Ahmed Bessifi abessifi

Simulate Bare-Metal IPMI for VMs in RHEL8 Libvirt

Install the Virtual BMC package in the machine to use as the vBMC server. Note1: When using OpenStack repos the python3-virtualbmc RPM might be available. These instrucctions do not use that package.
```
pip3 install virtualbmc
```
- The vBMC server can be running in any machine. When using a remote libvirt server it is recommended to have passwordless authentication from the vBMC server to the libvirt machines.
- For this document the vBMC Server export vBMCServerIP=192.168.1.13

Portability with knative

Three functions from the OpenFaaS store have been packaged as "knative serving" definitions. No change to the container or code is needed.

Inception - identify the content of images with machine-learning - is it a bird, a plane or what?
Colorise - turn any black and white image into colour
NodeInfo - give system info, pass "verbose" as the body for network adapters etc.

Find the original here article here: Devops Best Practices

DevOps started out as "Agile Systems Administration". In 2008, at the Agile Conference in Toronto, Andrew Shafer posted an offer to moderate an ad hoc "Birds of a Feather" meeting to discuss the topic of "Agile Infrastructure". Only one person showed up to discuss the topic: Patrick Debois. Their discussions and sharing of ideas with others advanced the concept of "agile systems administration". Debois and Shafer formed an Agile Systems Administrator group on Google, with limited success. Patrick Debois did a presentation called "Infrastructure and Operations" addressing

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

Use curl to get the JSON response for the latest release
Use grep to find the line containing file URL
Use cut and tr to extract the URL
Use wget to download it

curl -s https://api.github.com/repos/jgm/pandoc/releases/latest \
| grep "browser_download_url.*deb" \
| cut -d : -f 2,3 \
| tr -d \" \

	knowledge dump on container runtimes

	KataContainers
	- image coupled with kernel
	- light vm layer
	- can run in nested virturalization environments if hardware supports and you can enable it in bios (ex. only bare metal EC2 instances, limits many cloud providers)
	- slower startup time
	- OCI compliant
	- previously known as ClearContainers by Intel

	yum install wget
	wget https://yum.dockerproject.org/repo/main/centos/7/Packages/docker-engine-1.13.1-1.el7.centos.x86_64.rpm
	wget https://yum.dockerproject.org/repo/main/centos/7/Packages/docker-engine-selinux-1.13.1-1.el7.centos.noarch.rpm

	#nice site with pckgs: https://pkgs.org/

	#package for docker-engine-selinux
	yum install -y policycoreutils-python
	rpm -i docker-engine-selinux-1.13.1-1.el7.centos.noarch.rpm