cooking Docker Nginx with Chef Server

from pexels.com

In the last couple of weeks, I started to study Chef; install Docker with Chef was one of my first steps into the wide world of server automation.

From your chef-server you must download your chef-repo.

Go inside the chef-repo folder and generate a cookbook named mydocker:

generate cookbook cookbooks/mydocker

edit the file metadata.rb in cookbooks/mydocker/ and add this:

depends 'docker', '~> 2.0'

in cookbooks/mydocker/recipes edit the file default.rb and add this:

docker_service 'default' do
action [:create, :start]
end


# Pull latest image
docker_image 'nginx' do
tag 'latest'
action :pull
end


# Run container exposing ports
docker_container 'my_nginx' do
repo 'nginx'
tag 'latest'
port '80:80'
volumes "/home/docker/default.conf:/etc/nginx/conf.d/default.conf:ro"
volumes "/home/docker/html:/usr/share/nginx/html"
end

# create file default.conf for volumes doccker
template "/home/docker/default.conf" do
source "default.conf.erb"
#notifies :reload, "service[default]"
end

# create file index.html for volumes docker
template '/home/docker/html/index.html' do
source 'index.html.erb'
variables(
:ambiente => node.chef_environment
)
action :create
#notifies :restart, 'service[httpd]', :immediately
end

Now we must create two template named index.html.erb and default.conf.erb

chef generate template index.html
chef generate template default.conf

edit index.html.erb in /cookbooks/mydocker/templates

<html>
<body>
<h1>Hello, World!</h1>
<h3>HOSTNAME: <%= node['hostname'] %></h3>
<h3>IPADDRESS: <%= node['ipaddress'] %></h3>
<p><hr></p>
<h3>ENVIRONMENT: <%= @ambiente %></h3>
</body>
</html>

edit default.conf in /cookbooks/mydocker/templates:

server {
listen 80;
server_name localhost;
    #ssl
# ssl on;
#ssl_certificate /etc/nginx/ssl/nginx.crt;
#ssl_certificate_key /etc/nginx/ssl/nginx.key;
    #charset koi8-r;
#access_log /var/log/nginx/log/host.access.log main;
    location / {
root /usr/share/nginx/html;
index index.html index.htm;
}
    #error_page  404              /404.html;
    # redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/share/nginx/html;
}
    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
    # deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}

link the cookbook to the node (your machine…)

knife node run_list add docker1 "recipe[mydocker]"

(for know how connect chef to your server take a look here)

Now from inside the mydocker (/cookbooks/mydocker) folder we can upload the new cookbook on the chef-server:

berks install
berks upload

Now, you can go on your server, and launch chef-client for update your machine with the new configuration.

sudo chef-client

Good Luck!

P.S: Here the complete code: https://github.com/pierangelo1982/my-chef-docker-cookbook