OPS435 Python Lab 8
THIS LAB IS NOT READY YET!!!
PLEASE WAIT UNTIL THE LAB IS PUBLISHED. IT IS CURRENTLY UNDER CONSTRUCTION.
LAB OBJECTIVES
- Completing this course will give you the prerequisites for getting into the DevOps field. A DevOps professional is a system/network administrator with programming skills. As an introduction to that field, we will look at Fabric in this lab. Using Fabric you can automate deploying software, monitoring, and updating many systems at the same time, without using a terminal to connect to each of them separately.
REFERENCE
- These links may be helpful for extra reading:
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INVESTIGATION 1: Extra VM Setup
In order to experience Fabric's features in a realistic way, we're going to set up several virtual machines. To begin with they are all going to have the same configuration.
PART 1 - Set up your controller
In this lab you will use your existing vm centos7 as a workstation to control other VMs which we'll call workers.
Install fabric using yum. Once it's installed you should have a fab command available.
PART 2 - Create master Worker image
Create a new virtual machine, and allocate for it 1GB or RAM and 8GB of disk space. Install a Basic Web Server configuration of CentOS in that VM using the same CentOS .iso file you used for your first machine in this course.
Make sure that:
- The hostname of the system is worker1.
- It has a static IP address appropriate for your virtual network.
- You don't need to create any extra user.
- After installation ensure that you can access worker1 from your main vm using the static IP address you've assigned to it.
Set up SSH key login
In order for an automated system to be able to connect to your VM and administer it - you will need to be able to connect to it using SSH keys. You've done this in both OPS235 and OPS335.
Create a new SSH key on your main VM with your regular user. Please avoid using root. Then set things up so that your regular user on your main VM can SSH to the slave1 VM as root without putting in a password.
PART 3 - Clone the Workers
We're only simulating the real world where you'd have hundreds of VMs in one or more clouds, but you can just imagine that the VMs you're creating on your computer are actually being created on an Amazon or Microsoft server.
Make four clones of the master worker image you've just created. Then make sure that each of them has a unique IP address. That's all you're required to change manually. All the other configuration on the workers (inlcuding the hostnames) will be set by Fabric. Normally you would have some kind of automation doing all this cloning and IP address assignment as well, but we don't have time for that this semester.
Make snapshots of all your workers so that you can easily restore them to the original state after you modify them.
LAB 7 SIGN-OFF (SHOW INSTRUCTOR)
- Have Ready to Show Your Instructor: