我有一个Rails应用，我想对它进行docker化。我使用Digital Ocean，并且安装了Docker（18.09.4）和docker compose（1.18.0）。我的docker-compose.yml文件如下所示：
version: '2'
services:
app:
build:
context: .
dockerfile: ./docker/app/Dockerfile
depends_on:
- db
- redis
command: bundle exec puma -C config/puma.rb
expose:
- 3000
env_file: .env
volumes:
- .:/app
- /home/deploy/apps/myapp/shared/public/assets:/var/www/myapp/public/assets
cron:
build:
context: .
dockerfile: ./docker/app/Dockerfile
command: bash -c 'bundle exec whenever -i && cron -f'
depends_on:
- db
- redis
volumes:
- .:/app
env_file: .env
db:
image: postgres
volumes:
- postgres_data:/var/lib/postgresql/data
env_file: .env
redis:
image: redis:4.0.14
command: redis-server --appendonly yes
ports:
- 6379:6379
volumes:
- redis_data:/data
sidekiq_default:
depends_on:
- db
- redis
build:
context: .
dockerfile: ./docker/app/Dockerfile
command: bundle exec sidekiq -C config/sidekiq_default.yml
volumes:
- .:/app
env_file: .env
sidekiq_import:
depends_on:
- db
- redis
build:
context: .
dockerfile: ./docker/app/Dockerfile
command: bundle exec sidekiq -C config/sidekiq_import.yml
volumes:
- .:/app
env_file: .env
web:
build:
context: .
dockerfile: ./docker/web/Dockerfile
depends_on:
- app
command: nginx -g 'daemon off;'
ports:
- 80:80
volumes:
postgres_data:
redis_data:
出什么问题了？看着Sidekiq UI，我会不时失去工作。返回redis.set("foo", "bar")后的第二天，我什至做了nil。即使容器的状态为例如，看起来容器仍在重新启动。 up X days。当我查看日志时，得到以下输出：
25229:C 18 May 21:15:52.497 # Opening the temp file for AOF rewrite in rewriteAppendOnlyFile(): Permission denied
1:M 18 May 21:15:52.597 # Background AOF rewrite terminated with error
1:M 18 May 21:15:52.697 * Starting automatic rewriting of AOF on 119964390% growth
1:M 18 May 21:15:52.697 * Background append only file rewriting started by pid 25230
25230:C 18 May 21:15:52.698 # Opening the temp file for AOF rewrite in rewriteAppendOnlyFile(): Permission denied
1:M 18 May 21:15:52.798 # Background AOF rewrite terminated with error
1:M 18 May 21:15:52.898 * Starting automatic rewriting of AOF on 119964390% growth
1:M 18 May 21:15:52.898 * Background append only file rewriting started by pid 25231
25231:C 18 May 21:15:52.899 # Opening the temp file for AOF rewrite in rewriteAppendOnlyFile(): Permission denied
1:M 18 May 21:15:52.999 # Background AOF rewrite terminated with error
1:signal-handler (1558214153) Received SIGTERM scheduling shutdown...
1:M 18 May 21:15:53.099 # User requested shutdown...
1:M 18 May 21:15:53.099 * Calling fsync() on the AOF file.
1:M 18 May 21:15:53.099 # Redis is now ready to exit, bye bye...
1:C 18 May 21:15:57.373 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:C 18 May 21:15:57.373 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=1, just started
1:C 18 May 21:15:57.373 # Configuration loaded
1:M 18 May 21:15:57.378 * Running mode=standalone, port=6379.
1:M 18 May 21:15:57.379 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:M 18 May 21:15:57.379 # Server initialized
1:M 18 May 21:15:57.379 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
1:M 18 May 21:16:36.388 * DB loaded from append only file: 39.008 seconds
1:M 18 May 21:16:36.389 * Ready to accept connections
1:M 18 May 22:58:03.031 * Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.
1:M 18 May 22:59:43.054 * Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.
1:M 18 May 23:01:37.063 * Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.
1:M 18 May 23:10:19.038 * Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.
1:M 18 May 23:13:17.090 * Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.
1:M 18 May 23:16:09.021 * Asynchronous AOF fsync is taking too long (disk is busy?). Writing the AOF buffer without waiting for fsync to complete, this may slow down Redis.
1:M 19 May 03:25:37.328 * DB saved on disk
1:M 19 May 03:25:37.337 * DB saved on disk
因此，它表示AOF存在问题。我该如何解决？ docker-compose配置有什么问题吗？
编辑： 我重新启动了容器，并一直在查看日志和作业。一段时间后，作业又消失了，并且容器日志中没有任何内容：
1:C 19 May 12:29:46.531 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:C 19 May 12:29:46.532 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=1, just started
1:C 19 May 12:29:46.532 # Configuration loaded
1:M 19 May 12:29:46.538 * Running mode=standalone, port=6379.
1:M 19 May 12:29:46.539 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:M 19 May 12:29:46.539 # Server initialized
1:M 19 May 12:29:46.539 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
1:M 19 May 12:30:56.916 * DB loaded from append only file: 70.377 seconds
1:M 19 May 12:30:56.917 * Ready to accept connections
1:M 19 May 13:44:02.620 * DB saved on disk
1:M 19 May 13:44:02.625 * DB saved on disk
1:signal-handler (1558274030) Received SIGTERM scheduling shutdown...
1:M 19 May 13:53:50.487 # User requested shutdown...
1:M 19 May 13:53:50.487 * Calling fsync() on the AOF file.
1:M 19 May 13:53:50.487 # Redis is now ready to exit, bye bye...
1:C 19 May 13:53:51.422 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
1:C 19 May 13:53:51.422 # Redis version=4.0.14, bits=64, commit=00000000, modified=0, pid=1, just started
1:C 19 May 13:53:51.422 # Configuration loaded
1:M 19 May 13:53:51.424 * Running mode=standalone, port=6379.
1:M 19 May 13:53:51.424 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
1:M 19 May 13:53:51.424 # Server initialized
1:M 19 May 13:53:51.424 # WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' as root, and add it to your /etc/rc.local in order to retain the setting after a reboot. Redis must be restarted after THP is disabled.
1:M 19 May 13:54:35.554 * DB loaded from append only file: 44.130 seconds
1:M 19 May 13:54:35.554 * Ready to accept connections