Installing Node.js + Ghost in an Ubuntu 14.04 LXC Container

| linux | javascript | ubuntu |

I had to set up a blog for an interaction design course that I am taking this semester. I figured this would be the perfect opportunity to play with Node.js and work with the absolutely beautiful Ghost blogging platform. I installed all of this on my primary Linode server that hosts this blog among other things. I like to keep my server neat, so whenever I am working with a new technology that I have not used before, especially when I know it is going to install a bunch of random files and run a bunch of random scripts that I will never be able to track down, I like to put it all into an LXC Container. Aside from a few snags, the installation was pretty straightforward. I followed theinstallation guide on the Ghost github site and had to make a couple small changes due to this issue. The interesting part of this was getting the container to be accessible from the outside world. I used apache’s mod_proxy module to forward requests to the new subdomain that I created directly to Ghost which was running in my LXC container. I have seen a couple different approaches to making containers accessible to the outside world but I think that this approach works well especially if you are hosting multiple sites on the same server.

Installing Your Container

I suppose this part is optional, you can just as well run this in a regular server or VM. However, if you like to put things into tiny little boxes like me, read on! The following should be run as root. 
apt-get install lxc   

lxc-create -t download -n nodejs



  During the template selection choose ubuntu, trusty, and amd64
  
    
      
      
    
  




  Start the Container as a Daemon
  
    
      
      
    
  



lxc-start -n nodejs -d



  Open a screen session to attach the container.
  
    
      
      
    
  




  Why? Because “If it’s worth doing, it’s worth doing in screen”
  
    
      
      
    
  



screen -dRR node

lxc-attach -n nodejs

Installing Node.js and Ghost

Now that we have our shiny new container, lets get Node.js and Ghost installed. Since containers come with a very minimal set of software, we will install some additional utilities as well. The following should be run as root inside of your container. The only change I had to make from the official install guide was installing nodejs-legacy along with all the other stuff. Take a look at the issue linked to above if you are interested in more information. 
apt-get install wget unzip nodejs npm nodejs-legacy   


  Create a Directory for your Ghost blog and go into it
  
    
      
      
    
  



mkdir ghost  cd ghost



  Download and Unzip Ghost
  
    
      
      
    
  



wget https://ghost.org/zip/ghost-0.5.8.zip

unzip ghost-0.5.8.zip



  Install Ghost
  
    
      
      
    
  



npm install –production



  Since we are in a container, in order to be able to access ghost from the host
  
    
      
      
    
  




  machine we will need to edit the config.js file and change the values of 127.0.0.1 to 0.0.0.0.
  
    
      
      
    
  



vim config.js

:%s/127.0.0.0.1/0.0.0.0/g



  Start Ghost
  
    
      
      
    
  



npm start

If all went well you should now see this in the terminal. 
root@hci:/ghost# 

npm start

> ghost@0.5.8 start /ghost
> node index  Migrations: Up to date at version 003 Ghost is running in development…  Listening on 0.0.0.0:2368  Url configured as: http://localhost:2368  Ctrl+C to shut down

You can now exit the screen session by pressing Ctrl+a and then Ctrl+d to get back to the host.

Apache Proxy to Container

The last step of this is to set up the Virtual Host config file to proxy requests to our new Node.js container. 
# Grab the IP address of your container   
lxc-ls --fancy   


  Load the appropriate apache proxy modules
  
    
      
      
    
  



a2enmod proxy

a2enmod proxy_http



  Configure the Virtual Host file to set up the proxy it should look something like this. Be sure to replace the IP address listed below with the IP address of your actual container.
  
    
      
      
    
  



<VirtualHost *:80>



  Admin email, Server Name (domain name), and any aliases
  
    
      
      
    
  



ServerAdmin [email protected]

ServerName  hci.levlaz.org


ProxyVia full 

ProxyPreserveHost on


<proxy>


Order deny,allow   

Allow from all


</proxy>


ProxyPass / https://10.0.3.101:2368/

ProxyPassReverse / https://10.0.3.101:2368/


</Virtualhost>



  Restart apache to clean things up
  
    
      
      
    
  



service apache2 restart

You should now be able to access your Ghost blog by going to the domain that you set up in your virtual host config file. In order to set up Ghost for the first time, you will want to navigate to https://yoursite.com/ghost Ghost is a great product! This was a fun little project because it is a good exercise with LXC and proxying requests to containers. I hope you found this useful! If you have any questions or run into any issues please let me know in the comments below.

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