Difference between revisions of "Infrastructure Virtualization Project"

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{{WorkInProgress}}
 
{{WorkInProgress}}
−
===Objective===
+
'''Last Update:''' May 22, 2022
 +
=Objective=
 
This is a project to update and modernize the infrastructure that keeps the Amahi web sites and services running.
 
This is a project to update and modernize the infrastructure that keeps the Amahi web sites and services running.
  
Line 7: Line 8:
 
'''NOTE:''' this project is not about running Amahi platform software on virtual servers, etc. For that there is a separate page on [[Virtualization]].
 
'''NOTE:''' this project is not about running Amahi platform software on virtual servers, etc. For that there is a separate page on [[Virtualization]].
  
−
===Goals===
+
=Goals=
 
We have multiple goals:
 
We have multiple goals:
−
* run some of internal build machines in a reliable, efficient way, so that we have consistent and updated builds/releases
+
* Operate internal build machines in a reliable, efficient way, so that we have consistent and updated builds/releases
−
* have consistent and recent backups making things recoverable
+
* Consistent and recent backups making things recoverable
−
* run some testing of Amahi apps more easily and efficiently
+
* Execute some testing of Amahi apps more easily and efficiently
−
* test new features in an isolated manner
+
* Test new features in an isolated manner
−
...
 
  
−
===Known Issues===
+
=Configuration=
−
* Controller node is memory intensive
+
'''Dell Server (F1DH):'''
−
* Image resizing does not work
 
−
* Volumes resizing does not work
 
−
* Suspending instance with volume attached does not work after reboot
 
−
 
 
−
===Pending Actions===
 
−
* <s>Set up floating IP address range</s>
 
−
* Create automated VM backup routine
 
−
* <s>Create Fedora 19 32- and 64-bit minimal install images</s>
 
−
* Create Amahi 7 Express CD image
 
−
 
 
−
===Hardware===
 
−
Dell Rack Server
 
 
* Dual Xeon E5450 3.0 GHz Processors
 
* Dual Xeon E5450 3.0 GHz Processors
−
* 8GB PC2-5300 RAM (8x1)
+
* Gigabit Network Interface
−
* Two Gigabit Network Interfaces
 
 
* KVM Network Interface
 
* KVM Network Interface
 
* RAID Controller
 
* RAID Controller
−
* Four Quick Swap Drive Bays
+
<br>
−
** 1 - 1 TB (OS and Backup)
+
'''Server #1 (CURRENT):'''
−
** 2 - 120GB SSD (VMs)
+
* OpenStack release Yoga
−
** 3 - Empty
+
* Operating System: CentOS 8 Stream
−
** 4 - Empty
+
* 32GB PC2-5300 RAM (8x4)
 +
* Quick Swap Drive Bays
 +
** 1 - 1TB
 +
** 2 - 750GB (Backup)
 +
** 3 - EMPTY
 +
** 4 - EMPTY
 +
<br>
 +
'''Server #2 (BACKUP):'''
 +
* OpenStack release Wallaby
 +
* Operating System: CentOS 8 Stream
 +
* 24GB PC2-5300 RAM (4x2/8x2)
 +
* Quick Swap Drive Bays
 +
** 1 - 850GB (LVM)
 +
** 2 - EMPTY
 +
** 3 - 120GB SSD (Backup)
 +
** 4 - EMPTY
 +
 
 +
=Setup=
 +
The following guidance is based on the latest release of OpenStack (Yoga):
 +
<ul>
 +
<li> Download [https://www.centos.org/download/ CentOS 8 Stream] minmal image and install following [https://linuxhint.com/install_centos8_netboot_iso/ Installing CentOS 8 using NetBoot ISO Image] tutorial (use LVM, but remove ''/home'' partition and redistribute space to ''/'').  </li>
 +
<li> [https://linuxconfig.org/rhel-8-configure-static-ip-address Set Static IP Address] and [https://techjourney.net/how-to-set-change-hostname-fqdn-fully-qualified-domain-name-in-rhel-centos-7/ configure Fully Qualified Domain Name], then reboot</li>
 +
<li> Follow step 0 - 3 of the [https://www.rdoproject.org/install/packstack/ RDO Packstack Quickstart] for the OpenStack installation (ensure step 0 prerequisites are completed first).</li>
 +
<li> At step 4, follow the [https://www.rdoproject.org/networking/neutron-with-existing-external-network/ Neutron with existing network guidance]:</li>
 +
<ul>
 +
<li> Use command: <code>packstack --allinone --provision-demo=n --cinder-volumes-size=100G --keystone-admin-passwd={set password} --os-neutron-ml2-mechanism-drivers=openvswitch --os-neutron-ml2-tenant-network-types=vxlan --os-neutron-ml2-type-drivers=vxlan,flat,vlan --os-neutron-l2-agent=openvswitch --os-neutron-ovs-bridge-mappings=extnet:br-ex --os-neutron-ovs-bridge-interfaces=br-ex:eth0 --nova-libvirt-virt-type=kvm</code> (replace {set password} and ''eth0'' with appropriate values)</li>
 +
<li> Skip down to ''Now, create the external network with Neutron.'' and follow guidance.</li>
 +
<li> Next move to ''Then create a router and set its gateway using the external network...'' and follow remaining guidance.</li>
 +
</ul>
 +
<li> Set up the floating IP addresses to the external network.</li>
 +
<li> Create flavors named ''amahi.small'' of 10GB and ''amahi.medium'' of 15GB.
 +
<li> Add the following rules to ''default'' Security Group (Ingress, IPv4, Remote IP 0.0.0.0):
 +
<ul>
 +
<li> ICMP / Any</li>
 +
<li> TCP / 22</li>
 +
<li> TCP / 80</li>
 +
<li> TCP / 3000</li>
 +
<li> TCP / 443 (<i>Optional</i>)</li>
 +
</ul>
 +
<li> Add users and private keys for SSH login</li>
 +
<li> Disable SSH password and root login</li>
 +
<li> Add users to web UI access</li>
 +
<li> Ensure OS updates applied and reboot</li>
 +
<li> Create a single instance with floating IP</li>
 +
<li> Verify all is working as expected.</li>
 +
</ul>
 +
 
  
−
===Software===
+
<b>NOTE:</b> A terminal script has been developed to automate the installation steps above for OpenStack after CentOS is installed.
−
* CentOS 7 x86_64 (Minimal)
 
−
* OpenStack Juno Release
 
  
−
===Setup===
+
=Naming Convention=
−
* Download and install [http://isoredirect.centos.org/centos/7/isos/x86_64/ CentOS 7 x86_64 minimal] image
+
The following is recommended for standardization:
−
* Configure FQDN (<code>/etc/hosts</code> and <code>/etc/hostname</code>)
+
* Instances: '''os-function''' (i.e. ''f24-bot'', ''f24-repo'', ''f24-dev'', etc)
−
* Manually configure networking (set static IP address)
+
* Images: '''os-type''' (i.e. ''f24-cd'', ''f24-dvd'', etc)
−
* Add users and private keys for SSH login
+
* Snapshot:  '''os-function-ss#''' (i.e. ''f24-repo-ss1'', ''f24-bot-ss2'', etc)
−
* Disable SSH password and root login
+
* Volumes: '''instance-vol''' (i.e. ''f24-repo-vol'', ''mirrormgr-vol'', ''dlmaster-vol'', etc)
−
* Enable EPEL Repo
 
−
:<code>yum install epel-release</code>
 
−
:or
 
−
:<code>rpm -Uvh <nowiki>http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-2.noarch.rpm</nowiki></code>
 
−
* Perform OS update
 
−
:<code>yum -y update</code>
 
−
* Install OpenStack following [https://openstack.redhat.com/Quickstart RDO Quickstart] instructions (run <code>packstack --allinone</code> as '''root''')
 
−
* Configure network bridging (refer to [https://openstack.redhat.com/Neutron_with_existing_external_network RDO Reference])
 
−
** Set <code>CONFIG_PROVISION_ALL_IN_ONE_OVS_BRIDGE=n</code> in ''packstack-answers-20141028-205455.txt''
 
−
** Executed <code>packstack --answer-file=packstack-answers-20141028-205455.txt</code> (as '''root''')
 
−
** Created ''/etc/sysconfig/network-scripts/ifcfg-br-ex''
 
−
** Revised ''/etc/sysconfig/network-scripts/ifcfg-enp9s0f0''
 
−
** Appended lines to ''/etc/neutron/plugin.ini''
 
−
** Restarted the network service
 
−
** Removed router and subnet ('''ALL''' instances must be terminated to remove subnet)
 
−
** Recreated subnet with IP address allocation range (set floating IP addresses)
 
−
** Recreated router to match gateway
 
−
* Configure DNS to access internet
 
−
** Edit <code>/etc/neutron/dhcp_agent.ini</code> and uncomment the line below:
 
−
<pre># Comma-separated list of DNS servers which will be used by dnsmasq
 
−
# as forwarders.
 
−
# dnsmasq_dns_servers = </pre>
 
−
: and add <code>8.8.8.8,8.8.4.4</code> after equal (=), then reboot as I could not determine what services to restart.
 
−
* Extend cinder-volumes past 20GB to allow for creating additional volumes to attach to instances.
 
−
** Followed the [https://udaraliyanage.wordpress.com/2014/05/23/openstack-increase-volume-capacity OpenStack Increase Volume Capacity] tutorial
 
−
** Created 50Gb additional space for volumes.
 
−
** Substituted ''cinder-volumes'' for instances of ''stack-volumes'' in commands
 
−
** Total volume space available is now 70GB.
 
  
−
===Build Images===
+
=Build Images=
−
This will outline how to build OpenStack images using Proxmox VE.
+
This will outline how to build OpenStack images using [https://www.proxmox.com/en/ Proxmox VE] (alternate method in development).
 
* Log into Proxmox VE web UI
 
* Log into Proxmox VE web UI
−
* Create a VM or clone an existing one
+
* Create a VM or clone an existing one (<code><i>type</i>=qemu64</code>)
−
*# If creating a VM, install the OS
+
** If creating a VM, install the OS
−
*# If using a clone, start the VM
+
** If using a clone, start the VM
 
* Open a console window for the VM
 
* Open a console window for the VM
−
*# Log in and as root do the following
+
** Log in and as <code>root</code> do the following
−
*#* <code>dd if=/dev/zero of=/mytempfile bs=1M</code> (zero out any unused space)
+
*** <code>dd if=/dev/zero of=/mytempfile bs=1M</code> (zero out any unused space)
−
*#* <code>rm -f /mytempfile</code>
+
*** <code>rm -f /mytempfile</code>
−
*# Shutdown VM
+
** Shutdown VM
−
*# Log into Proxmox VE via SSH and execute the following from command line
+
** Log into Proxmox VE via SSH and execute the following from command line
−
*#* Navigate to <code>/var/lib/vz/###</code> (number of VM)
+
*** Navigate to <code>/dev/pve</code>
−
*#* <code>mv original_image.qcow2 original_image.qcow2_backup</code> (rename original image)
+
*** <code>qemu-img convert -O qcow2 original_image new_image.qcow2</code>
−
*#* <code>qemu-img convert -O qcow2 original_image.qcow2_backup original_image.qcow2</code>
+
*** Copy <code>new_image.qcow2</code> to a safe location for uploading into OpenStack
−
*#* Copy new <code>.qcow2</code> image to a safe location for uploading into OpenStack
+
*** Delete the VM from Proxmox VE web UI
−
*#* Remove <code>.backup</code> file
+
* Use WinSCP or similar program to copy the <code>new_image.qcow2</code> to client machine
−
*#* Delete the VM from Proxmox VE web UI
 
−
* Use WINScp or similar program to copy the <code>.qcow2</code> image to client machine
 
 
* Upload into OpenStack via the web UI
 
* Upload into OpenStack via the web UI
  
  
−
'''REF:'''  [http://www.jamescoyle.net/how-to/323-reclaim-disk-space-from-a-sparse-image-file-qcow2-vmdk Reclaim disk space from .qcow2 or .vmdk image]
+
'''Reference:'''  [https://gazelle.ihe.net/book/export/html/917 Transfer Proxmox VM]
 +
 
 +
=Create Instance=
 +
This is a nice straightforward tutorial on [https://www.tecmint.com/create-deploy-and-launch-virtual-machines-in-openstack/ how to deploy and launch an instance (VM)].
 +
 
 +
Also refer to [https://docs.openstack.org/mitaka/user-guide/cli_nova_launch_instance_using_ISO_image.html launch instance from ISO] for an alternate method.
 +
 
 +
=Backup=
 +
'''Last Backup completed:'''
 +
* Instances - ''04 Jul 2021''
 +
* Volumes - ''04 Jul 2021''
 +
 
 +
 
 +
'''NOTES:'''
 +
* Back up scripts have been created to synchronize instances, volumes, and snapshots to a secondary drive on demand.
 +
* Minimal of monthly back ups be done in case of catastrophic failure.
 +
* See [https://github.com/Nexenture/openstack-instances-backups OpenStack Instance Backups] to automate via terminal script (some modification is needed).
 +
 
 +
=Tips=
 +
==Command Line==
 +
[https://docs.openstack.org/python-openstackclient/ussuri/ OpenStack Command Line Guide]
 +
==Network Issues==
 +
If the DNS server is changed or networking appears inoperable, check the following to ensure the DNS is correct:
 +
* ''/etc/sysconfig/network-scripts/ifcfg-br-ex''
 +
* ''/etc/resolve.conf''
 +
 
 +
 
 +
Next restart neutron network services:
 +
<code>
 +
:service neutron-server restart<br />
 +
:service neutron-dhcp-agent restart<br />
 +
:service neutron-l3-agent restart<br />
 +
:service neutron-metadata-agent restart<br />
 +
:service neutron-openvswitch-agent restart
 +
</code>
 +
 
 +
==Volume Issues==
 +
When a volume becomes detached and/or shows in error, the state can be reset:
 +
<code>
 +
:source keystonerc_admin
 +
:cinder reset-state ''volume_id''
 +
</code>
 +
or use web UI.
 +
 
 +
Also refer to [https://bugs.amahi.org/issues/2051 Amahi Bug #2051].
 +
 
 +
==Instance Issues==
 +
When an instance '''Status''' reflects an ''error'' state, reset it by:
 +
<code>
 +
:source keystonerc_admin
 +
:nova reset-state --active INSTANCE_ID
 +
</code>
 +
 
 +
'''NOTE:''' Should the '''Power State''' reflect ''no state'' or blank, it can be corrected by doing the above step, then starting the instance.
 +
 
 +
==Update/Reboot/Shutdown Process==
 +
Follow guidelines below to prevent corruption:
 +
* Shutdown/Disconnect
 +
** Stop all instances
 +
** Verify all instances stopped
 +
** Perform Update/Reboot/Shutdown
 +
<br>
 +
* Once system Started/Rebooted:
 +
** Start all needed instances
 +
** Verify all instances are operational
 +
 
 +
==Create Static IP for Instance==
 +
Setting a static IP for instances will ensure the internal IP address remains the same through it's life cycle.  The floating IP address can be easily added afterwards.
 +
* As root user, execute <code>source keystonerc_admin</code>
 +
* Use the following to reserve the IP address:
 +
<code>
 +
:openstack port create --network private --fixed-ip subnet_id=private_subnet,ip_address=x.x.x.x static-ip-1
 +
</code>
 +
* Create the instance and boot via command-line vs the web UI:
 +
<code>
 +
:openstack server create --image IMAGE_NAME --flavor amahi.small --nic port-id=NETWORK_ID_FROM_ABOVE_COMMAND INSTANCE_NAME
 +
</code>
 +
 
 +
:'''NOTE:'''  If image name has spaces, enclose it in double quotes.
 +
Ref:  [https://ask.openstack.org/en/question/30690/add-multiple-specific-ips-to-instance/ Add Multiple Specific IPs to Instance]
 +
 
 +
==Change Instance Flavor==
 +
As ''root'' user:
 +
<code>
 +
:source keystonerc_admin
 +
</code>
 +
See [https://docs.openstack.org/newton/user-guide/cli-change-the-size-of-your-server Change the size of your server] for command line guidance.
 +
 
 +
==Fedora Cloud Base Images==
 +
See [https://alt.fedoraproject.org/cloud/ Fedora Cloud Base Images] for guidance.
 +
 
 +
== Migration ==
 +
=== Images ===
 +
See [https://raymii.org/s/tutorials/Openstack_Glance_Image_Download.html OpenStack Glance Image Download Tutorial] for how to transfer images from one server to another.
 +
 
 +
=== Snapshots ===
 +
See [https://community.cisco.com/t5/cloud-blogs/how-to-snapshot-an-openstack-nova-instance-boot-it-download/ba-p/3661228 Snapshot an OpenStack instance, boot it, and download] for how to transfer snapshots from one instance to another.
 +
 
 +
=== Volumes ===
 +
See [http://blog.oddbit.com/2015/09/29/migrating-cinder-volumes-between-openstack-environments/ Migrating cinder volumes between OpenStack environments] for how to transfer volumes from one instance to another.
  
−
===Create Instance===
+
==Fix Broken Web UI==
−
This is a nice straight forward tutorial on [https://community.hpcloud.com/article/creating-your-first-instance-0 Creating an instance].
+
Add the following line to ''/etc/httpd/conf.d/15-horizon_vhost.conf'':
 +
WSGIApplicationGroup %{GLOBAL}
 +
Then restart the web server
  
−
===Notes===
+
Ref: [https://ask.openstack.org/en/question/91352/openstack-mitaka-can-not-access-dashboard/ OpenStack cannot access Dashboard]
−
* the floating IPs situation may not work on non-externally routed IPs. this may be why they set up a 179. "public" network by detafult in the RDO setup. i deleted that network  
 
−
* the external network needs to be "flagged" as external. this cannot be done with the UI, but i am told the juno release has a feature where attribute editing. so that the external attribute can be set to Yes. once that is done, MAYBE the system allows floating IPs in that network even if the IP range is not externally routable
 
−
* basically understand what it takes to get an image created, seasoned, and how we need to maintain these over long periods. i think the main workhorse is qcow2 tools.
 
−
* these images are like "snapshots" in some way, but a snapshot is frozen and cannot be tweaked.
 
−
* long term we want to make images like this for testing, e.g. and amahi 7 image that is bootable and it's plain instal. another example is a fully up to date amahi 7 image, etc.
 
−
* so they are alive in that these images are frozen in time, but one takes a copy and can then evolve it into a new version of the image.
 
−
* Refer to [https://raymii.org/s/articles/Fix_inconsistent_Openstack_volumes_and_instances_from_Cinder_and_Nova_via_the_database.html Fix inconsistent OpenStack volumes and instances from Cinder and Nova via the database] for correcting instances in error ('''NOTE:'''  Use extreme caution as this could corrupt the database.)  <u>ALWAYS</u> back up the database before making any changes!
 
  
−
===Tips===
+
=Known Issues=
−
* When a volume becomes detached and/or shows in error, the state can be reset.
+
Cannot use multiple SSH keys via Dashboard ([https://bugs.launchpad.net/nova/+bug/1499751 OpenStack Bug #1499751])
−
** <code>source keystonerc_admin</code>
+
<br>
−
** <code>cinder reset-state ''volume_id''</code>
 
−
<br />
 

Latest revision as of 02:23, 26 May 2022

Msgbox-WOPr.png Work In Progress
This article is currently undergoing major expansion or restructuring. You are welcome to assist by editing it as well. If this article has not been edited in several days, please remove this template.


Last Update: May 22, 2022

Objective

This is a project to update and modernize the infrastructure that keeps the Amahi web sites and services running.

The idea is to provide easier and more sustainable management of the infrastructure to leave more time for the team to devote to moving the project forward.

NOTE: this project is not about running Amahi platform software on virtual servers, etc. For that there is a separate page on Virtualization.

Goals

We have multiple goals:

  • Operate internal build machines in a reliable, efficient way, so that we have consistent and updated builds/releases
  • Consistent and recent backups making things recoverable
  • Execute some testing of Amahi apps more easily and efficiently
  • Test new features in an isolated manner

Configuration

Dell Server (F1DH):

  • Dual Xeon E5450 3.0 GHz Processors
  • Gigabit Network Interface
  • KVM Network Interface
  • RAID Controller


Server #1 (CURRENT):

  • OpenStack release Yoga
  • Operating System: CentOS 8 Stream
  • 32GB PC2-5300 RAM (8x4)
  • Quick Swap Drive Bays
    • 1 - 1TB
    • 2 - 750GB (Backup)
    • 3 - EMPTY
    • 4 - EMPTY


Server #2 (BACKUP):

  • OpenStack release Wallaby
  • Operating System: CentOS 8 Stream
  • 24GB PC2-5300 RAM (4x2/8x2)
  • Quick Swap Drive Bays
    • 1 - 850GB (LVM)
    • 2 - EMPTY
    • 3 - 120GB SSD (Backup)
    • 4 - EMPTY

Setup

The following guidance is based on the latest release of OpenStack (Yoga):

  • Download CentOS 8 Stream minmal image and install following Installing CentOS 8 using NetBoot ISO Image tutorial (use LVM, but remove /home partition and redistribute space to /).
  • Set Static IP Address and configure Fully Qualified Domain Name, then reboot
  • Follow step 0 - 3 of the RDO Packstack Quickstart for the OpenStack installation (ensure step 0 prerequisites are completed first).
  • At step 4, follow the Neutron with existing network guidance:
    • Use command: packstack --allinone --provision-demo=n --cinder-volumes-size=100G --keystone-admin-passwd={set password} --os-neutron-ml2-mechanism-drivers=openvswitch --os-neutron-ml2-tenant-network-types=vxlan --os-neutron-ml2-type-drivers=vxlan,flat,vlan --os-neutron-l2-agent=openvswitch --os-neutron-ovs-bridge-mappings=extnet:br-ex --os-neutron-ovs-bridge-interfaces=br-ex:eth0 --nova-libvirt-virt-type=kvm (replace {set password} and eth0 with appropriate values)
    • Skip down to Now, create the external network with Neutron. and follow guidance.
    • Next move to Then create a router and set its gateway using the external network... and follow remaining guidance.
  • Set up the floating IP addresses to the external network.
  • Create flavors named amahi.small of 10GB and amahi.medium of 15GB.
  • Add the following rules to default Security Group (Ingress, IPv4, Remote IP 0.0.0.0):
    • ICMP / Any
    • TCP / 22
    • TCP / 80
    • TCP / 3000
    • TCP / 443 (Optional)
  • Add users and private keys for SSH login
  • Disable SSH password and root login
  • Add users to web UI access
  • Ensure OS updates applied and reboot
  • Create a single instance with floating IP
  • Verify all is working as expected.


NOTE: A terminal script has been developed to automate the installation steps above for OpenStack after CentOS is installed.

Naming Convention

The following is recommended for standardization:

  • Instances: os-function (i.e. f24-bot, f24-repo, f24-dev, etc)
  • Images: os-type (i.e. f24-cd, f24-dvd, etc)
  • Snapshot: os-function-ss# (i.e. f24-repo-ss1, f24-bot-ss2, etc)
  • Volumes: instance-vol (i.e. f24-repo-vol, mirrormgr-vol, dlmaster-vol, etc)

Build Images

This will outline how to build OpenStack images using Proxmox VE (alternate method in development).

  • Log into Proxmox VE web UI
  • Create a VM or clone an existing one (type=qemu64)
    • If creating a VM, install the OS
    • If using a clone, start the VM
  • Open a console window for the VM
    • Log in and as root do the following
      • dd if=/dev/zero of=/mytempfile bs=1M (zero out any unused space)
      • rm -f /mytempfile
    • Shutdown VM
    • Log into Proxmox VE via SSH and execute the following from command line
      • Navigate to /dev/pve
      • qemu-img convert -O qcow2 original_image new_image.qcow2
      • Copy new_image.qcow2 to a safe location for uploading into OpenStack
      • Delete the VM from Proxmox VE web UI
  • Use WinSCP or similar program to copy the new_image.qcow2 to client machine
  • Upload into OpenStack via the web UI


Reference: Transfer Proxmox VM

Create Instance

This is a nice straightforward tutorial on how to deploy and launch an instance (VM).

Also refer to launch instance from ISO for an alternate method.

Backup

Last Backup completed:

  • Instances - 04 Jul 2021
  • Volumes - 04 Jul 2021


NOTES:

  • Back up scripts have been created to synchronize instances, volumes, and snapshots to a secondary drive on demand.
  • Minimal of monthly back ups be done in case of catastrophic failure.
  • See OpenStack Instance Backups to automate via terminal script (some modification is needed).

Tips

Command Line

OpenStack Command Line Guide

Network Issues

If the DNS server is changed or networking appears inoperable, check the following to ensure the DNS is correct:

  • /etc/sysconfig/network-scripts/ifcfg-br-ex
  • /etc/resolve.conf


Next restart neutron network services:

service neutron-server restart
service neutron-dhcp-agent restart
service neutron-l3-agent restart
service neutron-metadata-agent restart
service neutron-openvswitch-agent restart

Volume Issues

When a volume becomes detached and/or shows in error, the state can be reset:

source keystonerc_admin
cinder reset-state volume_id

or use web UI.

Also refer to Amahi Bug #2051.

Instance Issues

When an instance Status reflects an error state, reset it by:

source keystonerc_admin
nova reset-state --active INSTANCE_ID

NOTE: Should the Power State reflect no state or blank, it can be corrected by doing the above step, then starting the instance.

Update/Reboot/Shutdown Process

Follow guidelines below to prevent corruption:

  • Shutdown/Disconnect
    • Stop all instances
    • Verify all instances stopped
    • Perform Update/Reboot/Shutdown


  • Once system Started/Rebooted:
    • Start all needed instances
    • Verify all instances are operational

Create Static IP for Instance

Setting a static IP for instances will ensure the internal IP address remains the same through it's life cycle. The floating IP address can be easily added afterwards.

  • As root user, execute source keystonerc_admin
  • Use the following to reserve the IP address:

openstack port create --network private --fixed-ip subnet_id=private_subnet,ip_address=x.x.x.x static-ip-1

  • Create the instance and boot via command-line vs the web UI:

openstack server create --image IMAGE_NAME --flavor amahi.small --nic port-id=NETWORK_ID_FROM_ABOVE_COMMAND INSTANCE_NAME

NOTE: If image name has spaces, enclose it in double quotes.

Ref: Add Multiple Specific IPs to Instance

Change Instance Flavor

As root user:

source keystonerc_admin

See Change the size of your server for command line guidance.

Fedora Cloud Base Images

See Fedora Cloud Base Images for guidance.

Migration

Images

See OpenStack Glance Image Download Tutorial for how to transfer images from one server to another.

Snapshots

See Snapshot an OpenStack instance, boot it, and download for how to transfer snapshots from one instance to another.

Volumes

See Migrating cinder volumes between OpenStack environments for how to transfer volumes from one instance to another.

Fix Broken Web UI

Add the following line to /etc/httpd/conf.d/15-horizon_vhost.conf: 

WSGIApplicationGroup %{GLOBAL}

Then restart the web server

Ref: OpenStack cannot access Dashboard

Known Issues

Cannot use multiple SSH keys via Dashboard (OpenStack Bug #1499751)

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