Create _index.md

2021-07-02 11:25:55 +05:30 · 2021-07-02 11:25:55 +05:30 · a229263b4f
--- a/content/en/docs/CommunityLeaders/EventHandbooks/Docker201/gettingstarted/labs/_index.md
+++ b/content/en/docs/CommunityLeaders/EventHandbooks/Docker201/gettingstarted/labs/_index.md
@ -0,0 +1,437 @@
+---
+title: "Docker Compose 101 Labs"
+linkTitle: "Docker Compose 101 Labs"
+weight: 100
+description: >-
+     Page description for Docker Compose 101 Labs
+---
+
+# Lab #1: version Command
+
+The `docker-compose version` command shows the Docker-Compose version information.
+
+
+## Pre-requisite:
+
+## Tested Infrastructure
+
+<table class="tg">
+  <tr>
+    <th class="tg-yw4l"><b>Platform</b></th>
+    <th class="tg-yw4l"><b>Number of Instance</b></th>
+    <th class="tg-yw4l"><b>Reading Time</b></th>
+    
+  </tr>
+  <tr>
+    <td class="tg-yw4l"><b> Play with Docker</b></td>
+    <td class="tg-yw4l"><b>1</b></td>
+    <td class="tg-yw4l"><b>5 min</b></td>
+    
+  </tr>
+  
+</table>
+
+## Pre-requisite
+
+- Create an account with [DockerHub](https://hub.docker.com)
+- Open [PWD](https://labs.play-with-docker.com/) Platform on your browser 
+- Click on **Add New Instance** on the left side of the screen to bring up Alpine OS instance on the right side
+
+### Checking docker-compose version 
+```
+$ docker-compose version
+docker-compose version 1.23.2, build 1110ad0
+docker-py version: 3.7.3
+CPython version: 2.7.16
+OpenSSL version: OpenSSL 1.1.1c  28 May 2019
+```
+`docker-py` is the Docker Remote API, it does everything the docker command does, but from within Python – run containers, manage them, pull/push images, etc.<br>
+
+
+# Lab #2: help Command
+The `docker-compose help` list out all the subcommands that can be used with docker-compose.Even you can try <b>--help</b> or <b>-h</b>.
+
+
+## Pre-requisite:
+
+## Tested Infrastructure
+
+<table class="tg">
+  <tr>
+    <th class="tg-yw4l"><b>Platform</b></th>
+    <th class="tg-yw4l"><b>Number of Instance</b></th>
+    <th class="tg-yw4l"><b>Reading Time</b></th>
+    
+  </tr>
+  <tr>
+    <td class="tg-yw4l"><b> Play with Docker</b></td>
+    <td class="tg-yw4l"><b>1</b></td>
+    <td class="tg-yw4l"><b>5 min</b></td>
+    
+  </tr>
+  
+</table>
+
+## Pre-requisite
+
+- Create an account with [DockerHub](https://hub.docker.com)
+- Open [PWD](https://labs.play-with-docker.com/) Platform on your browser 
+- Click on **Add New Instance** on the left side of the screen to bring up Alpine OS instance on the right side
+
+### Checking docker-compose help command 
+```
+$ docker-compose help
+
+Define and run multi-container applications with Docker.
+
+Usage:
+  docker-compose [-f <arg>...] [options] [COMMAND] [ARGS...]
+  docker-compose -h|--help
+
+Options:
+  -f, --file FILE             Specify an alternate compose file
+                              (default: docker-compose.yml)
+  -p, --project-name NAME     Specify an alternate project name
+                              (default: directory name)
+  --verbose                   Show more output
+  --log-level LEVEL           Set log level (DEBUG, INFO, WARNING, ERROR, CRITICAL)
+  --no-ansi                   Do not print ANSI control characters
+  -v, --version               Print version and exit
+  -H, --host HOST             Daemon socket to connect to
+
+  --tls                       Use TLS; implied by --tlsverify
+  --tlscacert CA_PATH         Trust certs signed only by this CA
+  --tlscert CLIENT_CERT_PATH  Path to TLS certificate file
+  --tlskey TLS_KEY_PATH       Path to TLS key file
+  --tlsverify                 Use TLS and verify the remote
+  --skip-hostname-check       Don't check the daemon's hostname against the
+                              name specified in the client certificate
+  --project-directory PATH    Specify an alternate working directory
+                              (default: the path of the Compose file)
+  --compatibility             If set, Compose will attempt to convert deploy
+                              keys in v3 files to their non-Swarm equivalent
+Commands:
+  build              Build or rebuild services
+  bundle             Generate a Docker bundle from the Compose file
+  config             Validate and view the Compose file
+  create             Create services
+  down               Stop and remove containers, networks, images, and volumes
+  events             Receive real time events from containers
+  exec               Execute a command in a running container
+  help               Get help on a command
+  images             List images
+  kill               Kill containers
+  logs               View output from containers
+  pause              Pause services
+  port               Print the public port for a port binding
+  ps                 List containers
+  pull               Pull service images
+  push               Push service images
+  restart            Restart services
+  rm                 Remove stopped containers
+  run                Run a one-off command
+  scale              Set number of containers for a service
+  start              Start services
+  stop               Stop services
+  top                Display the running processes
+  unpause            Unpause services
+  up                 Create and start containers
+  version            Show the Docker-Compose version information
+```
+
+#### Trying help commands for subcommands
+Even you can try help for docker subcommands also
+```
+$ docker-compose build --help
+Build or rebuild services.
+
+Services are built once and then tagged as `project_service`,
+e.g. `composetest_db`. If you change a service's `Dockerfile` or the
+contents of its build directory, you can run `docker-compose build` to rebuild it.
+
+Usage: build [options] [--build-arg key=val...] [SERVICE...]
+
+Options:
+    --compress              Compress the build context using gzip.
+    --force-rm              Always remove intermediate containers.
+    --no-cache              Do not use cache when building the image.
+    --pull                  Always attempt to pull a newer version of the image.
+    -m, --memory MEM        Sets memory limit for the build container.
+    --build-arg key=val     Set build-time variables for services.
+    --parallel              Build images in parallel.
+```
+
+# Lab #3: Config Command
+The `docker-compose config` command validate the docker-compose file and view the compose file.
+
+## Pre-requisite:
+
+## Tested Infrastructure
+
+<table class="tg">
+  <tr>
+    <th class="tg-yw4l"><b>Platform</b></th>
+    <th class="tg-yw4l"><b>Number of Instance</b></th>
+    <th class="tg-yw4l"><b>Reading Time</b></th>
+    
+  </tr>
+  <tr>
+    <td class="tg-yw4l"><b> Play with Docker</b></td>
+    <td class="tg-yw4l"><b>1</b></td>
+    <td class="tg-yw4l"><b>5 min</b></td>
+    
+  </tr>
+  
+</table>
+
+## Pre-requisite
+
+- Create an account with [DockerHub](https://hub.docker.com)
+- Open [PWD](https://labs.play-with-docker.com/) Platform on your browser 
+- Click on **Add New Instance** on the left side of the screen to bring up Alpine OS instance on the right side
+
+# Assignment
+- Create a docker-compose.yml file
+- Validate the docker-compose file
+- Testing docker-compose config with wrong config
+
+
+
+### Create a docker-compose.yml file
+
+Copy the below contents:
+
+```
+version: '3.1'
+services:
+  #Nginx Service
+   webserver:
+     image: nginx:alpine
+     container_name: webserver
+     restart: unless-stopped
+     ports:
+       - "80:80"
+       - "443:443"
+```
+
+Or Clone the repository:
+
+```
+git clone https://github.com/collabnix/dockerlabs
+cd intermediate/workshop/compose/lab/3/config/
+cat docker-compose.yml
+```
+
+
+### Validate the docker-compose file
+```
+$ docker-compose config
+services:
+  webserver:
+    container_name: webserver
+    image: nginx:alpine
+    ports:
+    - 80:80/tcp
+    - 443:443/tcp
+    restart: unless-stopped
+version: '3.1'
+```
+### Testing docker-compose config with wrong config
+Lets just change the instruction `services` to `service` and test.
+```
+$docker-compose config
+
+ERROR: The Compose file './docker-compose.yml' is invalid because:
+Invalid top-level property "service". Valid top-level sections for this Compose file are: services, secrets, version, networks, volumes, and extensions starting with "x-".
+
+You might be seeing this error because you're using the wrong Compose file version. Either specify a supported version (e.g "2.2" or "3.3") and place your service definitions under the `services` key, or omit the `version` key and place your service definitions at the root of the file to use version 1.
+For more on the Compose file format versions, see https://docs.docker.com/compose/compose-file/
+```
+
+# Lab #4: Build Command
+In this lab we are going to look into <b>docker-compose build</b> command.Docker build used to create a new image using the instructions in the Dockerfile. The <b>build</b> can be specified either as a string containing a path to the build context. The newly built image will be used to create the container for the service.
+
+## Command instructions
+
+#### build
+
+The format is docker-compose build [options] [SERVICE...] .
+
+Build (rebuild) the service container in the project.
+
+Once the service container is built, it will be tagged with a tagname, such as a db container in a web project, possibly web_db.
+
+You can rebuild the service at any time by running the docker-compose build in the project directory.
+
+Options include:
+
+`--force-rm` removes the temporary container during the build process.
+
+`--no-cache` does not use cache during the build image process (this will lengthen the build process).
+
+`--pull always` tries to get a mirror of the updated version by `--pull` .
+
+
+
+## Pre-requisite:
+
+## Tested Infrastructure
+
+<table class="tg">
+  <tr>
+    <th class="tg-yw4l"><b>Platform</b></th>
+    <th class="tg-yw4l"><b>Number of Instance</b></th>
+    <th class="tg-yw4l"><b>Reading Time</b></th>
+    
+  </tr>
+  <tr>
+    <td class="tg-yw4l"><b> Play with Docker</b></td>
+    <td class="tg-yw4l"><b>1</b></td>
+    <td class="tg-yw4l"><b>5 min</b></td>
+    
+  </tr>
+  
+</table>
+
+## Pre-requisite
+
+- Create an account with [DockerHub](https://hub.docker.com)
+- Open [PWD](https://labs.play-with-docker.com/) Platform on your browser 
+- Click on **Add New Instance** on the left side of the screen to bring up Alpine OS instance on the right side
+
+We are going to build an nginx image with custome page 
+
+#### Setup environment:
+```
+$ mkdir docker-compose/build
+$ cd docker-compose/build
+```
+
+#### Now lets create the Dockerfile
+```
+FROM nginx:alpine
+RUN echo "Welcome to Docker Workshop!" >/usr/share/nginx/html/index.html
+CMD ["nginx", "-g", "daemon off;"]
+```
+
+#### Create a docker-compose.yml file
+```
+version: "3.7"
+services:
+  webapp:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: webapp:v1
+```
+<b>context:</b> To specify the build context directory that is sent to the Docker daemon.<br>
+<b>dockerfile:</b> use to specify Alternate Dockerfile or path to Dockerfile.
+#### Build the image using docker-compose
+```
+$ docker-compose build
+```
+Since we specified <b>image:</b> as well as <b>build:</b>, then the Compose built the image with name <b>webapp</b> and tag <b>v1</b>.<br>
+If we didnt specify the <b>image:</b> option the image name will be <b>buid_<service_name>:latest</b>.
+
+#### Check the image have created
+```
+$ docker image ls webapp:v1
+```
+
+### Quick Notes:
+
+#### build
+
+Specifies the path to the folder where the Dockerfile is located (either an absolute path or a path relative to the docker-compose.yml file). Compose will use it to automatically build this image and then use this image.
+```
+ version: '3' services:  webapp:  build: ./dir 
+```  
+You can also use the context directive to specify the path to the folder where the Dockerfile is located.
+
+Use the dockerfile directive to specify the Dockerfile filename.
+
+Use the arg directive to specify the variables when the image is built.
+```
+ version: '3' services:  webapp:  build:  context: ./dir  dockerfile: Dockerfile-alternate  args:  buildno: 1 
+ ```
+Use cache_from specify the cache to build the image
+```
+ build:  context: .  cache_from:  - alpine: latest  - corp/web_app: 3.14 
+```
+  
+# Lab #5: pull Command
+The `docker-compose pull` command pull down the images which is specified under each service of docker-compose file from the docker hub.
+
+## Pre-requisite:
+
+## Tested Infrastructure
+
+<table class="tg">
+  <tr>
+    <th class="tg-yw4l"><b>Platform</b></th>
+    <th class="tg-yw4l"><b>Number of Instance</b></th>
+    <th class="tg-yw4l"><b>Reading Time</b></th>
+    
+  </tr>
+  <tr>
+    <td class="tg-yw4l"><b> Play with Docker</b></td>
+    <td class="tg-yw4l"><b>1</b></td>
+    <td class="tg-yw4l"><b>5 min</b></td>
+    
+  </tr>
+  
+</table>
+
+## Pre-requisite
+
+- Create an account with [DockerHub](https://hub.docker.com)
+- Open [PWD](https://labs.play-with-docker.com/) Platform on your browser 
+- Click on **Add New Instance** on the left side of the screen to bring up Alpine OS instance on the right side
+
+# Assignment
+- Create a docker-compose.yml file
+- Pull down the service images
+- Pull down image of a single service
+
+
+### Create a docker-compose.yml file
+```
+version: '3.1'
+services:
+  #Nginx Service
+   webserver:
+     image: nginx:alpine
+     container_name: webserver
+     restart: unless-stopped
+     ports:
+       - "80:80"
+       - "443:443"
+   dbserver:
+     image: mysql:5.7
+     container_name: Mysqldb
+     restart: unless-stopped
+     ports:
+       - "3306:3306"
+```
+
+### Pull down the service images
+```
+$ docker-compose pull
+Pulling webserver ... done
+Pulling dbserver  ... done
+```
+#### Checking the images in local
+```
+$ docker image ls
+REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
+mysql               5.7                 383867b75fd2        2 hours ago         373MB
+nginx               alpine              d87c83ec7a66        2 weeks ago         21.2MB
+```
+
+### Pull down image of a single service
+Before doing pull make sure you have removed the images(docker image rm <Image_name/Image_ID>) which is already pulled.
+```
+$ docker-compose pull webserver
+Pulling webserver ... done
+```
+This pulldown only the webserver service image(nginx:alpine).