Ensure VM port security is disable in openstack to allow has multiple IP/MAC combination Create a bridge in linux Add physical interface to the bridge […]
Continue readingHow to Push All Branches to Remote Git Repo
Cloning a remote repo: Check out to desired branches: Push branches and tags to the remote repo:
Continue readingNextcloud
installation and running next cloud with ssl: Generate letsencrypt certificate Build an image to run with generated certificate Run the container Generate SSL certificate certbot […]
Continue readingCeph Cheat Sheet
Show the topology of the ceph cluster list osd daemon and classes of osds + physical layout which asked from crush map Getting low level […]
Continue readingHow Open vSwitch Works
Open vSwitch is an open-source project that allows hypervisors to virtualize the networking layer. This caters for the large number of virtual machines running on […]
Continue readingOpen vSwitch L2 agent in OpenStack
There was a question for me that how Open vSwitch component work together to get a service in OpenStack and why we need 2 bridges […]
Continue readingAnsible
It focuses on reaching a desired state component Inventories Playbooks Plays Tasks Modules Inventories It is the list of nodes/hosts, can be static or dynamic […]
Continue readingFirewall & iptables
In Linux, iptables is the kernel-level firewall feature iptables works by allowing you to create rules that can be applied to every packet that tries […]
Continue readingOctavia
Load Balance as a Service in the past LB is was part of Neutron projectbut now it is a core project it self like nova […]
Continue readingCinder
It provides persistance storage devices for VMs It has 3 sub component: cinder-volume: create volume cinder-scheduler: locate created volume cinder-api: restful api to cinder Cinder […]
Continue readingNova
It makes virtualization possiblePart of nova must be running on every node in the cluster We have 7 different nova component, here are some: 1. […]
Continue readingGlance
splited into sub services Glance-api roles:1. expose glance api to all other openstack component2. image management as background job Glance Config1. DB to use2. credential […]
Continue readingKeystone
keystone provides 4 services: Identity (Authentication) Token Policy (Authorization) Catalog (List of available service endpoints) Catalog This is nothing more than a list of the […]
Continue readingMultiple ssh p_key
Here is a simple configuration of adding multiple ssh private key to connect to the host with different private key from client: create a file […]
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