Decided to help out some folks at meta regarding using unix domain dockets for Redis, so I worked on this new Discourse configuration and got it working and tested today:
PR:
1 Like
Implementation Notes:
-
If concerned about security of the Redis DB on the host, there is no need to expose this unix socket in the shared volume.
-
If you wish to set the permissions of the unix socket to 770 (instead of 777) , change the group of the unix socket to www-data. (Having some issues with pups and chgrp in the yml templates)
One of the cool things we can do with Redis running on a unix socket which is shared outside the Discourse docker container is to monitor Redis is real-time:
# cd /var/discourse
# redis-cli -s ./shared/standalone/tmp/redis.sock monitor
This gives us a real-time monitor of Redis, like this example output:
Here is another cool thing to do from the cli:
redis ./shared/standalone/tmp/redis.sock> info
# Server
redis_version:5.0.5
redis_git_sha1:00000000
redis_git_dirty:0
redis_build_id:df6b74e5e33d6955
redis_mode:standalone
os:Linux 5.4.0-26-generic x86_64
arch_bits:64
multiplexing_api:epoll
atomicvar_api:atomic-builtin
gcc_version:8.3.0
process_id:638
run_id:467389fb2e1df851e86a92da9e4d3958e75e66ac
tcp_port:0
uptime_in_seconds:7101
uptime_in_days:0
hz:10
configured_hz:10
lru_clock:14454625
executable:/usr/bin/redis-server
config_file:/etc/redis/redis.conf
# Clients
connected_clients:34
client_recent_max_input_buffer:4
client_recent_max_output_buffer:0
blocked_clients:5
# Memory
used_memory:6689184
used_memory_human:6.38M
used_memory_rss:9900032
used_memory_rss_human:9.44M
used_memory_peak:6892416
used_memory_peak_human:6.57M
used_memory_peak_perc:97.05%
used_memory_overhead:1537690
used_memory_startup:792336
used_memory_dataset:5151494
used_memory_dataset_perc:87.36%
allocator_allocated:6747448
allocator_active:7372800
allocator_resident:10338304
total_system_memory:2084278272
total_system_memory_human:1.94G
used_memory_lua:50176
used_memory_lua_human:49.00K
used_memory_scripts:2448
used_memory_scripts_human:2.39K
number_of_cached_scripts:4
maxmemory:0
maxmemory_human:0B
maxmemory_policy:noeviction
allocator_frag_ratio:1.09
allocator_frag_bytes:625352
allocator_rss_ratio:1.40
allocator_rss_bytes:2965504
rss_overhead_ratio:0.96
rss_overhead_bytes:-438272
mem_fragmentation_ratio:1.48
mem_fragmentation_bytes:3211888
mem_not_counted_for_evict:0
mem_replication_backlog:0
mem_clients_slaves:0
mem_clients_normal:706442
mem_aof_buffer:0
mem_allocator:jemalloc-5.1.0
active_defrag_running:0
lazyfree_pending_objects:0
# Persistence
loading:0
rdb_changes_since_last_save:1143
rdb_bgsave_in_progress:0
rdb_last_save_time:1591512751
rdb_last_bgsave_status:ok
rdb_last_bgsave_time_sec:0
rdb_current_bgsave_time_sec:-1
rdb_last_cow_size:1146880
aof_enabled:0
aof_rewrite_in_progress:0
aof_rewrite_scheduled:0
aof_last_rewrite_time_sec:-1
aof_current_rewrite_time_sec:-1
aof_last_bgrewrite_status:ok
aof_last_write_status:ok
aof_last_cow_size:0
# Stats
total_connections_received:51
total_commands_processed:113693
instantaneous_ops_per_sec:20
total_net_input_bytes:9061485
total_net_output_bytes:3774761
instantaneous_input_kbps:1.57
instantaneous_output_kbps:0.22
rejected_connections:0
sync_full:0
sync_partial_ok:0
sync_partial_err:0
expired_keys:30
expired_stale_perc:0.00
expired_time_cap_reached_count:0
evicted_keys:0
keyspace_hits:21194
keyspace_misses:17998
pubsub_channels:1
pubsub_patterns:0
latest_fork_usec:350
migrate_cached_sockets:0
slave_expires_tracked_keys:0
active_defrag_hits:0
active_defrag_misses:0
active_defrag_key_hits:0
active_defrag_key_misses:0
# Replication
role:master
connected_slaves:0
master_replid:0bdf07d113717cc3525b26db2410abf534f6f40d
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:0
second_repl_offset:-1
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0
# CPU
used_cpu_sys:11.041099
used_cpu_user:10.522004
used_cpu_sys_children:0.138786
used_cpu_user_children:0.794560
# Cluster
cluster_enabled:0
# Keyspace
db0:keys=504,expires=338,avg_ttl=13106507625
redis ./shared/standalone/tmp/redis.sock>
This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.