Hi There! I am back after a long time 😉 Was really stuck with other things.
In this post, I will explain how you can setup your Chef Server on an Ubuntu machine. Chef, as we know, is an Infrastructure Automation platform that helps manage, maintain & housekeep a number of servers by keeping them in the desired state. Sounds complicated? Ok, let me put this in an easy way 😉
Suppose you have 25 servers in your infrastructure. 10 are Apache web-servers, 5 are Database servers, 2 are monitoring servers, 2 are LDAP servers & rest are Tomcat servers. You are given the responsibility to set up all of them 😀 You will have to install packages, create users & groups & do tons of modifications like editing
/etc/resolv.conf files. All this leads to a lot of wastage in terms of time & resources. That’s where Chef or similar software helps. Chef will allow you to do all these tasks in much simpler & efficient manner. You define what packages are to be installed on what servers & Chef will do it. Add users to the
passwd file & Chef will populate this file to all the required servers. This is known as Chef recipes. Seems fun, right? 😉
Chef has 3 components.
- Workstation : – A server on which you define all your modifications like contents of passwd file, packages to be installed etc. In other words, here you create Chef recipes & cookbooks.
- Server : – Where you manage all your nodes & where all the recipes are sent to. Server then adjusts the nodes according to the recipes. It also has a web UI where you can see & manage your nodes. Chef Server can only be installed on Unix/Linux machines.
- Nodes : – The individual servers that are to be managed by Chef. Like your Apache or DB servers. Could be any OS.
Now that you know the basic terminologies, lets setup our Chef Server 🙂
Lab Description : –
- OS – Ubuntu 14.04
- RAM – 4 GB
- IP Address range – 192.168.0.XX
- Chef Server version – 12.4.0
- Chef Manage version – 2.3.0
Steps to perform : –
1. Download & Install Chef Server package. Go to https://downloads.chef.io/chef-server and download the package for your OS. In this tutorial, I have chosen Ubuntu. Install it by using below command.
root@chef-server:/home/shashank# dpkg -i chef-server-core_12.4.0-1_amd64.deb Selecting previously unselected package chef-server-core. (Reading database ... 166216 files and directories currently installed.) Preparing to unpack chef-server-core_12.4.0-1_amd64.deb ... Unpacking chef-server-core (12.4.0-1) ...
2. Configure Chef Server. Next step will be to configure it. So run the command mentioned below. It will dump an output similar to it. Please note that this step will take around 2-3 minutes or more.
root@chef-server:/home/shashank# chef-server-ctl reconfigure Starting Chef Client, version 12.6.0 resolving cookbooks for run list: ["private-chef::default"] Synchronizing Cookbooks: Deprecated features used! Cannot specify both default and name_property together on property path of resource yum_globalconfig. Only one (name_property) will be obeyed. In Chef 13, this will become an error. Please remove one or the other from the property. at 1 location: - /opt/opscode/embedded/cookbooks/cache/cookbooks/yum/resources/globalconfig.rb:76:in `class_from_file' Chef Client finished, 323/451 resources updated in 03 minutes 10 seconds Chef Server Reconfigured!
3. Create Chef user & its organisation. Issue below command to create a user & its organisation for Chef. This user will be used to log-in to its web UI & perform other admin tasks. These .pem keys will be used to authenticate & validate the certificates. Choose any desired location.
root@chef-server:/home/shashank# chef-server-ctl user-create chef-admin Chef Admin root@chef-server 'chefadmin' --filename /home/shashank/chef-admin.pem
root@chef-server:/home/shashank# chef-server-ctl org-create shashank 'Shashank Chef Server' --association_user chef-admin --filename /home/shashank/chef-validator.pem
4. Install Chef Manage(web UI). Default step is to install it using Chef itself by issuing
chef-server-ctl install chef-manage command But it threw an error on my machine that apt-get update was unable to retrieve this package. So, I downloaded the package from Chef’s site & installed it using
dpkg command. It will ask you to accept the license agreement.
root@chef-server:/home/shashank# dpkg -i Downloads/chef-manage_2.3.0-1_amd64.deb To use this software, you must agree to the terms of the software license agreement. Press any key to continue. Type 'yes' to accept the software license agreement, or anything else to cancel. yes Starting Chef Client, version 12.4.1 When its done installing it, it will prompt you to issue another command. Chef Client finished, 323/451 resources updated in 03 minutes 10 seconds Chef Server Reconfigured! Thank you for installing the Chef Management Console add-on! The next step in the process is to run: chef-manage-ctl reconfigure
5. Configure Chef Manage. Issue above command to configure it. It will take some time. Wait for it to finish.
6. Configure Chef Server again. Run
chef-server-ctl reconfigure again to configure it.
If everything goes well, you will have your Chef Server ready.
7. Login to Web console (UI). Point your browser to
https://localhost:443/login. You may also use IP address. Enter the credentials that you used in step 3 above. And lo!! You are done 🙂
Watch out for other Chef posts on my blog! Coming soon 😉