载请附上博文链接！
以上是关于[转] etcd 搭建与使用的主要内容，如果未能解决你的问题，请参考以下文章