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adjust some steps

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bybai 2018-06-27 02:57:43 -04:00
parent 75f20e93b0
commit af099caccd
1 changed files with 49 additions and 32 deletions
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docs/source/references/coral/ha/ha_mgmt_node_with_shared_data.rst
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@ -6,7 +6,10 @@ HA Solution Overview
While a xCAT management node ``xcatmn1`` is running as a primary management node, another node - ``xcatmn2`` can be configured to act as primary management node in case ``xcatmn1`` becomes unavailable. The process is manual and requires disabling primary ``xcatmn1`` and activating backup ``xcatmn2``. Both nodes require access to shared storage described below. Use of Virtual IP is also requred.
An interactive sample script ``xcatha`` is availabe to guide through the steps of disabling and activation of xCAT management nodes. ``Dryrun`` option in that scrip allows viewing the actions without executing them.
An interactive sample script `xcatha.py <https://github.com/xcat2/xcat-extensions/blob/master/HA/xcatha.py>`_ is availabe to guide through the steps of disabling and activation of xCAT management nodes. ``Dryrun`` option in that scrip allows viewing the actions without executing them.
Configure and Activate Primary xCAT Management Node
===================================================
Disable And Stop All Related Services on Primary xCAT Management Node
`````````````````````````````````````````````````````````````````````
@ -81,7 +84,7 @@ Existing xCAT management node IP should be configured as Virtual IP address, the
Configure Shared Data
`````````````````````
The following xCAT directory structure should be accessible from both primary and backup xCAT management nodes::
The following xCAT directory structure should be accessible from primary xCAT management node::
/etc/xcat
/install
@ -99,34 +102,10 @@ Synchronize Clock
It is recommended that the clocks are synchrinized between the primary management node and bakup management node.
Remove Virtual IP from primary xCAT Management Node
```````````````````````````````````````````````````
Activate Primary xCAT Management Node
`````````````````````````````````````
``ip addr del 10.5.106.7/8 dev eth0:0``
Activate Backup xCAT Management Node to be Primary Management Node
``````````````````````````````````````````````````````````````````
# Configure Virtual IP
# Add Virtual IP into ``/etc/hosts`` file ::
10.5.106.7 xcatmn1 xcatmn1.cluster.com
# Install xCAT on backup xCAT management node ``xcatmn2``
# Switch to ``PostgreSQL`` database
# Add static management node network interface IP ``10.5.106.5`` into ``PostgreSQL`` configuration file
#. Add ``10.5.106.5`` into ``/var/lib/pgsql/data/pg_hba.conf``::
host all all 10.5.106.5/32 md5
#. Add ``10.5.106.5`` into ``listen_addresses`` variable in ``/var/lib/pgsql/data/postgresql.conf``::
listen_addresses = 'localhost,10.5.106.7,10.5.106.70,10.5.105.5'
# Use ``xcatha.py -a`` to start all related services: ::
Use ``xcatha.py`` interactive activate ``xcatmn1``::
./xcatha.py -a
[Admin] Verify VIP 10.5.106.7 is configured on this node
@ -178,11 +157,49 @@ Activate Backup xCAT Management Node to be Primary Management Node
2018-06-24 22:13:19,353 - DEBUG - makeconservercf [Passed]
2018-06-24 22:13:19,449 - DEBUG - systemctl start conserver [Passed]
# Modify provision network entry ``mgtifname`` as ``eth0:0``::
Activate Backup xCAT Management Node to be Primary Management Node
==================================================================
tabedit networks
"10_0_0_0-255_0_0_0","10.0.0.0","255.0.0.0","eth0:0","10.0.0.103",,"<xcatmaster>",,,,,,,,,,,"1500",,
#. Install xCAT on backup xCAT management node ``xcatmn2`` with local disk
#. Switch to ``PostgreSQL`` database
#. Disable and deactivate services using ``xcatha.py -d`` on both ``xcatmn2`` and ``xcatmn1``
#. Remove Virtual IP from primary xCAT Management Node ``xcatmn1``::
ip addr del 10.5.106.7/8 dev eth0:0
#. Configure Virtual IP on ``xcatmn2``
#. Add Virtual IP into ``/etc/hosts`` file ::
10.5.106.7 xcatmn1 xcatmn1.cluster.com
#. Connect the following xCAT directories to shared data on ``xcatmn2``::
/etc/xcat
/install
~/.xcat
/var/lib/pgsql
/tftpboot
#. Add static management node network interface IP ``10.5.106.5`` into ``PostgreSQL`` configuration file
#. Add ``10.5.106.5`` into ``/var/lib/pgsql/data/pg_hba.conf``::
host all all 10.5.106.5/32 md5
#. Add ``10.5.106.5`` into ``listen_addresses`` variable in ``/var/lib/pgsql/data/postgresql.conf``::
listen_addresses = 'localhost,10.5.106.7,10.5.106.70,10.5.105.5'
#. Use ``xcatha.py -a`` to start all related services on ``xcatmn2``
#. Modify provision network entry ``mgtifname`` as ``eth0:0``::
tabedit networks
"10_0_0_0-255_0_0_0","10.0.0.0","255.0.0.0","eth0:0","10.0.0.103",,"<xcatmaster>",,,,,,,,,,,"1500",,
Unplanned failover: primary xCAT management node is not accessible
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