David Taylor
5406e24acb
FEATURE: Introduce pg_force_readonly_mode GlobalSetting ( #19612 )
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This allows the entire cluster to be forced into pg readonly mode. Equivalent to running `Discourse.enable_pg_force_readonly_mode` on the console.
2023-01-19 13:59:11 +00:00
David Taylor
7c77cc6a58
DEV: Apply syntax_tree formatting to config/*
2023-01-09 11:13:29 +00:00
Loïc Guitaut
008b700a3f
DEV: Upgrade to Rails 7
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This patch upgrades Rails to version 7.0.2.4.
2022-04-28 11:51:03 +02:00
David Taylor
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
David Taylor
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
Guo Xiang Tan
d83d9ec408
DEV: Clear all DistributedCache on Redis fallback.
2020-09-18 11:31:49 +08:00
Guo Xiang Tan
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
Guo Xiang Tan
df66a559c9
DEV: Pause Sidekiq before readonly mode during PG failover.
2020-07-21 13:51:37 +08:00
Guo Xiang Tan
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
Guo Xiang Tan
383537a2fa
DEV: Force ActiveRecord reading role on Redis failover take 2.
2020-07-20 16:11:20 +08:00
Guo Xiang Tan
5adf2ccaca
DEV: Force ActiveRecord reading role on Redis failover.
2020-07-20 15:10:53 +08:00
Guo Xiang Tan
54d002f7db
DEV: Fix error introduced in d5c56a846.
2020-07-13 10:13:37 +08:00
Guo Xiang Tan
d5c56a846a
DEV: Only failover the entire cluster when the default db goes down.
2020-07-09 11:49:03 +08:00
Guo Xiang Tan
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
Guo Xiang Tan
f03c7a1ba1
FIX: Force ActiveRecord reading role if Redis is down.
2020-07-09 11:13:02 +08:00
Guo Xiang Tan
2c4c953bf8
DEV: Avoid logging errors on bad Redis connection during PG failover.
2020-06-29 11:54:55 +08:00
Guo Xiang Tan
c611f3703c
DEV: Don't use logster when logging in Redis failover.
2020-06-16 11:53:52 +08:00
Guo Xiang Tan
b08a0d15c4
DEV: Fix undefined method due to rails_failover.
2020-06-16 11:03:57 +08:00
Guo Xiang Tan
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
Guo Xiang Tan
402b80f306
DEV: Make rails_failover compatible with SKIP_DB_AND_REDIS env.
2020-06-15 16:23:24 +08:00
Guo Xiang Tan
e0d798c06c
DEV: Fix undefined method.
2020-06-15 16:04:41 +08:00
Guo Xiang Tan
e0fdf41537
DEV: Don't configure rails_failover is db and redis is skipped.
2020-06-15 15:56:57 +08:00
Guo Xiang Tan
58e52c0e4f
DEV: Use rails_failover gem for ActiveRecord and Redis failover handling
2020-06-15 15:47:07 +08:00
Guo Xiang Tan
0ff86b00cb
DEV: Upgrade Redis to 4.2.1.
2020-06-15 10:05:22 +08:00
Guo Xiang Tan
78b5ab746c
DEV: No longer need to clear anon cache when toggling readonly mode.
2020-06-12 09:58:17 +08:00
Guo Xiang Tan
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
Guo Xiang Tan
1411b095eb
DEV: Rescue errors when runngin AR failover/fallback callbacks.
2020-06-11 13:02:42 +08:00
Guo Xiang Tan
34ee1f2e71
DEV: Fix undefined method in rails_failover initializer.
2020-06-11 12:30:01 +08:00
Guo Xiang Tan
cbb4ea1ea8
DEV: Don't blow up request redis can't be reached during failover.
2020-06-11 11:41:06 +08:00
Guo Xiang Tan
a3dfd553a1
Revert "Bump redis to 4.2.0."
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This reverts commit 98bc28cea2
2020-06-10 14:52:05 +08:00
Guo Xiang Tan
98bc28cea2
Bump redis to 4.2.0.
2020-06-10 14:28:56 +08:00
Guo Xiang Tan
2ce829cc01
DEV: Allow multisite apps to boot with reading connection handler.
2020-06-10 14:18:29 +08:00
Guo Xiang Tan
a1c13eb3c6
DEV: Redis failover should only clear redis recently readonly.
2020-06-09 16:36:31 +08:00
Guo Xiang Tan
f6628e4f43
DEV: Disable messageBus keepalive when Redis fails over.
2020-06-08 12:33:08 +08:00
Guo Xiang Tan
54f79ea3ba
DEV: Pausing Sidekiq is multisite aware.
2020-06-04 15:46:30 +08:00
Guo Xiang Tan
8e1681d356
Bump rails_failover.
2020-06-04 15:22:35 +08:00
Guo Xiang Tan
439db7ca1e
DEV: Add REDIS_RAILS_FAILOVER env to test our new redis failover.
2020-06-02 17:24:14 +08:00
Guo Xiang Tan
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
Guo Xiang Tan
326d6d5b0f
DEV: Pause Sidekiq when forcing pg readonly mode.
2020-06-02 09:20:03 +08:00
Guo Xiang Tan
32735be5bd
DEV: Fix publish to message_bus when forcing pg readonly.
2020-06-01 13:26:12 +08:00
Guo Xiang Tan
2c3ff3e524
DEV: Missing readonly mode banner when forcing PG readonly.
2020-06-01 12:25:27 +08:00
Guo Xiang Tan
b0b37bf5a3
DEV: Add force rails_over switch via Redis.
2020-06-01 11:23:58 +08:00
Guo Xiang Tan
8c86a109bb
DEV: Add ENV flag to test out ActiveRecord::Failover.
2020-05-28 16:24:22 +08:00
