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Add stale journal file detection

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Added a configurable maximum age for the mysqlmon journal files. If the
file is older than the configured value, it will be ignored and removed.
This commit is contained in:
Markus Mäkelä
2017-03-17 13:37:37 +02:00
parent 40b5e627a2
commit bbcfe98651
5 changed files with 89 additions and 24 deletions
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8
Documentation/Monitors/MySQL-Monitor.md
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@ -200,6 +200,14 @@ external agent that automatically reintegrates failed servers into the
cluster. One of these agents is the _replication-manager_ which automatically
configures the failed servers as new slaves of the current master.
### `journal_max_age`
The maximum journal file age in seconds. The default value is 28800 seconds.
When the MySQL monitor starts, it reads any stored journal files. If the journal
file is older than the value of _journal_max_age_, it will be removed and the
monitor starts with no prior knowledge of the servers.
## MySQL Monitor Crash Safety
Starting with MaxScale 2.2.0, the mysqlmon module keeps an on-disk journal of