• etcd 集群

    etcd 集群

    下面我们使用 Docker Compose 模拟启动一个 3 节点的 etcd 集群。

    编辑 docker-compose.yml 文件

    1. version: "3.6"
    2. services:
    3. node1:
    4. image: quay.io/coreos/etcd
    5. volumes:
    6. - node1-data:/etcd-data
    7. expose:
    8. - 2379
    9. - 2380
    10. networks:
    11. cluster_net:
    12. ipv4_address: 172.16.238.100
    13. environment:
    14. - ETCDCTL_API=3
    15. command:
    16. - /usr/local/bin/etcd
    17. - --data-dir=/etcd-data
    18. - --name
    19. - node1
    20. - --initial-advertise-peer-urls
    21. - http://172.16.238.100:2380
    22. - --listen-peer-urls
    23. - http://0.0.0.0:2380
    24. - --advertise-client-urls
    25. - http://172.16.238.100:2379
    26. - --listen-client-urls
    27. - http://0.0.0.0:2379
    28. - --initial-cluster
    29. - node1=http://172.16.238.100:2380,node2=http://172.16.238.101:2380,node3=http://172.16.238.102:2380
    30. - --initial-cluster-state
    31. - new
    32. - --initial-cluster-token
    33. - docker-etcd
    34. node2:
    35. image: quay.io/coreos/etcd
    36. volumes:
    37. - node2-data:/etcd-data
    38. networks:
    39. cluster_net:
    40. ipv4_address: 172.16.238.101
    41. environment:
    42. - ETCDCTL_API=3
    43. expose:
    44. - 2379
    45. - 2380
    46. command:
    47. - /usr/local/bin/etcd
    48. - --data-dir=/etcd-data
    49. - --name
    50. - node2
    51. - --initial-advertise-peer-urls
    52. - http://172.16.238.101:2380
    53. - --listen-peer-urls
    54. - http://0.0.0.0:2380
    55. - --advertise-client-urls
    56. - http://172.16.238.101:2379
    57. - --listen-client-urls
    58. - http://0.0.0.0:2379
    59. - --initial-cluster
    60. - node1=http://172.16.238.100:2380,node2=http://172.16.238.101:2380,node3=http://172.16.238.102:2380
    61. - --initial-cluster-state
    62. - new
    63. - --initial-cluster-token
    64. - docker-etcd
    65. node3:
    66. image: quay.io/coreos/etcd
    67. volumes:
    68. - node3-data:/etcd-data
    69. networks:
    70. cluster_net:
    71. ipv4_address: 172.16.238.102
    72. environment:
    73. - ETCDCTL_API=3
    74. expose:
    75. - 2379
    76. - 2380
    77. command:
    78. - /usr/local/bin/etcd
    79. - --data-dir=/etcd-data
    80. - --name
    81. - node3
    82. - --initial-advertise-peer-urls
    83. - http://172.16.238.102:2380
    84. - --listen-peer-urls
    85. - http://0.0.0.0:2380
    86. - --advertise-client-urls
    87. - http://172.16.238.102:2379
    88. - --listen-client-urls
    89. - http://0.0.0.0:2379
    90. - --initial-cluster
    91. - node1=http://172.16.238.100:2380,node2=http://172.16.238.101:2380,node3=http://172.16.238.102:2380
    92. - --initial-cluster-state
    93. - new
    94. - --initial-cluster-token
    95. - docker-etcd
    96. volumes:
    97. node1-data:
    98. node2-data:
    99. node3-data:
    100. networks:
    101. cluster_net:
    102. driver: bridge
    103. ipam:
    104. driver: default
    105. config:
    106. -
    107. subnet: 172.16.238.0/24

    使用 docker-compose up 启动集群之后使用 docker exec 命令登录到任一节点测试 etcd 集群。

    1. / # etcdctl member list
    2. daf3fd52e3583ff, started, node3, http://172.16.238.102:2380, http://172.16.238.102:2379
    3. 422a74f03b622fef, started, node1, http://172.16.238.100:2380, http://172.16.238.100:2379
    4. ed635d2a2dbef43d, started, node2, http://172.16.238.101:2380, http://172.16.238.101:2379