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Posted to dev@cloudstack.apache.org by GitBox <gi...@apache.org> on 2022/04/19 13:37:39 UTC
[GitHub] [cloudstack-documentation] Pearl1594 opened a new pull request, #267: Add documentation for live patching systemVMs
Pearl1594 opened a new pull request, #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267
Doc PR for : https://github.com/apache/cloudstack/pull/5831
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[GitHub] [cloudstack-documentation] nvazquez merged pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
nvazquez merged PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267
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[GitHub] [cloudstack-documentation] nvazquez commented on a diff in pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
nvazquez commented on code in PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#discussion_r856344655
##########
source/upgrading/upgrade/_sysvm_restart.rst:
##########
@@ -15,9 +15,46 @@
.. sub-section included in upgrade notes.
-Once you've upgraded the packages on your management servers, you'll
+.. note::
Review Comment:
This is now very long for a note :)
##########
source/upgrading/upgrade/_sysvm_restart.rst:
##########
@@ -15,9 +15,46 @@
.. sub-section included in upgrade notes.
-Once you've upgraded the packages on your management servers, you'll
+.. note::
+
+ From Apache CloudStack version 4.17.0 onward, there is support to live patch
+ system VMs, namely, SSVM, CPVM, Routers. Live patching provides support
+ for zero-downtime upgrades, wherein, the System VM software is updated to the
+ latest code version without having to destroy and recreate them / restart them.
+
+ With this feature, users will have a choice wherein they can use the existing system VM template with the latest
+ software by using the live patch feature, or can follow the usual workflow of restarting the
+ system VM to use the latest system VM template. Live Patching system VMs serves to be especially
+ useful in cases when the code version has upgraded but the template hasn't. In such a scenario users
+ will no longer need to restart the system VMs to use the latest code.
+
+ When one attempts to live-patch the system VMs, it pretty much mimics the patching process
+ that happens when booting up the System VMs but with having to shut down the system VMs.
+ This will update the software packages, which were previously bundled in the systemvm.iso i.e.,
+ agent.zip and cloud-scripts.tgz and restart the services that are present in the /var/cache/cloud/enabled_svcs file
+ in the system VMs. This would mean the following services would be restarted:
+
+ +-----------------+---------------------------+
+ | System VM | Services |
+ +-----------------+---------------------------+
+ | SSVM | cloud, apache2, portmap |
+ +-----------------+---------------------------+
+ | CPVM | cloud |
+ +-----------------+---------------------------+
+ | VRs | haproxy, apache2, dnsmasq |
+ +-----------------+---------------------------+
+
+ Also, with respect to VRs, a network restart without cleanup is initiated to ensure all rules
+ are re-applied.
+
+ **NOTE:** In case there is an absolute need to upgrade the system VM template due to availability of
Review Comment:
Could apply ..note in this case
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[GitHub] [cloudstack-documentation] blueorangutan commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
blueorangutan commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1102670281
Doc build preview: http://qa.cloudstack.cloud/docs/WIP-PROOFING/pr/267. (SL-JID 217)
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[GitHub] [cloudstack-documentation] Pearl1594 commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
Pearl1594 commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1107431480
@blueorangutan docbuild
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[GitHub] [cloudstack-documentation] rohityadavcloud commented on a diff in pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
rohityadavcloud commented on code in PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#discussion_r856110356
##########
source/upgrading/upgrade/_sysvm_restart.rst:
##########
@@ -15,7 +15,22 @@
.. sub-section included in upgrade notes.
-Once you've upgraded the packages on your management servers, you'll
+.. note::
+
+ From Apache CloudStack version 4.17.0 onward, there is support to live patch
+ systemVMs, namely, SSVM, CPVM, Routers. Live patching provides support
+ for zero-downtime upgrades, wherein, the SystemVM software is updated to the
+ latest code version without having to destroy and recreate them / restart them.
+
+ With this feature, users will have a choice wherein they can use the existing systemVM template with the latest
+ software by using the live patch feature, or can follow the usual workflow of restarting the
+ systemVM to use the latest systemVM template. Live Patching systemVMs serves to be especially
+ useful in cases when the code version has upgraded but the template hasn't. In such a scenario users
+ will no longer need to restart the systemVMs to use the latest code.
Review Comment:
@Pearl1594 can you explain in some more detail what is covered in the "zero downtime" and what isn't, esp in the context of CPVM and VRs.
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[GitHub] [cloudstack-documentation] blueorangutan commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
blueorangutan commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1102669259
@Pearl1594 a Jenkins job has been kicked to build the document. I'll keep you posted as I make progress.
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[GitHub] [cloudstack-documentation] rohityadavcloud commented on a diff in pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
rohityadavcloud commented on code in PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#discussion_r856107080
##########
source/upgrading/upgrade/_sysvm_restart.rst:
##########
@@ -15,7 +15,22 @@
.. sub-section included in upgrade notes.
-Once you've upgraded the packages on your management servers, you'll
+.. note::
+
+ From Apache CloudStack version 4.17.0 onward, there is support to live patch
+ systemVMs, namely, SSVM, CPVM, Routers. Live patching provides support
+ for zero-downtime upgrades, wherein, the SystemVM software is updated to the
+ latest code version without having to destroy and recreate them / restart them.
+
+ With this feature, users will have a choice wherein they can use the existing systemVM template with the latest
Review Comment:
```suggestion
With this feature, users will have a choice wherein they can use the existing System VM template with the latest
```
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[GitHub] [cloudstack-documentation] Pearl1594 commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
Pearl1594 commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1106465802
@blueorangutan docbuild
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[GitHub] [cloudstack-documentation] Pearl1594 commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
Pearl1594 commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1105097411
@rohityadavcloud Could you please help review the content of the doc PR. Thanks
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[GitHub] [cloudstack-documentation] blueorangutan commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
blueorangutan commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1106609693
@nvazquez a Jenkins job has been kicked to build the document. I'll keep you posted as I make progress.
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[GitHub] [cloudstack-documentation] rohityadavcloud commented on a diff in pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
rohityadavcloud commented on code in PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#discussion_r856108200
##########
source/upgrading/upgrade/_sysvm_restart.rst:
##########
@@ -15,7 +15,22 @@
.. sub-section included in upgrade notes.
-Once you've upgraded the packages on your management servers, you'll
+.. note::
+
+ From Apache CloudStack version 4.17.0 onward, there is support to live patch
+ systemVMs, namely, SSVM, CPVM, Routers. Live patching provides support
+ for zero-downtime upgrades, wherein, the SystemVM software is updated to the
+ latest code version without having to destroy and recreate them / restart them.
+
+ With this feature, users will have a choice wherein they can use the existing systemVM template with the latest
Review Comment:
(comment being, use consist terms - either systemvm or SystemVM or System VM or system-vm
##########
source/upgrading/upgrade/_sysvm_restart.rst:
##########
@@ -15,7 +15,22 @@
.. sub-section included in upgrade notes.
-Once you've upgraded the packages on your management servers, you'll
+.. note::
+
+ From Apache CloudStack version 4.17.0 onward, there is support to live patch
+ systemVMs, namely, SSVM, CPVM, Routers. Live patching provides support
+ for zero-downtime upgrades, wherein, the SystemVM software is updated to the
+ latest code version without having to destroy and recreate them / restart them.
+
+ With this feature, users will have a choice wherein they can use the existing systemVM template with the latest
Review Comment:
(comment being, use consistent terms - either systemvm or SystemVM or System VM or system-vm
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[GitHub] [cloudstack-documentation] nvazquez commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
nvazquez commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1106609370
@blueorangutan docbuild
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[GitHub] [cloudstack-documentation] blueorangutan commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
blueorangutan commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1106610702
Doc build preview: http://qa.cloudstack.cloud/docs/WIP-PROOFING/pr/267. (SL-JID 229)
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[GitHub] [cloudstack-documentation] blueorangutan commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
blueorangutan commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1107431744
@Pearl1594 a Jenkins job has been kicked to build the document. I'll keep you posted as I make progress.
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[GitHub] [cloudstack-documentation] blueorangutan commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
blueorangutan commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1107432136
Doc build preview: http://qa.cloudstack.cloud/docs/WIP-PROOFING/pr/267. (SL-JID 230)
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[GitHub] [cloudstack-documentation] Pearl1594 commented on pull request #267: Add documentation for live patching systemVMs
Posted by GitBox <gi...@apache.org>.
Pearl1594 commented on PR #267:
URL: https://github.com/apache/cloudstack-documentation/pull/267#issuecomment-1102667897
@blueorangutan docbuild
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