1. [etcd]
    3.     ：https://github.com/etcd-io/etcd/releases
    1. [Centos7 直接安装]
    3.     ：yum -y install etcd
    5. [配置 /etc/etcd/etcd.conf]
    7. [root@localhost opt]# vim /etc/etcd/etcd.conf
    9. #[Member]
    10. #ETCD_CORS=""
    11. ETCD_DATA_DIR="/var/lib/etcd/default.etcd"       # 定义数据存放位置
    12. #ETCD_WAL_DIR=""
    13. #ETCD_LISTEN_PEER_URLS="http://localhost:2380"   # 监听etcd实例的地址
    14. ETCD_LISTEN_CLIENT_URLS="http://localhost:2379"  # 监听客户端地址
    15. #ETCD_MAX_SNAPSHOTS="5"
    16. #ETCD_MAX_WALS="5"
    17. ETCD_NAME="default"
    18. #ETCD_SNAPSHOT_COUNT="100000"
    19. #ETCD_HEARTBEAT_INTERVAL="100"
    20. #ETCD_ELECTION_TIMEOUT="1000"
    21. #ETCD_QUOTA_BACKEND_BYTES="0"
    22. #ETCD_MAX_REQUEST_BYTES="1572864"
    23. #ETCD_GRPC_KEEPALIVE_MIN_TIME="5s"
    24. #ETCD_GRPC_KEEPALIVE_INTERVAL="2h0m0s"
    25. #ETCD_GRPC_KEEPALIVE_TIMEOUT="20s"
    26. #
    27. #[Clustering]
    28. #ETCD_INITIAL_ADVERTISE_PEER_URLS="http://localhost:2380" #通知其他etcd实例地址
    29. ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379"        # 通知客户端地址
    30. #ETCD_DISCOVERY=""
    31. #ETCD_DISCOVERY_FALLBACK="proxy"
    32. #ETCD_DISCOVERY_PROXY=""
    33. #ETCD_DISCOVERY_SRV=""
    34. #ETCD_INITIAL_CLUSTER="default=http://localhost:2380" #定义etcd集群节点
    35. #ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" # 初始化集群token，token一致则可以进入同一集群
    36. #ETCD_INITIAL_CLUSTER_STATE="new"          # 初始化集群状态，new表示新建
    37. #ETCD_STRICT_RECONFIG_CHECK="true"
    38. #ETCD_ENABLE_V2="true"
    39. #
    40. #[Proxy]
    41. #ETCD_PROXY="off"
    42. #ETCD_PROXY_FAILURE_WAIT="5000"
    43. #ETCD_PROXY_REFRESH_INTERVAL="30000"
    44. #ETCD_PROXY_DIAL_TIMEOUT="1000"
    45. #ETCD_PROXY_WRITE_TIMEOUT="5000"
    46. #ETCD_PROXY_READ_TIMEOUT="0"
    47. #
    48. #[Security]
    49. #ETCD_CERT_FILE=""
    50. #ETCD_KEY_FILE=""
    51. #ETCD_CLIENT_CERT_AUTH="false"
    52. #ETCD_TRUSTED_CA_FILE=""
    53. #ETCD_AUTO_TLS="false"
    54. #ETCD_PEER_CERT_FILE=""
    55. #ETCD_PEER_KEY_FILE=""
    56. #ETCD_PEER_CLIENT_CERT_AUTH="false"
    57. #ETCD_PEER_TRUSTED_CA_FILE=""
    58. #ETCD_PEER_AUTO_TLS="false"
    59. #
    60. #[Logging]
    61. #ETCD_DEBUG="false"
    62. #ETCD_LOG_PACKAGE_LEVELS=""
    63. #ETCD_LOG_OUTPUT="default"
    64. #
    65. #[Unsafe]
    66. #ETCD_FORCE_NEW_CLUSTER="false"
    67. #
    68. #[Version]
    69. #ETCD_VERSION="false"
    70. #ETCD_AUTO_COMPACTION_RETENTION="0"
    71. #
    72. #[Profiling]
    73. #ETCD_ENABLE_PPROF="false"
    74. #ETCD_METRICS="basic"
    75. #
    76. #[Auth]
    77. #ETCD_AUTH_TOKEN="simple"
    79. //
    81. ETCD_NAME=etcd-node1    #定义节点名称
    82. ETCD_DATA_DIR="/var/lib/etcd/default.etcd"    #定义数据存放位置
    83. #[cluster]
    84. ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.0.0.101:2380  #通知其他etcd实例地址  
    85. ETCD_INITIAL_CLUSTER="etcd-node1=http://10.0.0.101:2380,etcd-node2=http://10.0.0.2:2380,etcd-node3=http://10.0.0.3:2380"    #定义etcd集群节点
    86. ETCD_INITIAL_CLUSTER_STATE=new                            # 初始化集群状态，new表示新建
    87. ETCD_INITIAL_CLUSTER_TOKEN=etcd-k8s-cluster               # 初始化集群token，token一致则可以进入同一集群
    88. ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380                 # 监听etcd实例的地址
    89. ETCD_ADVERTISE_CLIENT_URLS=http://10.0.0.101:2379         # 通知客户端地址
    90. ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"             # 监听客户端地址
    91. #[proxy]
    92. ETCD_PROXY="off"
    93. #[security]
    1. [启动]
    3. # systemctl daemon-reload
    4. # systemctl enable etcd.service
    5. # systemctl start etcd.service  # 启动数据库
    7. [检测]
    9. # etcdctl cluster-health # 查询etcd集群健康状态
    11. # etcdctl member list # 查询etcd集群成员

    etcd数据库安装时要安装为奇数节点（与zookeeper类似），最少为3台，否则选举Leader会失败，启动其他节点时直接修改以上配置文件的本地ip为当前服务器ip即可

    3.   [解压安装，创建软链接]
    5.     ：unzip etcd-v3.3.13-darwin-amd64.zip
    7.     ：ln -sf /opt/etcd-v3.3.13-darwin-amd64/etcd /usr/bin/etcd
    9.   ：ln -sf /opt/etcd-v3.3.13-darwin-amd64/etcdctl /usr/bin/etcdctl
    11.   [配置]
    13.   ：mkdir /var/lib/etcd
    15.   ：/usr/lib/systemd/system/etcd.service # 创建配置文件etcd.service
    17. [Unit]
    18. Description=Etcd Server
    20. [Service]
    21. Type=notify
    22. TimeoutStartSec=0
    23. Restart=always
    24. WorkingDirectory=/var/lib/etcd/
    25. EnvironmentFile=-/etc/etcd/etcd.conf
    26. ExecStart=/usr/bin/etcd 
    28. [Install]
    29. WantedBy=multi-user.target
    31. # WorkingDirectory为etcd数据库目录，需要在etcd安装前创建
    33.     : /etc/etcd/etcd.conf # 创建配置文件etcd.conf
    35. ETCD_NAME=ETCD Server
    36. ETCD_DATA_DIR="/var/lib/etcd/"
    37. ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
    38. ETCD_ADVERTISE_CLIENT_URLS="http://10.0.209.151:2379"