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Creating a Configuration File

  1. On node 1, the node name is etcd01, the IP address is 10.208.71.111, and the configuration file is /usr/local/etcd/conf.yml. Modify the file content based on your requirements.
    1. Create a configuration file.
      vim /usr/local/etcd/conf.yml
    2. Press i to enter the insert mode and add the following content to the file:
      name: etcd01
data-dir: /usr/local/etcd/data
initial-advertise-peer-urls: http://10.208.71.111:2380
listen-peer-urls: http://10.208.71.111:2380
listen-client-urls: http://10.208.71.111:2379,http://127.0.0.1:2379
advertise-client-urls: http://10.208.71.111:2379
initial-cluster-token: etcd-cluster
initial-cluster: etcd01=http://10.208.71.111:2380,etcd02=http://10.208.107.205:2380,etcd03=http://10.208.72.182:2380
initial-cluster-state: new
    3. Press Esc, type :wq!, and press Enter to save the file and exit.
  2. On node 2, the node name is etcd02, the IP address is 10.208.107.205, and the configuration file is /usr/local/etcd/conf.yml. Modify the file content based on your requirements.
    1. Create a configuration file.
      vim /usr/local/etcd/conf.yml
    2. Press i to enter the insert mode and add the following content to the file:
      name: etcd02
data-dir: /usr/local/etcd/data
initial-advertise-peer-urls: http://10.208.107.205:2380
listen-peer-urls: http://10.208.107.205:2380
listen-client-urls: http://10.208.107.205:2379,http://127.0.0.1:2379
advertise-client-urls: http://10.208.107.205:2379
initial-cluster-token: etcd-cluster
initial-cluster: etcd01=http://10.208.71.111:2380,etcd02=http://10.208.107.205:2380,etcd03=http://10.208.72.182:2380
initial-cluster-state: new
    3. Press Esc, type :wq!, and press Enter to save the file and exit.
  3. On node 3, the node name is etcd03, the IP address is 10.208.72.182, and the configuration file is /usr/local/etcd/conf.yml. Modify the file content based on your requirements.
    1. Create a configuration file.
      vim /usr/local/etcd/conf.yml
    2. Press i to enter the insert mode and add the following content to the file:
      name: etcd03
data-dir: /usr/local/etcd/data
initial-advertise-peer-urls: http://10.208.72.182:2380
listen-peer-urls: http://10.208.72.182:2380
listen-client-urls: http://10.208.72.182:2379,http://127.0.0.1:2379
advertise-client-urls: http://10.208.72.182:2379
initial-cluster-token: etcd-cluster
initial-cluster: etcd01=http://10.208.71.111:2380,etcd02=http://10.208.107.205:2380,etcd03=http://10.208.72.182:2380
initial-cluster-state: new
    3. Press Esc, type :wq!, and press Enter to save the file and exit.

The parameters in the configuration file are described as follows:

  • name: name of the current etcd node
  • data-dir: data storage directory
  • initial-advertise-peer-urls: URLs for other nodes in the cluster to communicate with the current node
  • listen-peer-urls: URLs for the current node to monitor information sent by other nodes in the cluster
  • listen-client-urls: URLs for the current node to monitor information sent by the client
  • advertise-client-urls: URLs for the client to communicate with the current node
  • initial-cluster-token: used to differentiate clusters. Set this parameter to the same value for all nodes in the same cluster.
  • initial-cluster: information about all nodes in the current cluster. The current node communicates with other nodes based on the information.
  • initial-cluster-state: indicates whether the cluster is newly created. The value can be new or existing.