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Bug 1514060 - [Docs] OSP Installation and usage, section: 8.4. Replacing Controller Nodes -- should include a note about updating the fencing config
Summary: [Docs] OSP Installation and usage, section: 8.4. Replacing Controller Nodes -...
Keywords:
Status: ASSIGNED
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: documentation
Version: 10.0 (Newton)
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: ---
: ---
Assignee: Dan Macpherson
QA Contact: RHOS Documentation Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2017-11-16 15:13 UTC by Matt Flusche
Modified: 2019-04-12 05:26 UTC (History)
3 users (show)

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Description Matt Flusche 2017-11-16 15:13:16 UTC
Description of problem:
Doc: OSP Installation and usage, 
Section: 8.4. Replacing Controller Nodes

There should be notes in this section on updating the fencing/stonith pacemaker config. 

Version-Release number of selected component (if applicable):


How reproducible:


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Comment 1 Dan Macpherson 2018-08-07 06:20:43 UTC
I had a readthrough of the procedure and it looks like we're missing two things:


1. The user must configure fencing to accommodate the new node. You can xref to the following content:

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/10/html/director_installation_and_usage/chap-performing_tasks_after_overcloud_creation#sect-Fencing_the_Controller_Nodes

2. The user needs to re-enable fencing (we disable it in the beginning).

So from the undercloud, the command to use is:

---
ssh heat-admin@192.168.0.47 "sudo pcs property set stonith-enabled=true"
---

heat-admin@192.168.0.47 is the controller node we originally disabled it on.

So we need an additional section on re-enabling fencing that accommodates these two items fencing.

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Side note: For OSP 11+, we configure the fencing via director:

https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/11/html/advanced_overcloud_customization/sect-fencing_the_controller_nodes

So we'll still need a fencing config section for OSP11+ but it must come before we run the "openstack overcloud deploy" command.


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