This update introduces mtce changes to support Active-Active Heartbeating.
The purpose of Active-Active Heartbeating is help avoid Split-Brain.
Active-Active heartbeating has each controller maintain a 5 second
heartbeat response history cache of each network for all monitored
hosts as well as the on-going health of storage-0 if provisioned and
enabled.
This is referred to as the 'heartbeat cluster history'
Each controller then includes its cluster history in each heartbeat
pulse request message.
The hbsClient, now modified to handle heartbeat from both controllers,
saves each controllers' heartbeat cluster history in a local cache and
criss-crosses the data in its pulse responses.
So when the hbsClient receives a pulse request from controller-0 it
saves its reported history and then replaces that history information
in its response to controller-0 with what it saved from controller-1's
last pulse request ; i.e. its view of the system.
Controller-0, receiving a host's pulse response, saves its peers
heartbeat cluster history so that it has summary of heartbeat
cluster history for the last 5 seconds for each monitored network
of every monitored host in the system from both controllers'
perspectives. Same for controller-1 with controller-0's history.
The hbsAgent is then further enhanced to support a query request
for this information.
So now SM, when it needs to make a decision to avoid Split-Brain
or otherwise, can query either controller for its heartbeat cluster
history and get the last 5 second summary view of heartbeat (network)
responsivness from both controllers perspectives to help decide which
controller to make active.
This involved removing the hbsAgent process from SM control and monitor
and adding a new hbsAgent LSB init script for process launch, service
file to run the init script and pmon config file for hbsAgent process
monitoring.
With hbsAgent now running on both controllers, changes to maintenance
were required to send inventory to hbsAgent on both controllers,
listen for hbsAgent event messages over the management interface
and inform both hbsAgents which controller is active.
The hbsAgent running on the inactive controller does not
- does not send heartbeat events to maintenance
- does not send raise or clear alarms or produce customer logs
Test Plan:
Feature:
PASS: Verify hbsAgent runs on both controllers
PASS: Verify hbsAgent as pmon monitored process (not SM)
PASS: Verify system install and cluster collection in all system types (10+)
PASS: Verify active controller hbsAgent detects and handles heartbeat loss
PASS: Verify inactive controller hbsAgent detects and logs heartbeat loss
PASS: Verify heartbeat cluster history collection functions properly.
PASS: Verify storage-0 state tracking in cluster into.
PASS: Verify storage-0 not responding handling
PASS: Verify heartbeat response is sent back to only the requesting controller.
PASS: Verify heartbeat history is correct from each controller
PASS: Verify MNFA from active controller after install to controller-0
PASS: Verify MNFA from active controller after swact to controller-1
PASS: Verify MNFA for 80%+ of the hosts in the storage system
PASS: Verify SM cluster query operation and content from both controllers
PASS: Verify restart of inactive hbsAgent doesn't clear existing heartbeat alarms
Logging:
PASS: Verify cluster info logs.
PASS: Verify feature design logging.
PASS: Verify hbsAgent and hbsClient design logs on all hosts add value
PASS: Verify design logging from both controllers in heartbeat loss case
PASS: Verify design logging from both controllers in MNFA case
PASS: Verify clog logs cluster info vault status and updates for controllers
PASS: Verify clog1 logs full cluster state change for all hosts
PASS: Verify clog2 logs cluster info save/append logs for controllers
PASS: Verify clog3 memory dumps a cluster history
PASS: Verify USR2 forces heartbeat and cluster info log dump
PASS: Verify hourly heartbeat and cluster info log dump
PASS: Verify loss events force heartbeat and cluster info log dump
Regression:
PASS: Verify Large System DOR
PASS: Verify pmond regression test that now includes hbsAgent
PASS: Verify Lock/Unlock of inactive controller (x3)
PASS: Verify Swact behavior (x10)
PASS: Verify compute Lock/Unlock
PASS: Verify storage-0 Lock/Unlock
PASS: Verify compute Host Failure and Graceful Recovery
PASS: Verify Graceful Recovery Retry to Max:3 then Full Enable
PASS: Verify Delete Host
PASS: Verify Patching hbsAgent and hbsClient
PASS: Verify event driven cluster push
Story: 2003576
Task: 24907
Change-Id: I5baf5bcca23601a99473d039356d58250ffb01b5
Signed-off-by: Eric MacDonald <eric.macdonald@windriver.com>
0b922227ac