IBB brain shutdown procedure
This document describes procedure to shutdown an IBB brain instance.
On RHV admin portal, shutdown all virtual machines but not the
Put the cluster in global maintenance mode by login any brain server, and
hosted-engine --set-maintenance --mode=global.
To verify, login in a brain node and
SPA: a cofiguration Dashboard
If you are like me who dislikes any GUI and mouse clicks, CLI via a SSH session to IMM is a fun way to get things done. This one shows how to config disks into RAID.
CLI manual is here.
usage: storage -config vol -option [-options] -target target_id options: -remove ...
Introduce tools to create screencast.
Use RHEL server qcow2 as sandbox
The closest thing RHEL has to a cloud image is a qcow (download from here). This image has disabled root password, and disabled SSH access ← so what the heck!?
Method 1: modify image directly
Really ugly solution. Anyway. On a Ubuntu 16.04, install
create root ...
These notes are based on Satellite 6.3. There are minor difference between 6.2 and 6.3. Grasp the concept here, and hopefully you will have a good understanding of the Satellite models and procedures.
- One satellite server (master server), and 1+ capsule servers.
- The Satellite Server is ...
Juju GUI nginx proxy
In LXD on localhost we introduced using
LXD container to bootstrap a Juju controller.
But how to access the Juju GUI? Launching it is easy
$ juju gui from juju host;
accessing it from anywhere outside
the host is a challenge. One way is through
$ ssh -X to
KVM is something new to me, and it sounds awesome. The experience I want to have is a local dev that I can copy & paste from some base image in case I forgot to take a snapshot at milestone. This way I feel comfortable to stand up a sandbox, try ...
Juju local LXD
Using Juju's LXD provider is the least-hassle way to start an experience of Juju and its charms. However, if you have done charm development for a while, you know making a one line of code change, deploying charm, then wait to see the new code got executed ← it's ...
Charm Ansible integration
Let's face it. Ansible has the mouth (and market) share these days. For our modeling purpose, we are to utilize its procedural strength to carry out actions, which provides an abstraction instead of coding in charm's Python files.
- Design as reusable layer(s)
- Be compatible with ...
Have you ever wondered what layer-basic is for? and why every charm needs to include it? In this article we will take a look at its code base to decipher this mystery.
We already know hooks are hardcoded. Juju expects certain hooks and hook sequence is always executed in ...
Juju charm Python2
Why do we want to build Python2 charms? Charms are claimed to built for Python3. However, the catch is that charms are also built for Ubuntu ecosystems ONLY if you care to examine its code base.
charmhelpers/charmhelpers for example:
try: import six # flake8: noqa except ...
In this article we will study charm's reactive framework to get a firm understanding of what they mean by writing an reactive charm.
Hooks give one a dedicated sequence that execution is guaranteed in that order and developer can ...
Charm chained states
This charm is created to demonstrate chained states using Juju charm. Chained states is essentially mirroring a pattern of any sequential execution in a workflow. Potentially each execution block can also have conditions to set the next state, even though this type of knowledge should be exposed outside function element ...
MAAS vs. Ironic
This article is to analyze Openstack Ironic and Canonical MAAS, both are tools to turn baremetal into a pool of managed resources that are ready for consumption by upstream srervice. On the highest level, a baremetal is either managed or not-managed. Being managed requires that the manager is aware of ...
Everyone of us has installed an operating system to a computer at some point in life. It is easy to perceive inserting a disk or USB key to make this happen because the OS files are there. A fancier version is to boot from network using PXE boot option, which ...
This article is an outcome of my writing a Juju-Ironic provider. The plan was to first figure out Ironic APIs that will achieve what Juju provider needs — start an instance on demand, then build those REST requests into Juju provider code. After playing with Ironic API and Openstack's Devstack ...