centos7 installation etcd tutorial.

Installing etcd on CentOS 7 can be done through the following steps:

1. Update the system:
   Run the following command in the terminal to update the system software package to the latest version:

   sudo yum update

2. Add the repository for the etcd package:
   Add the repository for the etcd package with the following command:

   sudo yum install -y epel-release

3. Install etcd:
   Run the following command in the terminal to install the etcd package:

   sudo yum install -y etcd

4. Configure etcd:

   • Edit etcd configuration file  /etc/etcd/etcd.conf, set etcd listening address and cluster configuration. For example, you can modify the following parameters:

     ETCD_LISTEN_PEER_URLS="http://your-server-ip:2380"
     ETCD_LISTEN_CLIENT_URLS="http://your-server-ip:2379"
     ETCD_INITIAL_ADVERTISE_PEER_URLS="http://your-server-ip:2380"
     ETCD_ADVERTISE_CLIENT_URLS="http://your-server-ip:2379"
     ETCD_INITIAL_CLUSTER_STATE="new"
     ETCD_INITIAL_CLUSTER_TOKEN="your-cluster-token"
     ETCD_INITIAL_CLUSTER="your-server-name=http://your-server-ip:2380"

     Replace  your-server-ip the IP address of your server your-server-name with the name of your server.

   • Save and close the configuration file.

5. Start etcd:
   Run the following command in the terminal to start the etcd service:

   sudo systemctl start etcd

6. Set etcd to start automatically at boot:
   Run the following command to set the etcd service to start automatically when the system starts:

   sudo systemctl enable etcd

So far, etcd has been successfully installed and configured on CentOS 7. You can further customize etcd's configuration according to your needs. Note that the above steps provide a basic etcd installation tutorial, the actual installation process may vary by version and environment. It is recommended to consult the etcd official documentation and other reliable sources for more detailed and specific guidance for your environment. Before making any configuration changes, make sure to back up your data and understand the relevant security and permission settings.