Running with Ruby

Tag: Jenkins

Gitlab CI Runner + RVM for projects that you want to build

Allowing Gitlab CI Runners to use RVM is really easy:

# Login as a super user (or use sudo)
su
# Switch to gitlab CI runner user
su - gitlab_ci_runner
# Go to his home directory
cd ~
# And install RVM
\curl -sSL https://get.rvm.io | bash -s stable --ruby
# Now go back to su
exit
# And restart (just in case) gitlab and ci
/etc/init.d/gitlab restart
/etc/init.d/gitlab_ci restart

That’s all. Just keep in mind, that each time you want a new Ruby version, you will have to login as gitlab_ci_runner and install it from console.

Jenkins behind Apache with HTTPS – Proxy pass with SSL

Jenkins in an awesome integration server, that can be used for free. However, having it on a non-standard www port, without a SSL, might be a problem. Accessing it from a public network might create a security threat. If you’ve got a Apache in front of your server, you can easily provide a secured proxy to Jenkins.

To do so, you need to create a VirtualHost for Apache, which will contain both: Proxy and SSL. Also it would be wise, to redirect standard HTTP requests.

VirtualHost to redirect from HTTP to HTTPS

So, first lets create our HTTP VirtualHost and let’s redirect it to HTTPS version:

<VirtualHost *:80>
  ServerName jenkins.my.domain
  ServerAlias www.jenkins.my.domain

  RewriteEngine on
  ReWriteCond %{SERVER_PORT} !^443$
  RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R,L]
</VirtualHost>

SSL keys

To get things started, we will need a key. To generate it, follow given steps (as root):

sudo su # or any other way to be a root
cd /etc/apache2/
mkdir ssl
cd ssl/
mkdir crt
mkdir key
openssl req -new -x509 -days 365 -keyout key/jenkins.key -out crt/jenkins.crt -nodes -subj  '/O=Jenkins/OU=Jenkins/CN=jenkins.my.domain'

Just remember to replace all the domain references from “jenkins.my.domain” to an appropriate one. After you execute the above commands, you should have a ssl key and ssl cert generated.

Installing Apache necessary mods

To create a SSL Proxy pass we need to install some Apache mods (still as a root):

a2enmod proxy
a2enmod proxy_http
a2enmod rewrite
a2enmod ssl

/etc/init.d/apache2 restart

HTTPS Jenkins Virtual Host

And finally, the virtual host for secured Jenkins proxy pass:

<VirtualHost *:443>
  ServerName jenkins.my.domain
  ServerAlias www.jenkins.my.domain

  SSLEngine On
  SSLCertificateFile    /etc/apache2/ssl/crt/jenkins.my.domain.crt
  SSLCertificateKeyFile /etc/apache2/ssl/key/jenkins.my.domain.key

  ProxyRequests     Off
  ProxyPass         /  http://localhost:8080/
  ProxyPassReverse  /  http://localhost:8080/
  ProxyPassReverse  /  http://my.jenkins.host/
  <Proxy http://localhost:8080/*>
    Order allow,deny
    Allow from all
  </Proxy>
  ProxyPreserveHost on
</VirtualHost>

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