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]"
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!
