5289fc7886
FIX: Improve failover for multisite clusters ( #11150 )
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- Bump rails_failover for new per-backend callback feature
- If the master backend fails over, make all sites readonly. And vice-versa for fallback
- If a single backend fails over, make that individual site readonly. And vice-versa for fallback
- When a single backend fails, also check connection to the master backend
2020-11-11 10:27:24 +00:00
ce686a008f
DEV: Refresh site settings on Redis fallback ( #10700 )
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This ensures that all app instances have up-to-date data, even if they missed a message-bus update during the failover
2020-09-18 11:44:25 +01:00
d83d9ec408
DEV: Clear all `DistributedCache` on Redis fallback.
2020-09-18 11:31:49 +08:00
23778f4bfd
DEV: Avoid logging Redis cannot connect error during failover.
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Reduce amount of noise in our logs.
2020-07-21 14:53:46 +08:00
df66a559c9
DEV: Pause Sidekiq before readonly mode during PG failover.
2020-07-21 13:51:37 +08:00
031a6616a3
DEV: Allow writes to PG even if Redis is readonly mode.
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Previously, I thought it was better to drop the site into reading mode
when Redis has failed over to the replica but it created more errors
while Redis is in readonly mode since ActiveRecord would prevent us from
writing to PG even though PG is up.
2020-07-21 12:34:07 +08:00
383537a2fa
DEV: Force ActiveRecord reading role on Redis failover take 2.
2020-07-20 16:11:20 +08:00
5adf2ccaca
DEV: Force ActiveRecord reading role on Redis failover.
2020-07-20 15:10:53 +08:00
54d002f7db
DEV: Fix error introduced in d5c56a846.
2020-07-13 10:13:37 +08:00
d5c56a846a
DEV: Only failover the entire cluster when the default db goes down.
2020-07-09 11:49:03 +08:00
fd38c2fac3
FIX: Force ActiveRecord reading role if Redis is down take 2.
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follow-up f03c7a1ba1
2020-07-09 11:14:19 +08:00
f03c7a1ba1
FIX: Force ActiveRecord reading role if Redis is down.
2020-07-09 11:13:02 +08:00
2c4c953bf8
DEV: Avoid logging errors on bad Redis connection during PG failover.
2020-06-29 11:54:55 +08:00
c611f3703c
DEV: Don't use logster when logging in Redis failover.
2020-06-16 11:53:52 +08:00
b08a0d15c4
DEV: Fix undefined method due to rails_failover.
2020-06-16 11:03:57 +08:00
092ae858af
DEV: Bump rails_failover.
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Avoid configuring AR stuff if `replica_host` and `replica_port` hasn't
been provided.
2020-06-16 10:51:21 +08:00
402b80f306
DEV: Make rails_failover compatible with `SKIP_DB_AND_REDIS` env.
2020-06-15 16:23:24 +08:00
e0d798c06c
DEV: Fix undefined method.
2020-06-15 16:04:41 +08:00
e0fdf41537
DEV: Don't configure rails_failover is db and redis is skipped.
2020-06-15 15:56:57 +08:00
58e52c0e4f
DEV: Use rails_failover gem for ActiveRecord and Redis failover handling
2020-06-15 15:47:07 +08:00
0ff86b00cb
DEV: Upgrade Redis to 4.2.1.
2020-06-15 10:05:22 +08:00
78b5ab746c
DEV: No longer need to clear anon cache when toggling readonly mode.
2020-06-12 09:58:17 +08:00
dc4071dfef
DEV: Use `Rails.logger` instead of logster for rails_failover callbacks
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`Discourse.warn_exception` logs to logger by default but it means we
lose all the backtrace when the logs are written to the log file.
2020-06-11 17:24:32 +08:00
1411b095eb
DEV: Rescue errors when runngin AR failover/fallback callbacks.
2020-06-11 13:02:42 +08:00
34ee1f2e71
DEV: Fix undefined method in rails_failover initializer.
2020-06-11 12:30:01 +08:00
cbb4ea1ea8
DEV: Don't blow up request redis can't be reached during failover.
2020-06-11 11:41:06 +08:00
a3dfd553a1
Revert "Bump redis to 4.2.0."
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This reverts commit 98bc28cea2
2020-06-10 14:52:05 +08:00
98bc28cea2
Bump redis to 4.2.0.
2020-06-10 14:28:56 +08:00
2ce829cc01
DEV: Allow multisite apps to boot with reading connection handler.
2020-06-10 14:18:29 +08:00
a1c13eb3c6
DEV: Redis failover should only clear redis recently readonly.
2020-06-09 16:36:31 +08:00
f6628e4f43
DEV: Disable messageBus keepalive when Redis fails over.
2020-06-08 12:33:08 +08:00
54f79ea3ba
DEV: Pausing Sidekiq is multisite aware.
2020-06-04 15:46:30 +08:00
8e1681d356
Bump rails_failover.
2020-06-04 15:22:35 +08:00
439db7ca1e
DEV: Add `REDIS_RAILS_FAILOVER` env to test our new redis failover.
2020-06-02 17:24:14 +08:00
ade60b0cbc
DEV: Enable readonly mode for all multisite sites when PG goes down.
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The risk here is that the database for one site goes down in the multisite setup and we drop everything to readonly mode. However, I discussed this with Sam and we agree that one database having problem is very rare. Most of the time, it is the entire DB cluster that goes down.
2020-06-02 11:32:07 +08:00
326d6d5b0f
DEV: Pause Sidekiq when forcing pg readonly mode.
2020-06-02 09:20:03 +08:00
32735be5bd
DEV: Fix publish to message_bus when forcing pg readonly.
2020-06-01 13:26:12 +08:00
2c3ff3e524
DEV: Missing readonly mode banner when forcing PG readonly.
2020-06-01 12:25:27 +08:00
b0b37bf5a3
DEV: Add force rails_over switch via Redis.
2020-06-01 11:23:58 +08:00
8c86a109bb
DEV: Add ENV flag to test out `ActiveRecord::Failover`.
2020-05-28 16:24:22 +08:00
David Taylor
Guo Xiang Tan
Guo Xiang Tan