Changes between Version 4 and Version 5 of dockerdeployment2023

Timestamp:

Nov 28, 2023, 5:14:19 AM (12 months ago)

Author:

deepthi

Comment:

--

dockerdeployment2023

@@ -157 +157 @@
 
     FROM: Specifies the base image to start from. It's usually an OS or another application.
-        Example: FROM ubuntu:20.04
+        Example: `FROM ubuntu:20.04`
 
     LABEL: Adds metadata to the image, like maintainer information.
-        Example: LABEL maintainer="name@example.com"
+        Example: `LABEL maintainer="name@example.com"`
 
     RUN: Executes commands in a new layer on top of the current image and commits the result.
-        Example: RUN apt-get update && apt-get install -y nginx
+        Example: `RUN apt-get update && apt-get install -y nginx`
 
     CMD: Provides defaults for the executing container. There can only be one CMD instruction in a Dockerfile.
-        Example: CMD ["nginx", "-g", "daemon off;"]
+        Example:` CMD ["nginx", "-g", "daemon off;"]`
 
     ENTRYPOINT: Configures the container to run as an executable. It's often used in combination with CMD.
-        Example: ENTRYPOINT ["nginx"]
+        Example: `ENTRYPOINT ["nginx"]`
 
     COPY: Copies files or directories from the host machine to the container.
-        Example: COPY ./webapp /var/www/webapp
+        Example: `COPY ./webapp /var/www/webapp`
 
     ADD: Similar to COPY, but can also handle URLs and tarball extraction.
-        Example: ADD https://example.com/app.tar.gz /app/
-
-    WORKDIR: Sets the working directory for any subsequent RUN, CMD, ENTRYPOINT, COPY, and ADD instructions.
-        Example: WORKDIR /app
+        Example: `ADD https://example.com/app.tar.gz /app/`
+
+    WORKDIR: Sets the working directory for any subsequent `RUN`, `CMD`, `ENTRYPOINT`,` COPY`, and `ADD` instructions.
+        Example: `WORKDIR /app`
 
     EXPOSE: Informs Docker that the container listens on the specified network port at runtime.
-        Example: EXPOSE 80
+        Example: `EXPOSE 80`
 
     ENV: Sets environment variables.
-        Example: ENV MY_VARIABLE=value
+        Example: `ENV MY_VARIABLE=value`
 
     VOLUME: Creates a mount point for external storage or other containers.
-        Example: VOLUME /data
+        Example: `VOLUME /data`
  
 Let's create a Dockerfile for a basic web server using Nginx:
@@ -197 +197 @@
  
 # Use the official Nginx image as a base
-FROM nginx:latest
+`FROM nginx:latest`
 
 # Set the maintainer label
-LABEL maintainer="name@example.com"
+`LABEL maintainer="name@example.com"`
 
 # Copy static website files to the Nginx web directory
-COPY ./website /usr/share/nginx/html
+`COPY ./website /usr/share/nginx/html`
 
 # Expose port 80 for the web server
-EXPOSE 80
+`EXPOSE 80`
 
 # Default command to run Nginx in the foreground
-CMD ["nginx", "-g", "daemon off;"]
+`CMD ["nginx", "-g", "daemon off;"]`
 
 
@@ -215 +215 @@
 
 To build a Docker image from your Dockerfile, navigate to the directory containing the Dockerfile and run:
-docker build -t my-webserver:latest .
+
+`docker build -t my-webserver:latest .`
+
 This command tells Docker to build an image using the Dockerfile in the current directory (.) and tag it as my-webserver:latest.
  
@@ -239 +241 @@
 Basic docker-compose Commands
 
-•           docker-compose up: Starts up the services defined in the docker-compose.yml file.
-•           docker-compose down: Stops and removes all the containers defined in the docker-compose.yml file.
-•           docker-compose ps: Lists the services and their current state (running/stopped).
-•          docker-compose logs: Shows the logs from the services.
+•          ` docker-compose up`: Starts up the services defined in the docker-compose.yml file.
+•          ` docker-compose down`: Stops and removes all the containers defined in the docker-compose.yml file.
+•          ` docker-compose ps`: Lists the services and their current state (running/stopped).
+•          `docker-compose logs`: Shows the logs from the services.
  
 Deploying WordPress with Docker Compose
@@ -285 +287 @@
 
 docker-compose up -d
-This command will start the services in detached mode. Once the services are up, you can access the WordPress site by navigating to http://<Floating_IP>:8080 from your browser.
+This command will start the services in detached mode. Once the services are up, you can access the WordPress site by navigating to `http://<Floating_IP>:8080` from your browser.
  
 Stopping the Services: To stop the services, navigate to the same directory and run:
  
-docker-compose down
+`docker-compose down`
  
 Best Practices
 •       Explicit Service Names: Give your services explicit names to make it clear what each service does.
+
 •       Environment Variables: Use environment variables for sensitive information and configurations.
+
 •       Service Dependencies: Use the depends_on option to ensure services start in the correct order.
  
@@ -299 +303 @@
 ==== Part 4: ====
 
-Deploy any web app as per your wish and showcase its usage of it. You need to use more than one docker container eg: you can use three containers, one to run a web app and the others to run a database and other data storage respectively. You may use the docker hub to get any existing containers. What we evaluate is your ability to deploy the containers and bringing up a working web app.
+Deploy any web app as per your wish and showcase its usage of it. You need to use more than one docker container 
+
+eg: you can use three containers, one to run a web app and the others to run a database and other data storage respectively. 
+You may use the docker hub to get any existing containers. What we evaluate is your ability to deploy the containers and bringing up a working web app.