Dynamically get a running container name, execute a command in the container, and restart the container.

cmd_docker_restart.sh

#!/bin/bash

# Find the correct docker-compose file
if [ -f "docker-compose.yml" ]; then
    DOCKER_COMPOSE_FILE="docker-compose.yml"
elif [ -f "docker-compose.yaml" ]; then
    DOCKER_COMPOSE_FILE="docker-compose.yaml"
else
    echo "Error: Could not find 'docker-compose.yml' or 'docker-compose.yaml'."
    exit 1
fi

echo "Using docker-compose file: $DOCKER_COMPOSE_FILE"

# Define the service name
SERVICE_NAME="app"

# Get the container name dynamically
CONTAINER_NAME=$(docker-compose -f "$DOCKER_COMPOSE_FILE" ps -q "$SERVICE_NAME")

# Check if the container name was found
if [ -z "$CONTAINER_NAME" ]; then
    echo "Error: Could not find a running container for the service '$SERVICE_NAME'."
    exit 1
fi

echo "Using container: $CONTAINER_NAME"

# Check if a command is provided
if [ "$#" -lt 1 ]; then
    echo "Usage: $0 <command>"
    echo "Example: $0 npm install express"
    exit 1
fi

# Build the command from arguments
COMMAND="$@"

# Execute the command in the container
echo "Executing command inside container: $COMMAND"
docker exec "$CONTAINER_NAME" sh -c "$COMMAND"

# Restart the container
echo "Restarting the container"
docker-compose -f "$DOCKER_COMPOSE_FILE" restart "$SERVICE_NAME"

echo "Operation completed."