OpenStack-Installation-Configuration-Details.txt

Reference: 

1. https://www.linuxtechi.com/install-openstack-centos-8-with-packstack/ (Following which noted)

2. https://computingforgeeks.com/install-openstack-victoria-on-centos/

3. https://linuxhint.com/install_openstack_centos/

4. https://www.youtube.com/watch?v=eLCxfuDfkgo&list=PLqvYUVuTHt9yt7WdEdWyLU-y8eeQ0uSZk&index=7 (Follow PostConfig)

5. https://www.youtube.com/watch?v=NlwXe9ZNpNs (OpenStack-MultiNode)

6. https://www.youtube.com/watch?v=etvmdLQ5DtY (OpenStack-Multinode-Explain)

7. https://www.youtube.com/watch?v=in5-pwSVxwc (Following for SingleNode)

8. https://www.rdoproject.org/install/packstack/ (OpenStack Packstack installation utility )

9. https://www.linuxtechi.com/multiple-node-openstack-liberty-installation-on-centos-7-x/ (Fllowing for Multinode) 

10. https://computingforgeeks.com/deploy-openstack-cloud-on-centos-rhel-with-packstack-rdo/ (Last Fllowing it's Details)

11. https://medium.com/geekculture/how-to-create-a-personal-cloud-at-home-using-openstack-24061f991048  (Fllowing Home lab's and Customize setup)

..................................................
OpenStack Installation
..................................................

cat /etc/redhat-release

grep -E ' svm | vmx' /proc/cpuinfo

lsmod | grep kvm

lscpu

free -h

lsblk

hostnamectl set-hostname cloud.paulco.xyz

ip a

nmcli connection show
nmcli con mod enps03 ipv4.addresses 192.168.2.20/24
nmcli con mod enps03 ipv4.gateway 192.168.2.1
nmcli con mod enps03 ipv4.dns “8.8.8.8”
nmcli con mod enps03 ipv4.method manual
nmcli con up enps03

nmcli connection add con-name enp0s3 ifname enp0s3 type ethernet autoconnect yes


cp /etc/sysconfig/network-scripts/ifcfg-eno1 /etc/sysconfig/network-scripts/ifcfg-eno1.bak

vi /etc/sysconfig/network-scripts/ifcfg-eno1

HWADRR=00:23:24:8e:e5:8d
NM_CONTROLLED=no
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.101.230
PREFIX=22
GATEWAY=192.168.100.1
DNS1=202.74.244.5
DNS2=202.74.240.3

nmcli connection up enp0s3

ip a s enp0s3


#systemctl restart network
systemctl restart NetworkManager

echo "192.168.101.230 controller controller.aamra.com" >> /etc/hosts
echo "192.168.101.231 network network.aamra.com" >> /etc/hosts
echo "192.168.101.233 compute compute.aamra.com" >> /etc/hosts

cat /etc/hosts

192.168.0.103 stack stack.aamra.com
192.168.0.103 compute compute.aamra.com
192.168.101.243 network network.aamra.com

#yum install network-scripts -y

systemctl disable --now firewalld NetworkManager

systemctl stop firewalld NetworkManager

systemctl restart network

systemctl start network

systemctl enable network


##
##systemctl status iptables

##systemctl stop iptables

##systemctl disable iptables
##

#Disable selinux
getenforce

setenforce 0

vi /etc/selinux/config
SELINUX=permissive

sudo sed -i 's/^SELINUX=.*/SELINUX=permissive/g' /etc/selinux/config

yum update -y

sudo yum install nano vim wget curl telnet bash-completion screen -y


reboot

++++++ Keypair ++++++
ssh-keygen

cat ~/.ssh/id_rsa.pub

ssh-copy-id root@192.168.101.231

ssh root@192.168.101.231

+++++++++++++++++++++

#yum config-manager --enable powertools

#yum config-manager --set-enabled powertools

yum autoremove epel-release

yum autoremove openstack-packstack
 
yum clean all

yum search centos-release-openstack

yum install -y https://www.rdoproject.org/repos/rdo-release.rpm

#Replace(queens)as your version
yum install -y centos-release-openstack-queens.noarch                

#Remove OpenStack Packages
# yum remove -y centos-release-openstack-wallaby                   


yum update -y

yum install -y openstack-packstack

packstack --version

packstack --help

rpm -qa | grep openstack

++++++++++++++++++++++++++++++++++++++++++++++
Skip Now: Basic Storage Configuration
++++++++++++++++++++++++++++++++++++++++++++++

# Cinder and Swift storage will be on my block device /dev/sdb

sudo parted -s -a optimal -- /dev/sdc mklabel gpt

sudo parted -s -a optimal -- /dev/sdc mkpart primary 0% 70%

sudo parted -s -a optimal -- /dev/sdc mkpart primary 70% 100%

# For Cinder, I’ll create a separate LVM Volume group which uses /dev/sdb1

sudo pvcreate /dev/sdc1
    Physical volume "/dev/sdc1" successfully created. 

sudo vgcreate cinder-volumes /dev/sdc1
    Volume group "cinder-volumes" successfully created

sudo lvcreate -l 100%FREE -T cinder-volumes/cinder-volumes-pool

    Thin pool volume with chunk size 256.00 KiB can address at most 63.25 TiB of data.
     Logical volume "cinder-volumes-pool" created.
  
  
# Swift storage will sit on a partition /dev/sdc2, Let’s create a filesystem on it.

sudo mkfs.xfs /dev/sdb2

## Mount /dev/sdb2

mount /dev/sdb2 /srv/node/device1

&&Another ways only add addi hdd & make partition

mkfs.xfs /dev/sdb

vi /etc/fstab

/dev/sdb2    /opt/devstack   xfs defaults    0 1


mkdir /opt/devstack

mount -a

df -hT

++++++++++++++++++++++++++++++++++++++++++++++

##Default Installation with All in One##

packstack --allinone

++++++++++++++++++++++++++++++++++++++++++++++

##Custom Installation##

packstack --gen-answer-file /root/answers.txt

#Take Copy the answes file

cp answers.txt copy.answers.txt


++++++++++++++++++++++++++++++++++++++++++++++++

##Important: Edit the file whats we install 

vi answers.txt


>>Change to y/n

CONFIG_NTP_SERVERS=0.asia.pool.ntp.org,1.asia.pool.ntp.org,2.asia.pool.ntp.org,3.asia.pool.ntp.org

CONFIG_CONTROLLER_HOST=192.168.10.10

CONFIG_COMPUTE_HOSTS=192.168.10.10

CONFIG_NETWORK_HOSTS=192.168.10.10

CONFIG_STORAGE_HOST=192.168.10.10

CONFIG_KEYSTONE_ADMIN_PW=openstack

#When create swift storage
#CONFIG_SWIFT_STORAGES=/dev/sdb2

CONFIG_PROVISION_DEMO=n

CONFIG_HEAT_INSTALL=y

CONFIG_MAGNUM_INSTALL=y

CONFIG_HEAT_CFN_INSTALL=y

CONFIG_CEILOMETER_INSTALL=y

CONFIG_LBAAS_INSTALL=y

#When create swift storage
#CONFIG_CINDER_VOLUMES_CREATE=n

CONFIG_NOVA_SCHED_RAM_ALLOC_RATIO=3.0

CONFIG_NOVA_LIBVIRT_VIRT_TYPE=%{::default_hypervisor}

CONFIG_HORIZON_SSL=n

+++++ Networking +++++++++
#search and change Bridge to Physical Interface (which access internet)

CONFIG_NEUTRON_OVS_BRIDGE_IFACES=br-ex:enp0s3

#must be check this sections.
#search and check what is ML2_Machanisum & L2_Driver.
#ML2_Machanisum is = openvswitch
#L2_Driver is = openvswitch

# Disable Nagios
CONFIG_NAGIOS_INSTALL=n

++++++++++++++++++++++++++++++++++
##Installation OpenStack##
++++++++++++++++++++++++++++++++++

packstack --answer-file #/root/answers.txt | tee Openstack-Installation-log.txt

++++++++++++++++++++++++++++++++++

## View Installation Log ##



 * The installation log file is available at: 
tail -f /var/tmp/packstack/20230119-111007-GkD8Cn/openstack-setup.log
 
 * The generated manifests are available at: 
 tail -f /var/tmp/packstack/20230119-111007-GkD8Cn/manifests
 
 
++++++++++++++++++++++++++++++++++
After Installation Complete
++++++++++++++++++++++++++++++++++
After Installation Completed Configuration OVS Bridge Networking


++++++++++++++++++++++++++++++++++
##Create an external OVS bridge on your interface.
++++++++++++++++++++++++++++++++++   

## Move your static route for configured interface to br-ex.

cp /etc/sysconfig/network-scripts/ifcfg-eno1 /etc/sysconfig/network-scripts/main-eno1

cp /etc/sysconfig/network-scripts/ifcfg-eno1 /etc/sysconfig/network-scripts/ifcfg-br-ex
    
vi /etc/sysconfig/network-scripts/ifcfg-eno1

DEVICE=eno1
HWADDR=00:23:24:a7:98:83
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=br-ex 
ONBOOT=yes

vi /etc/sysconfig/network-scripts/ifcfg-br-ex

NM_CONTROLLED=no
DEVICE=br-ex
DEVICETYPE=ovs
TYPE=OVSBridge
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.101.231
NETMASK=255.255.252.0
GATEWAY=192.168.100.1
DNS1=8.8.8.8
DNS2=8.8.4.4
DNS3=1.1.1.1
......................................

systemctl restart network.service

ovs-vsctl add-br br-ex

ovs-vsctl show

## Add the network physical interface to the br-ex bridge in Open vSwitch.

ovs-vsctl add-port br-ex eno1; systemctl restart network.service


## Additional bridges can be configured in a similar manner. You’ll need to configure Open vSwitch with correct mappings.

vi /etc/neutron/plugins/ml2/openvswitch_agent.ini 

bridge_mappings=extnet:br-ex

# Restart Nova services.

systemctl restart openstack-nova-compute

systemctl restart openstack-nova-api

systemctl restart openstack-nova-scheduler

++++++++++++++++++++++++++++++++++
 
##Admin Login Page Autho
 
cat keystonerc_admin

.................................................
## OpenStack Services tools
.................................................

yum install  openstack-utils -y

#yum install python-openstackclient* -y

#yum list install openstack-utils* -y

. keystonerc_admin

openstack-status

openstack-service status

openstack-service start

openstack-service restart

openstack-service stop

systemctl status rabbitmq-server.service

systemctl start rabbitmq-server

systemctl restart openstack-nova-network

systemctl enable rabbitmq-server.service

systemctl restart rabbitmq-server.service


openstack-service status cinder

systemctl start neutron-metadata-agent.service

systemctl enable neutron-metadata-agent.service

openstack-service status glance | column -t | grep active

openstack-service restart glance    -restart glance all 

systemctl status openstack-glance-api.service

service rabbitmq-server stop

service rabbitmq-server start

service openstack-nova-compute restart

yum install openstack-nova-compute

#openstack-service list |xargs openstack-service disable

#openstack-service list |xargs openstack-service enable

#openstack-service list |xargs openstack-service stop

#openstack-service list |xargs openstack-service

.................................................
Post Installation On OpenStack
.................................................
#After Install Check

ip a s enp0s3

ip a s br-ex

ovs-vsctl show

+++++++++++++++++++++++++++++++++++++++++
+ How to configure Network in OpenStack +
+++++++++++++++++++++++++++++++++++++++++
#From GUI
#Login openstack dashboard

#Main thing is create network for instance to openstack server network as line real life seniraio. 

1. create public network under Admin section and public subnet here network is must lan network or it could be openstack server network ip which connected by physical network.

2. create private network under project section here networks is private ip as like instance to openstack connection.
.................................................
>>CLI
.................................................

#let’s first create external network in admin tenant using following neutron commands

source keystonerc_admin
or 
. keystonerc_admin

neutron net-create external_network --provider:network_type flat --provider:physical_network extnet --router:external

#Now add a subnet of your flat network to external network by running following neutron command

neutron subnet-create --name public_subnet --enable_dhcp=True --allocation-pool=start=192.168.1.210,end=192.168.1.230 --gateway=192.168.1.1 external_network 192.168.1.0/24

#Create a router by executing the following neutron command and set its gateway using external network

neutron router-create dev-router

neutron router-gateway-set dev-router external_network

#Create private network and attach a subnet to it. Run the following neutron command:

neutron net-create private

neutron subnet-create --name private_subnet private 192.168.100.0/24

#Add pvt_net interface to router “dev_router” using beneath neutron command:

neutron router-interface-add Router  private_subnet
..................................................

.................................................
## Network Configure after OpenStack Installation ##
.................................................

##Create OpenStack private Network.

openstack network create private

##Create subnet for private Network.

openstack subnet create --network private --allocation-pool start=10.1.1.50,end=10.1.1.200 --dns-nameserver 8.8.8.8 --subnet-range 10.1.1.0/24 private_subnet

##Create a public network.

openstack network create --provider-network-type flat --provider-physical-network extnet --external public

##Create subnet for public Network.

openstack subnet create --network public --allocation-pool start=10.101.11.201,end=10.101.11.215 --no-dhcp --subnet-range 10.101.11.0/24 public_subnet

##Add a new router and configure router interfaces.

openstack router create --no-ha router1

##Add Interface in Router

openstack router set --external-gateway public router1

openstack router add subnet router1 private_subnet

ip netns show

%%%%%%%%%
vi /etc/neutron/dhcp_agent.ini

#search
isolated

#edit make true
enable_isolated_metadata=true

systemctl restart neutron-dhcp-agent
%%%%%%%

++++++ Keypair ++++++

cat ~/.ssh/id_rsa.pub

**************************
Network Troubleshooting
**************************
neutron net-list

neutron subnet-list

neutron port-list

neutron port-show 9810105a-edf5-41bc-a140-81ccf71f6bc4

neutron router-show demo-router

neutron router-list

ip netns list

ip netns exec qrouter-8ae4b1fa-fb60-4690-bbe2-febbfbcf7555 route -n

netstat -rn

neutron router-list

ip netns exec qrouter-6f16e8a7-490f-442c-8616-9c8213d7f3df netstat -rn

ip netns exec qrouter-6f16e8a7-490f-442c-8616-9c8213d7f3df arp -an


ip netns exec qrouter-6f16e8a7-490f-442c-8616-9c8213d7f3df ping 10.0.0.1

.................................................
##Now Download Cirros image and then upload it to glance
.................................................

#Cloud-Images for OpenStack
https://docs.openstack.org/image-guide/obtain-images.html

wget http://download.cirros-cloud.net/0.5.1/cirros-0.5.1-x86_64-disk.img

wget https://cloud.centos.org/centos/7/images/CentOS-7-aarch64-GenericCloud-2009.qcow2

wget http://cdimage.debian.org/cdimage/openstack/current-10/debian-10-openstack-amd64.qcow2

wget https://download.fedoraproject.org/pub/fedora/linux/releases/37/Cloud/x86_64/images/Fedora-Cloud-Base-37-1.7.x86_64.qcow2

#Ubuntu Cloud Images Link

https://cloud-images.ubuntu.com/

wget http://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-amd64.img

#wget https://cloud-images.ubuntu.com/bionic/current/bionic-server-cloudimg-arm64.img

#Customized OpenStack Images
https://www.mirantis.com/blog/how-to-manually-create-an-openstack-image/

+++++++++++++++++++++++++++++++++++++++++++++++++
#Create a Instance using image
+++++++++++++++++++++++++++++++++++++++++++++++++


+++++++++++++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Default username/password for Cloud image in OpenStack  +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ref:
https://devicetests.com/ubuntu-cloud-image-openstack-default-password

#Basically Any Cloud Images haven't no default username/password for the cloud image. Need to configure it using below cmd, before creating instance from the image.

virt-customize -a bionic-server-cloudimg-amd64.img --root-password password:typeyourpassword

#Need to install below pkg to get virt-customize cmd.

sudo apt install libguestfs-tools

+++++++++++++++++++++++++++++++++++++++++++++++++
+ How to Access the Instance
+++++++++++++++++++++++++++++++++++++++++++++++++

ssh -i your-priv-key ubuntu@your_machine_ip

+++++++++++++++++++++++++++++++++++++++++++++++++




.................................................
# Create OpenStack Images
.................................................

openstack image create --disk-format qcow2 --container-format bare --public --file cirros-0.5.1-x86_64-disk.img  cirros

openstack image create --disk-format qcow2 --container-format bare --public --file CentOS-7-aarch64-GenericCloud-2009.qcow2  CentOS-7

openstack image create --disk-format qcow2 --container-format bare --public --file jammy-server-cloudimg-amd64.img  Ubuntu-Jammy



openstack image list

openstack image list | grep cirros

openstack image delete cirros

openstack server list

openstack user list

openstack user create --project PROJECT_NAME --password PASSWORD \USERNAME

openstack user set USERNAME --disable

openstack user set USERNAME --enable

openstack server stop

openstack server start

nova reset-state c6bbbf26-b40a-47e7-8d5c-eb17bf65c485

openstack server delete c6bbbf26-b40a-47e7-8d5c-eb17bf65c485

nova reset-state --active c6bbbf26-b40a-47e7-8d5c-eb17bf65c485

#Verify compute services list

openstack compute service list

nova reboot --hard Instance_Name

nova show instance_name

nova-manage service list

nova pause INSTANCE_NAME

nova unpause INSTANCE_NAME

nova suspend INSTANCE_NAME

nova resume INSTANCE_NAME

nova shelve SERVERNAME

nova unshelve SERVERNAME

nova rescue SERVER

nova unrescue SERVER

nova list

openstack flavor list

openstack floating ip list

qemu-img info 

++++++++++++++++++++++++++++++++++++++
+ Create flavors and Security groups +
++++++++++++++++++++++++++++++++++++++
+++++++++++++++++++++++++++++++++++
+ Let’s add OpenStack flavors:    +
+++++++++++++++++++++++++++++++++++

openstack flavor create --id 0 --ram 1024  --vcpus  1 --swap 512   --disk 8     m1.tiny
openstack flavor create --id 2 --ram 2048  --vcpus  1 --swap 1024  --disk 8     m1.small
openstack flavor create --id 3 --ram 4096  --vcpus  2 --swap 2048  --disk 15    m1.medium
openstack flavor create --id 4 --ram 8192  --vcpus  4 --swap 8192  --disk 20    m1.large
openstack flavor create --id 5 --ram 16384 --vcpus  8 --swap 8192  --disk 20   m1.xlarge

++++++++++++++++++++++++++++++++++++++
+ Let's add basic security group     +
++++++++++++++++++++++++++++++++++++++

openstack security group create basic --description "Allow base ports"
openstack security group rule create --protocol TCP --dst-port 22 --remote-ip 0.0.0.0/0 basic
openstack security group rule create --protocol TCP --dst-port 80 --remote-ip 0.0.0.0/0 basic
openstack security group rule create --protocol TCP --dst-port 443 --remote-ip 0.0.0.0/0 basic
openstack security group rule create --protocol ICMP --remote-ip 0.0.0.0/0 basic

+++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Create a new key for your account or use existing   +
+++++++++++++++++++++++++++++++++++++++++++++++++++++++

ssh-keygen -q -N "" 

openstack keypair create --public-key=~/.ssh/id_rsa.pub adminkey 

+++++++++++++++++++++++++++++++++++++++




#Error: Something went wrong! An unexpected error has occurred. Try refreshing the page. If that doesn't help, contact your local administrator.

service apache2 restart
service memcached restart

................................................
How to Convert vhd/image/iso to QCOW2
................................................
##VBoxManage: VDI (VirtualBox) to raw
If you’ve created a VDI image using VirtualBox, you can convert it to raw format using the VBoxManage command-line tool that ships with VirtualBox. On Mac OS X, and Linux, VirtualBox stores images by default in the ~/VirtualBox VMs/ directory. The following example creates a raw image in the current directory from a VirtualBox VDI image.

VBoxManage clonehd ~/VirtualBox\ VMs/image.vdi image.img --format raw

...................................................

.................................................
##Error: If can't reach host to instance
.................................................
cd /etc/neutron/

vi dhcp_agent.ini

>Search

isolated

enable_isolated_metadata = true

systemctl restart neutron-dhcp-agent
.................................................

##Error: When luanch a instance then show the error timeout

#Show nova-compute.log

tail -f /var/log/nova/nova-compute.log

vi /etc/nova/nova.conf.d/100-nova.conf

block_device_allocate_retries = 300
block_device_allocate_retries_interval = 3
.................................................
###

https://www.informaticar.net/openstack-exceeded-maximum-number-of-retries-exhausted-all-hosts-available-for-retrying-build-failures-for-instance/


tail -f /var/log/volume.log

tail -f /var/log/nova/nova-conductor.log
.................................................

###
https://www.linuxtechi.com/create-delete-virtual-machine-command-line-openstack/



firewall-cmd --permanent --add-port=6080/tcp

firewall-cmd --permanent --add-port=6080/udp

firewall-cmd --reload

.............................................
##Error:
NoValidHost: No valid host was found. There are not enough hosts available

Solution:
https://stackoverflow.com/questions/45511739/novalidhost-no-valid-host-was-found-there-are-not-enough-hosts-available

#edit /etc/nova/nova.conf in all the compute node and modify as per your application requirement .

vi /etc/nova/nova.conf

cpu_allocation_ratio = 2.0      (double of physical core can be used for total instance) 
ram_allocation_ratio = 2.0      (double of Total memory can be used for total instance)

#restart nova and nova-scheduler in all the compute node

systemctl restart openstack-nova-*

systemctl restart openstack-nova-scheduler.service

......................................................

................................................
##How to Customize Openstack Dashboard
................................................

1. https://cloud.garr.it/support/kb/cloud/Customize_dashboard/
2. https://medium.com/geekculture/how-to-create-a-personal-cloud-at-home-using-openstack-24061f991048

loginPagelogoSize=300x145 (format=svg)
src="/dashboard/static/dashboard/img/logo-splash.svg"

DashboardlogoSize=300x53
src="/dashboard/static/dashboard/img/logo.svg"

Change into Controller Node:
ll /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/

cp /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/logo-splash.svg /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/old.logo-splash.svg


cp /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/logo-splash.svg /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/old.logo.svg    

rm -rf /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/logo-splash.svg

rm -rf /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/logo.svg

cp /root/logo-splash.svg logo.svg /usr/share/openstack-dashboard/openstack_dashboard/static/dashboard/img/


systemctl restart httpd
systemctl restart memcached

+++++++++++++++++++++++++++++++++++++++++++
How to add a new compute node to existing all-in-one packstack setup
+++++++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++ Not Needed +++++++++++++++++++++++++++++++
##Install OpenVSwitch

#ref: https://www.linuxtechi.com/install-use-openvswitch-kvm-centos-7-rhel-7/

yum install -y https://www.rdoproject.org/repos/rdo-release.rpm


yum install openvswitch libibverbs -y

or

systemctl enable --now openvswitch

systemctl status openvswitch

systemctl restart openvswitch

ovs-vsctl -V

ovs-vsctl show

vi /etc/neutron/plugins/ml2/openvswitch_agent.ini


local_ip=

vi /etc/nova/nova.conf

vncserver_proxyclient_address=

systemctl start openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute 

systemctl restart openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute 

systemctl enable openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute 

+++++++++++++++++++++++++ Not Needed +++++++++++++++++++++++++++++++

##Disable IPtables (How to Turn Off your Firewall)

systemctl status iptables

iptables -L -n -v

iptables -F

iptables -L -n -v

systemctl stop iptables

systemctl disable iptables


#Go to OpenStack AllinOne node 
#

#Edit the answer file

vi answers.txt

EXCLUDE_SERVERS=

CONFIG_COMPUTE_HOSTS=

NTP=

#Before run bellow command, # will be removed.

packstack --answer-file #/root/answers.txt | tee adding-Node-log.txt

#If we get this Error When run avobe command

#Error 1: Pre installing Puppet and discovering hosts' details[ ERROR ].

#Error 2: GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-AlmaLinux.

#Cause: 
Almalinux 8 Update & Upgrade related problem. we need to changes AlmaLinux 8 GPG key.

#Solution:
Ref: https://almalinux.org/blog/2023-12-20-almalinux-8-key-update/
#Import the the GPG key in almalinux8

rpm --import https://repo.almalinux.org/almalinux/RPM-GPG-KEY-AlmaLinux

dnf clean packages

dnf upgrade almalinux-release -y


##Installation is Completed Check Compute Node 

rpm -qa | grep -i openstack

#From Compute Node

tail -f /var/log/nova/nova-compute.log

tail -n 20 /var/log/nova/nova-compute.log

openstack-service status

openstack-service restart

openstack-service start

yum install -y openstack-utils

openstack-status

ovs-vsctl show

##Check on Controller Node

nova hypervisor-list

openstack compute service list

nova-status upgrade check

virsh list --all

nova hypervisor-servers compute2

------------------------------------------------------
systemctl restart openvswitch libvirtd neutron-openvswitch-agent openstack-nova-compute
------------------------------------------------------

---------------------------SomeTimes Needed---------------------------

#From Controller

iptables -L

vi /etc/sysconfig/iptables


iptables -I INPUT -p tcp --dport 5672 -j ACCEPT

iptables -I INPUT -p tcp --dport 15672 -j ACCEPT

iptables -I INPUT -p tcp --dport 3306 -j ACCEPT

#iptables -I INPUT -p tcp --dport 3260 -j ACCEPT

#iptables -A INPUT -p tcp --dport 22 -s 0/0 -j ACCEPT

iptables -I INPUT -p udp --dport 53 -j ACCEPT

iptables -I INPUT -p udp --dport 67 -j ACCEPT

service iptables save

systemctl restart iptables

---------------------------SomeTimes Needed---------------------------

++++++++++++++++++++++++++++++++++++++++++++++
Ways 2: Add Node
+++++++++++++++++++++++++++++++++++++++++++++++

yum install openstack-nova-compute openstack-neutron openstack-neutron-openvswitch -y


sed -i.bak -e 's/\/32/\/16/' /etc/sysconfig/iptables

ls -l /etc/sysconfig/iptables*

systemctl restart iptables

iptables -L

systemctl start openstack-nova-compute openstack-neutron openstack-neutron-openvswitch

systemctl restart openstack-nova-compute openstack-neutron openstack-neutron-openvswitch
+++++++++++++++++++++++++++++++++++++++++++++
Error: OpenStack error: Host is not mapped to any cell

Ref:
https://cloud.tencent.com/developer/article/1501368

Solution:

nova-manage cell_v2 discover_hosts --verbose
++++++++++++++++++++++++++++++++++++++++++++

Error: Exceeded maximum number of retries. Exhausted all hosts available for retrying build failures for instance

Solution:

systemctl restart openstack* neutron* libvirtd

systemctl status openstack* neutron* libvirtd

systemctl restart neutron*



+++++++++++++++++

service openstack-nova-compute restart

systemctl restart openstack-nova-compute.service

+++++++++++++++++++


+++++++++++++++++++++++++++++++++++++++

vim /etc/nova-compute.conf

 [DEFAULT]
 compute_driver=libvirt.LibvirtDriver
 [libvirt]
 virt_type=kvm
 

 lsof -i :15672
 
 rabbitmqctl status
 
 rabbitmqctl cluster_status
 
 rabbitmqctl list_queues
 
 rabbitmq-plugins list
 
 rabbitmq-plugins enable rabbitmq_management
 
 rabbitmqctl list_users
 
 rabbitmqctl change_password admin admin
 
 systemctl restart rabbitmq-server.service
 
+++++++++++++++++++++++++++++++++++++++++++

+++++++++++++++++++++++++++++++++++++++++++
+ OpenStack Error Troubleshootings        + 
+++++++++++++++++++++++++++++++++++++++++++

#Checking Compute services

openstack compute service list --service nova-compute

#Check the maintenance mode status

openstack baremetal node list

#Enable or add compute Host

openstack compute service set --enable <COMPUTE HOST> nova-compute

#Verify hypervisor list

openstack hypervisor list

#Verify nova status

nova-status upgrade check