sourabhdeshmukh/Deploy Wordpress App Using Containers.md

## Deploy Wordpress App Using Containers.md

      
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              Deploy Wordpress App Using Containers.md
            
          
    Deploy Wordpress App Using Containers

Prerequisite:

Install docker on you host machine. You can follow this link.

Summary:

First we need to create an environment for working of your application for that we need web server and the application dependecies to fullfill the requirements. So in this case we are deployin wordpress application and I am using an nginx server and php dependencies.

Details:


In Docker file I will be using alpine as a base image. So why alpine image? You can read it here.


As we discussed in a summary we will be installing dependencies using apk package manager which is default in alpine image.
apk add nginx
apk add php-fpm 
apk add php-json 
apk add php-mysqli 


We will be exposing the application port to access our application.
EXPOSE 80


To make nginx server to work properly we need to create /run/nginx. In this directory our PID file will get stored. We required to create this directory because by default this directory will not be present so we need to create this directory.
mkdir /run/nginx


In the next step we are going to update the default configuration file of an nginx server to allow php. So after modification our default.conf file will look like.
#$ cat /etc/nginx/conf.d/default.conf

server {
  listen 80 default_server;
  listen [::]:80 default_server;

  root   /var/www/localhost/htdocs;
  index  index.php index.html index.htm;
  location / {
    try_files $uri $uri/ /index.php?$query_string;
  }

  location = /404.html {
    internal;
  }
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
  location ~ \.php$ {
    try_files $uri /index.php =404;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_pass   0.0.0.0:9000;
    fastcgi_index  index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
  }
}


In next step we will clone our application.
git clone https://github.com/WordPress/WordPress
cd Wordpress
mkdir config


We will copy the above default.conf nginx configuration file into config folder created in above step.


We need to define working directory as
WORKDIR /var/www/localhost/htdocs


Dockerfile So our dockerfile will look like below.
FROM alpine
EXPOSE 80
RUN apk update && \
  apk add nginx && \
  apk add php-fpm && \
  apk add php-json && \
  apk add php-mysqli && \
  mkdir /run/nginx;
ADD config/default.conf /etc/nginx/conf.d/default.conf
CMD ["/bin/sh", "-c", "/usr/sbin/php-fpm7; exec nginx -g 'daemon off;';"]
WORKDIR /var/www/localhost/htdocs


Switch to clonned directory and create docker file inside it. Because we are copying some file the dependecy files from there. And we are going to build docker image.
docker build -t wpapp .


We will run the container from same directory using below command. Here we have mounted local directory to container as a volume, else you can copy the contents from directory to a docker container with the help of Dockerfile.
docker run -it -d -v $PWD:/var/www/localhost/htdocs -p 80:80 --name wpappbox wpapp


Note: This will only host our application so to drive our application properly we need to attach it with the datastore. So it this can we will be using mysql docker container.
docker run -d -p 3306:3306 -e MYSQL_ROOT_PASSWORD=<Password> -e MYSQL_DATABASE=wpappdb --name wpappdb mysql --default-authentication-plugin=mysql_native_password


We need to point this container to our application. Go to application directory and create wp-config.php. You can copy the sample wp-config-sample.php to wp-config.php and modify the following values.

DB Name
DB User
DB Pass
DB Host (In this case our mysql docker container IP).


Now restart the docker container using docker restart .
Go to the browser window and access your application using you host ip.

Congratulations...

You have successfully deployed your wordpress application using docker containers.