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Pierangelo
Pierangelo

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Docker Nginx with Chef Server

#docker #nginx #devops #chef

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

depends 'docker', '~> 2.0'
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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
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Now we must create two template named index.html.erb and default.conf.erb

chef generate template index.html
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chef generate template default.conf
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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>
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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; #} }
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link the cookbook to the node (your machine…)

knife node run_list add docker1 "recipe[mydocker]"
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(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
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berks upload
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Now, you can go on your server, and launch chef-client for update your machine with the new configuration.

sudo chef-client
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Good Luck!

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