devstack installation - Compute node

 0. sudo hostnamectl set-hostname compute-141

1. Remove any symlik of /etc/resolve.conf and add

nameserver 8.8.8.8

nameserver 8.8.4.4

2. check df -h [ /, should have good space]

3. checl internet connectivity,

ping www.google.com

4. if possible disable Ipv6, ip allocation #No mandatory

/etc/netplan/50-cloud-init.yaml 

5. And host name entry in /etc/host

give root as default user and sudo priviledge

sudo useradd -s /bin/bash -d /opt/stack -m stack

echo "stack ALL=(ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/stack

su - stack

sudo apt install git -y

git clone https://git.openstack.org/openstack-dev/devstack 

# git clone https://opendev.org/openstack-dev/devstack -b stable/ussuri

# All codes have been downloaded in /opt/stack/devstack directory

cd devstack

Edit local.conf and add your desired conf details

run --> ./stack.sh --use-feature=2020-resolver

Working compute node local.conf[change compute IP accordingly]

*****************************************************************************************

[[local|localrc]]

HOST_IP=192.168.181.12 # change this per compute node

SERVICE_HOST=192.168.181.10

LOGFILE=/opt/stack/logs/stack.sh.log

ADMIN_PASSWORD=admin

DATABASE_PASSWORD=$ADMIN_PASSWORD

MYSQL_PASSWORD=$ADMIN_PASSWORD

RABBIT_PASSWORD=$ADMIN_PASSWORD

SERVICE_PASSWORD=$ADMIN_PASSWORD

MYSQL_HOST=$SERVICE_HOST

RABBIT_HOST=$SERVICE_HOST

GLANCE_HOSTPORT=$SERVICE_HOST:9292

ENABLED_SERVICES=n-cpu,q-agt,placement-client,rabbit

## Neutron options

FIXED_RANGE=10.4.128.0/20

FLOATING_RANGE=192.168.42.128/25

PUBLIC_NETWORK_GATEWAY="192.168.180.1"

# Open vSwitch provider networking configuration

Q_USE_PROVIDERNET_FOR_PUBLIC=True

OVS_PHYSICAL_BRIDGE=br-ex

PUBLIC_INTERFACE=eno2

PUBLIC_BRIDGE=br-ex

OVS_BRIDGE_MAPPINGS=public:br-ex

*****************************************************************************************

post installation

In controller node

run 

#/opt/stack/devstack/tools/discover_hosts.sh

Found 2 cell mappings.

Skipping cell0 since it does not contain hosts.

Getting computes from cell 'cell1': 88ca0441-32c9-487a-8961-a0caaa38fe16

Checking host mapping for compute host 'compute-142': 6c0c5a81-e68d-4294-b3cc-c2cc8a37d27e

Creating host mapping for compute host 'compute-142': 6c0c5a81-e68d-4294-b3cc-c2cc8a37d27e

Found 1 unmapped computes in cell: 88ca0441-32c9-487a-8961-a0caaa38fe16

#openstack hypervisor list

the new compute should be listed as hypervisor

#Add the new compute node in AZ via dashboard and launch instances

Below were alternatives if failed , not needed

======= Installation Output using compute.conf============

Note : No c-vol service in local.conf 

=========================

DevStack Component Timing

 (times are in seconds)

=========================

run_process            4

apt-get-update         6

osc                    0

wait_for_service       2

pip_install           29

apt-get                5

-------------------------

Unaccounted time      89

=========================

Total runtime        135

This is your host IP address: 192.168.181.142

This is your host IPv6 address: ::1

Services are running under systemd unit files.

For more information see:

https://docs.openstack.org/devstack/latest/systemd.html

DevStack Version: victoria

Change: 09430e43c4d13f06f0604e8f8ba35f77a038a980 Merge "Enable access rules tempest tests" 2020-09-27 10:00:45 +0000

OS Version: Ubuntu 18.04 bionic

==== POST Installation ===

# Bridge is not created properly, its created by br-ex to eno2 mapping is not there in "ovs-vs show"

# and ifconfig still doesn't show br-ext and to eno2 mapping

TODO --> local.conf 

use 

## Open vSwitch provider networking options

PHYSICAL_NETWORK=default

OVS_PHYSICAL_BRIDGE=br-ex

PUBLIC_INTERFACE=eno2

Q_USE_PROVIDER_NETWORKING=True

Instead 

#Q_USE_PROVIDERNET_FOR_PUBLIC=True

Q_USE_PROVIDER_NETWORKING=True

PHYSICAL_NETWORK=default

OVS_PHYSICAL_BRIDGE=br-ex

PUBLIC_INTERFACE=eno2

#PUBLIC_BRIDGE=br-ex

#OVS_BRIDGE_MAPPINGS=public:br-ex

DevStack Version: victoria

Change: 680298e7c67a4250f2edf603ffb90510d5cbf496 Merge "Add possibility to not compile ovs and ovn if that's disabled" 2020-09-29 00:33:58 +0000

OS Version: Ubuntu 18.04 bionic