Deploy an App on Docker Containers using docker-compose

Task:

The Nautilus Application development team recently finished development of one of the apps that they want to deploy on a containerized platform. The Nautilus Application development and DevOps teams met to discuss some of the basic pre-requisites and requirements to complete the deployment. The team wants to test the deployment on one of the app servers before going live and set up a complete containerized stack using a docker compose fie. Below are the details of the task:

On App Server 3 in Stratos Datacenter create a docker compose file /opt/finance/docker-compose.yml (should be named exactly).

The compose should deploy two services (web and DB), and each service should deploy a container as per details below:

For web service:

a. Container name must be php_host.

b. Use image php with any apache tag. Check here for more details https://hub.docker.com/_/php?tab=tags.

c. Map php_host container's port 80 with host port 5001

d. Map php_host container's /var/www/html volume with host volume /var/www/html.

For DB service:

a. Container name must be mysql_host.

b. Use image mariadb with any tag (preferably latest). Check here for more details https://hub.docker.com/_/mariadb?tab=tags.

c. Map mysql_host container's port 3306 with host port 3306

d. Map mysql_host container's /var/lib/mysql volume with host volume /var/lib/mysql.

e. Set MYSQL_DATABASE=database_host and use any custom user ( except root ) with some complex password for DB connections.

After running docker-compose up you can access the app with curl command curl <server-ip or hostname>:5001/

For more details check here: https://hub.docker.com/_/mariadb?tab=description

Step 1) Login to Application server 3 and switch to root user.

thor@jump_host /$ ssh banner@stapp03

banner@stapp03's password: 

[banner@stapp03 ~]$ sudo su -

Step 2) Create a docker-compose.yml file with the specifications given in the task.

[root@stapp03 ~]# cd /opt/finance/

[root@stapp03 finance]# ls -rlt

total 0

[root@stapp03 finance]# vi docker-compose.yml

  web:

     container_name: php_host

     image: php:apache

     ports:

       - 5001:80

     volumes:

       - /var/www/html:/var/www/html     

  db:

    container_name: mysql_host

    image: mariadb:latest

    ports:

    - 3306:3306

    volumes:

      - /var/lib/mysql:/var/lib/mysql

    environment:

      MYSQL_DATABASE: database_host

      MYSQL_ROOT_PASSWORD: abc#123

      MYSQL_USER: pavan

      MYSQL_PASSWORD: Wordpress#134

Step 3) Run the following command

[root@stapp03 finance]# docker-compose up

Pulling web (php:apache)...

apache: Pulling from library/php

6f28985ad184: Pull complete

db883aae18bc: Pull complete

ffae70ea03a9: Pull complete

1e8027612378: Pull complete

3ec32e53dce5: Pull complete

3bb74037bf77: Pull complete

feda0fbd85b1: Pull complete

08cbfcace66f: Pull complete

90e59842632d: Pull complete

5a29d8ab032c: Pull complete

5435aacb3255: Pull complete

57f9bba5897a: Pull complete

7c89fe480eda: Pull complete

Pulling db (mariadb:latest)...

latest: Pulling from library/mariadb

5d3b2c2d21bb: Pull complete

3fc2062ea667: Pull complete

75adf526d75b: Pull complete

62aa2722e098: Pull complete

756d25563a9f: Pull complete

2022ea4dab77: Pull complete

0ab4098b0f7c: Pull complete

d03413915fdf: Pull complete

fb8e671b1408: Pull complete

5e2452f3fb5c: Pull complete

c2da3a6fe532: Pull complete

153b7df268e7: Pull complete

Creating php_host   ... done

Creating mysql_host ... done

Attaching to mysql_host, php_host

mysql_host | 2021-03-16 01:43:25+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 1:10.5.9+maria~focal started.

mysql_host | 2021-03-16 01:43:25+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'

mysql_host | 2021-03-16 01:43:25+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 1:10.5.9+maria~focal started.

mysql_host | 2021-03-16 01:43:25+00:00 [Note] [Entrypoint]: Initializing database files

php_host | AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.3. Set the 'ServerName' directive globally to suppress this message

php_host | AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.17.0.3. Set the 'ServerName' directive globally to suppress this message

php_host | [Tue Mar 16 01:43:28.007827 2021] [mpm_prefork:notice] [pid 1] AH00163: Apache/2.4.38 (Debian) PHP/8.0.3 configured -- resuming normal operations

php_host | [Tue Mar 16 01:43:28.007869 2021] [core:notice] [pid 1] AH00094: Command line: 'apache2 -D FOREGROUND'

mysql_host | 

mysql_host | 

mysql_host | PLEASE REMEMBER TO SET A PASSWORD FOR THE MariaDB root USER !

mysql_host | To do so, start the server, then issue the following commands:

mysql_host | 

mysql_host | '/usr/bin/mysqladmin' -u root password 'new-password'

mysql_host | '/usr/bin/mysqladmin' -u root -h  password 'new-password'

mysql_host | 

mysql_host | Alternatively you can run:

mysql_host | '/usr/bin/mysql_secure_installation'

mysql_host | 

mysql_host | which will also give you the option of removing the test

mysql_host | databases and anonymous user created by default.  This is

mysql_host | strongly recommended for production servers.

mysql_host | 

mysql_host | See the MariaDB Knowledgebase at https://mariadb.com/kb or the

mysql_host | MySQL manual for more instructions.

mysql_host | 

mysql_host | Please report any problems at https://mariadb.org/jira

mysql_host | 

mysql_host | The latest information about MariaDB is available at https://mariadb.org/.

mysql_host | You can find additional information about the MySQL part at:

mysql_host | https://dev.mysql.com

mysql_host | Consider joining MariaDB's strong and vibrant community:

mysql_host | https://mariadb.org/get-involved/

mysql_host | 

mysql_host | 2021-03-16 01:43:28+00:00 [Note] [Entrypoint]: Database files initialized

mysql_host | 2021-03-16 01:43:28+00:00 [Note] [Entrypoint]: Starting temporary server

mysql_host | 2021-03-16 01:43:28+00:00 [Note] [Entrypoint]: Waiting for server startup

mysql_host | 2021-03-16  1:43:28 0 [Note] mysqld (mysqld 10.5.9-MariaDB-1:10.5.9+maria~focal) starting as process 96 ...

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Uses event mutexes

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Compressed tables use zlib 1.2.11

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Number of pools: 1

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions

mysql_host | 2021-03-16  1:43:28 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Using Linux native AIO

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Completed initialization of buffer pool

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: 128 rollback segments are active.

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Creating shared tablespace for temporary tables

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: 10.5.9 started; log sequence number 45130; transaction id 20

mysql_host | 2021-03-16  1:43:28 0 [Note] Plugin 'FEEDBACK' is disabled.

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool

mysql_host | 2021-03-16  1:43:28 0 [Note] InnoDB: Buffer pool(s) load completed at 210316  1:43:28

mysql_host | 2021-03-16  1:43:28 0 [Warning] 'user' entry 'root@35db7c5d0517' ignored in --skip-name-resolve mode.

mysql_host | 2021-03-16  1:43:28 0 [Warning] 'proxies_priv' entry '@% root@35db7c5d0517' ignored in --skip-name-resolve mode.

mysql_host | 2021-03-16  1:43:28 0 [Note] Reading of all Master_info entries succeeded

mysql_host | 2021-03-16  1:43:28 0 [Note] Added new Master_info '' to hash table

mysql_host | 2021-03-16  1:43:28 0 [Note] mysqld: ready for connections.

mysql_host | Version: '10.5.9-MariaDB-1:10.5.9+maria~focal'  socket: '/run/mysqld/mysqld.sock'  port: 0  mariadb.org binary distribution

mysql_host | 2021-03-16 01:43:29+00:00 [Note] [Entrypoint]: Temporary server started.

mysql_host | Warning: Unable to load '/usr/share/zoneinfo/leap-seconds.list' as time zone. Skipping it.

mysql_host | Warning: Unable to load '/usr/share/zoneinfo/leapseconds' as time zone. Skipping it.

mysql_host | Warning: Unable to load '/usr/share/zoneinfo/tzdata.zi' as time zone. Skipping it.

mysql_host | 2021-03-16  1:43:31 5 [Warning] 'proxies_priv' entry '@% root@35db7c5d0517' ignored in --skip-name-resolve mode.

mysql_host | 2021-03-16 01:43:31+00:00 [Note] [Entrypoint]: Creating database database_host

mysql_host | 2021-03-16 01:43:31+00:00 [Note] [Entrypoint]: Creating user pavan

mysql_host | 2021-03-16 01:43:31+00:00 [Note] [Entrypoint]: Giving user pavan access to schema database_host

mysql_host | 

mysql_host | 2021-03-16 01:43:31+00:00 [Note] [Entrypoint]: Stopping temporary server

mysql_host | 2021-03-16  1:43:31 0 [Note] mysqld (initiated by: root[root] @ localhost []): Normal shutdown

mysql_host | 2021-03-16  1:43:31 0 [Note] Event Scheduler: Purging the queue. 0 events

mysql_host | 2021-03-16  1:43:31 0 [Note] InnoDB: FTS optimize thread exiting.

mysql_host | 2021-03-16  1:43:31 0 [Note] InnoDB: Starting shutdown...

mysql_host | 2021-03-16  1:43:31 0 [Note] InnoDB: Dumping buffer pool(s) to /var/lib/mysql/ib_buffer_pool

mysql_host | 2021-03-16  1:43:31 0 [Note] InnoDB: Buffer pool(s) dump completed at 210316  1:43:31

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1"

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Shutdown completed; log sequence number 45142; transaction id 21

mysql_host | 2021-03-16  1:43:32 0 [Note] mysqld: Shutdown complete

mysql_host | 

mysql_host | 2021-03-16 01:43:32+00:00 [Note] [Entrypoint]: Temporary server stopped

mysql_host | 

mysql_host | 2021-03-16 01:43:32+00:00 [Note] [Entrypoint]: MySQL init process done. Ready for start up.

mysql_host | 

mysql_host | 2021-03-16  1:43:32 0 [Note] mysqld (mysqld 10.5.9-MariaDB-1:10.5.9+maria~focal) starting as process 1 ...

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Uses event mutexes

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Compressed tables use zlib 1.2.11

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Number of pools: 1

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Using crc32 + pclmulqdq instructions

mysql_host | 2021-03-16  1:43:32 0 [Note] mysqld: O_TMPFILE is not supported on /tmp (disabling future attempts)

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Using Linux native AIO

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Initializing buffer pool, total size = 134217728, chunk size = 134217728

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Completed initialization of buffer pool

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: 128 rollback segments are active.

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Creating shared tablespace for temporary tables

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: 10.5.9 started; log sequence number 45142; transaction id 20

mysql_host | 2021-03-16  1:43:32 0 [Note] Plugin 'FEEDBACK' is disabled.

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool

mysql_host | 2021-03-16  1:43:32 0 [Note] InnoDB: Buffer pool(s) load completed at 210316  1:43:32

mysql_host | 2021-03-16  1:43:33 0 [Note] Server socket created on IP: '::'.

mysql_host | 2021-03-16  1:43:33 0 [Warning] 'proxies_priv' entry '@% root@35db7c5d0517' ignored in --skip-name-resolve mode.

mysql_host | 2021-03-16  1:43:33 0 [Note] Reading of all Master_info entries succeeded

mysql_host | 2021-03-16  1:43:33 0 [Note] Added new Master_info '' to hash table

mysql_host | 2021-03-16  1:43:33 0 [Note] mysqld: ready for connections.

mysql_host | Version: '10.5.9-MariaDB-1:10.5.9+maria~focal'  socket: '/run/mysqld/mysqld.sock'  port: 3306  mariadb.org binary distribution

php_host | 172.16.238.3 - - [16/Mar/2021:01:49:57 +0000] "GET / HTTP/1.1" 200 358 "-" "curl/7.29.0"