How do you start docker etcd?

To start the etcd container, you can use either the Docker command line tool or Docker Compose.

The method to start an etcd container using the Docker command line tool is as follows:

1. Firstly, make sure Docker is already installed. You can check the version of Docker by running the command “docker version”.
2. Pull the etcd image by executing the following command:
3. Retrieve the image from the quay.io registry for the CoreOS etcd container using Docker.
4. Next, execute the following command to start the etcd container:
5. Run the docker container named “etcd” in the background with specified ports, volumes, and configurations using the image “quay.io/coreos/etcd:v3.4.13”.
6. This command will create a container named etcd, mapping the host’s ports 2379 and 2380 to the corresponding ports inside the container, and mounting the container’s data directory /etcd-data to the same directory on the host.

The method to start an etcd container using Docker Compose is as follows:

1. Firstly, make sure that Docker and Docker Compose are already installed.
2. Create a file named docker-compose.yml and input the following content.
3. The configuration file specifies the use of version 3 of the etcd service using a specific image and container name. It exposes port numbers 2379 and 2380 and sets up volumes for data storage. The command includes various parameters such as naming the service, defining data directories, and setting URLs for communication.
4. Navigate to the directory containing the docker-compose.yml file in the terminal and run the following command to start the etcd container.
5. Start the Docker containers in detached mode.
6. This command will create and start an etcd container using the parameters defined in the configuration file.

Regardless of the method used, the etcd container will run in the background after startup and listen on ports 2379 and 2380 of the host, allowing access to the etcd service through these ports.