【发布时间】：2022-06-16 05:30:03
【问题描述】：
我正在尝试设置一个具有 3 个 redis 服务器（1 个主服务器和 2 个副本）和 3 个 redis 哨兵的 redis 复制集群。 一台机器上将存在一个服务器和数据库对，并且将有 3 台机器，每台机器都安装了 docker。 我遇到的问题是 redis 服务器实例无法连接到 MASTER 并解析主名称。 网络或端口开放似乎没有问题，因为我可以在 如下配置，通信按预期工作。
Redis 版本在日志中进一步向下
docker-compose version 1.29.2, build 5becea4c
Docker version 20.10.14, build a224086
Ubuntu 20.04.4 LTS
以下是 docker-compose.yml 文件：
我没有包含 redis_3 配置和输出，因为它与 redis_2 几乎相同
初级：
version: '3.8'
services:
redis_1:
image: bitnami/redis:6.2
restart: always
command: ["redis-server", "--protected-mode", "no", "--dir", "/data"]
environment:
- REDIS_REPLICA_IP=redis_1
- REDIS_REPLICATION_MODE=master
- REDIS_MASTER_PASSWORD=very-good-password
- REDIS_PASSWORD=very-good-password
ports:
- "6379:6379"
volumes:
- "/opt/knowit/docker/data:/data"
sentinel_1:
image: bitnami/redis-sentinel:6.2
restart: always
environment:
- REDIS_MASTER_HOST=redis_1
- REDIS_MASTER_PASSWORD=very-good-password
- REDIS_SENTINEL_ANNOUNCE_IP=redis_1
- REDIS_SENTINEL_QUORUM=2
- REDIS_SENTINEL_DOWN_AFTER_MILLISECONDS=5000
- REDIS_SENTINEL_FAILOVER_TIMEOUT=60000
- REDIS_SENTINEL_PASSWORD=other-good-password
- REDIS_SENTINEL_ANNOUNCE_HOSTNAMES=yes
- REDIS_SENTINEL_RESOLVE_HOSTNAMES=yes
ports:
- "26379:26379"
副本：
version: '3.8'
services:
redis_2:
image: bitnami/redis:6.2
restart: always
command: ["redis-server", "--protected-mode", "no", "--replicaof", "redis_1", "6379", "--dir", "/data"]
environment:
- REDIS_REPLICA_IP=redis_2
- REDIS_REPLICATION_MODE=replica
- REDIS_MASTER_PASSWORD=very-good-password
- REDIS_PASSWORD=very-good-password
ports:
- "6379:6379"
volumes:
- "/opt/knowit/docker/data:/data"
sentinel_2:
image: bitnami/redis-sentinel:6.2
restart: always
environment:
- REDIS_MASTER_HOST=redis_1
- REDIS_MASTER_PASSWORD=very-good-password
- REDIS_SENTINEL_ANNOUNCE_IP=redis_2
- REDIS_SENTINEL_QUORUM=2
- REDIS_SENTINEL_DOWN_AFTER_MILLISECONDS=5000
- REDIS_SENTINEL_FAILOVER_TIMEOUT=60000
- REDIS_SENTINEL_PASSWORD=other-good-password
- REDIS_SENTINEL_ANNOUNCE_HOSTNAMES=yes
- REDIS_SENTINEL_RESOLVE_HOSTNAMES=yes
ports:
- "26379:26379"
docker 日志如下所示：
初级：
$ sudo docker-compose up
Starting docker_redis_1 ... done
Starting docker_sentinel_1 ... done
Attaching to docker_redis_1, docker_sentinel_1
redis_1 | redis 12:15:41.03
redis_1 | redis 12:15:41.04 Welcome to the Bitnami redis container
redis_1 | redis 12:15:41.04 Subscribe to project updates by watching https://github.com/bitnami/bitnami-docker-redis
redis_1 | redis 12:15:41.04 Submit issues and feature requests at https://github.com/bitnami/bitnami-docker-redis/issues
redis_1 |
redis_1 | redis 12:15:41.04
redis_1 | 1:C 29 Apr 2022 12:15:41.068 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
redis_1 | 1:C 29 Apr 2022 12:15:41.069 # Redis version=6.2.7, bits=64, commit=00000000, modified=0, pid=1, just started
redis_1 | 1:C 29 Apr 2022 12:15:41.069 # Configuration loaded
redis_1 | 1:M 29 Apr 2022 12:15:41.070 * monotonic clock: POSIX clock_gettime
redis_1 | 1:M 29 Apr 2022 12:15:41.072 # A key '__redis__compare_helper' was added to Lua globals which is not on the globals allow list nor listed on the deny list.
redis_1 | 1:M 29 Apr 2022 12:15:41.072 * Running mode=standalone, port=6379.
redis_1 | 1:M 29 Apr 2022 12:15:41.072 # Server initialized
redis_1 | 1:M 29 Apr 2022 12:15:41.073 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
redis_1 | 1:M 29 Apr 2022 12:15:41.073 * Ready to accept connections
sentinel_1 | redis-sentinel 12:15:41.08
sentinel_1 | redis-sentinel 12:15:41.08 Welcome to the Bitnami redis-sentinel container
sentinel_1 | redis-sentinel 12:15:41.08 Subscribe to project updates by watching https://github.com/bitnami/bitnami-docker-redis-sentinel
sentinel_1 | redis-sentinel 12:15:41.08 Submit issues and feature requests at https://github.com/bitnami/bitnami-docker-redis-sentinel/issues
sentinel_1 | redis-sentinel 12:15:41.08
sentinel_1 | redis-sentinel 12:15:41.08 INFO ==> ** Starting Redis sentinel setup **
sentinel_1 | redis-sentinel 12:15:41.11 INFO ==> Initializing Redis Sentinel...
sentinel_1 | redis-sentinel 12:15:41.11 INFO ==> Persisted files detected, restoring...
sentinel_1 | redis-sentinel 12:15:41.12 INFO ==> ** Redis sentinel setup finished! **
sentinel_1 |
sentinel_1 | redis-sentinel 12:15:41.13 INFO ==> ** Starting Redis Sentinel **
sentinel_1 | 1:X 29 Apr 2022 12:15:41.143 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
sentinel_1 | 1:X 29 Apr 2022 12:15:41.144 # Redis version=6.2.7, bits=64, commit=00000000, modified=0, pid=1, just started
sentinel_1 | 1:X 29 Apr 2022 12:15:41.144 # Configuration loaded
sentinel_1 | 1:X 29 Apr 2022 12:15:41.145 * monotonic clock: POSIX clock_gettime
sentinel_1 | 1:X 29 Apr 2022 12:15:41.146 # A key '__redis__compare_helper' was added to Lua globals which is not on the globals allow list nor listed on the deny list.
sentinel_1 | 1:X 29 Apr 2022 12:15:41.147 * Running mode=sentinel, port=26379.
sentinel_1 | 1:X 29 Apr 2022 12:15:41.148 # Sentinel ID is 232f6b838b76c348f123597f2852091a77bdae03
sentinel_1 | 1:X 29 Apr 2022 12:15:41.148 # +monitor master mymaster redis_1 6379 quorum 2
副本：
$ sudo docker-compose up
Starting docker_redis_2 ... done
Starting docker_sentinel_2 ... done
Attaching to docker_redis_2, docker_sentinel_2
redis_2 | redis 11:53:24.61
redis_2 | redis 11:53:24.62 Welcome to the Bitnami redis container
redis_2 | redis 11:53:24.63 Subscribe to project updates by watching https://github.com/bitnami/bitnami-docker-redis
redis_2 | redis 11:53:24.63 Submit issues and feature requests at https://github.com/bitnami/bitnami-docker-redis/issues
redis_2 | redis 11:53:24.63
redis_2 |
redis_2 | 1:C 29 Apr 2022 11:53:24.649 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
redis_2 | 1:C 29 Apr 2022 11:53:24.651 # Redis version=6.2.7, bits=64, commit=00000000, modified=0, pid=1, just started
redis_2 | 1:C 29 Apr 2022 11:53:24.651 # Configuration loaded
redis_2 | 1:S 29 Apr 2022 11:53:24.653 * monotonic clock: POSIX clock_gettime
redis_2 | 1:S 29 Apr 2022 11:53:24.656 # A key '__redis__compare_helper' was added to Lua globals which is not on the globals allow list nor listed on the deny list.
redis_2 | 1:S 29 Apr 2022 11:53:24.657 * Running mode=standalone, port=6379.
redis_2 | 1:S 29 Apr 2022 11:53:24.657 # Server initialized
redis_2 | 1:S 29 Apr 2022 11:53:24.657 # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
redis_2 | 1:S 29 Apr 2022 11:53:24.659 * Ready to accept connections
redis_2 | 1:S 29 Apr 2022 11:53:24.659 * Connecting to MASTER redis_1:6379
sentinel_2 | redis-sentinel 11:53:24.70
sentinel_2 | redis-sentinel 11:53:24.71 Welcome to the Bitnami redis-sentinel container
sentinel_2 | redis-sentinel 11:53:24.71 Subscribe to project updates by watching https://github.com/bitnami/bitnami-docker-redis-sentinel
sentinel_2 | redis-sentinel 11:53:24.71 Submit issues and feature requests at https://github.com/bitnami/bitnami-docker-redis-sentinel/issues
sentinel_2 | redis-sentinel 11:53:24.71
sentinel_2 | redis-sentinel 11:53:24.71 INFO ==> ** Starting Redis sentinel setup **
redis_2 | 1:S 29 Apr 2022 11:53:34.673 # Unable to connect to MASTER: Resource temporarily unavailable
sentinel_2 | redis-sentinel 11:53:34.75 WARN ==> Hostname redis_1 could not be resolved, this could lead to connection issues
sentinel_2 | redis-sentinel 11:53:34.76 INFO ==> Initializing Redis Sentinel...
sentinel_2 | redis-sentinel 11:53:34.76 INFO ==> Persisted files detected, restoring...
sentinel_2 | redis-sentinel 11:53:34.77 INFO ==> ** Redis sentinel setup finished! **
sentinel_2 |
sentinel_2 | redis-sentinel 11:53:34.79 INFO ==> ** Starting Redis Sentinel **
redis_2 | 1:S 29 Apr 2022 11:53:35.675 * Connecting to MASTER redis_1:6379
sentinel_2 | 1:X 29 Apr 2022 11:53:44.813 # Failed to resolve hostname 'redis_1'
sentinel_2 | 1:X 29 Apr 2022 11:53:44.813 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
sentinel_2 | 1:X 29 Apr 2022 11:53:44.813 # Redis version=6.2.7, bits=64, commit=00000000, modified=0, pid=1, just started
sentinel_2 | 1:X 29 Apr 2022 11:53:44.813 # Configuration loaded
sentinel_2 | 1:X 29 Apr 2022 11:53:44.814 * monotonic clock: POSIX clock_gettime
sentinel_2 | 1:X 29 Apr 2022 11:53:44.815 # A key '__redis__compare_helper' was added to Lua globals which is not on the globals allow list nor listed on the deny list.
sentinel_2 | 1:X 29 Apr 2022 11:53:44.815 * Running mode=sentinel, port=26379.
sentinel_2 | 1:X 29 Apr 2022 11:53:44.816 # Sentinel ID is bfec501e81d8da33def75f23911b606aa395078d
sentinel_2 | 1:X 29 Apr 2022 11:53:44.816 # +monitor master mymaster redis_1 6379 quorum 2
sentinel_2 | 1:X 29 Apr 2022 11:53:44.817 # +tilt #tilt mode entered
redis_2 | 1:S 29 Apr 2022 11:53:45.687 # Unable to connect to MASTER: Resource temporarily unavailable
redis_2 | 1:S 29 Apr 2022 11:53:46.689 * Connecting to MASTER redis_1:6379
sentinel_2 | 1:X 29 Apr 2022 11:53:54.831 # Failed to resolve hostname 'redis_1'
sentinel_2 | 1:X 29 Apr 2022 11:53:54.914 # +tilt #tilt mode entered
redis_2 | 1:S 29 Apr 2022 11:53:56.701 # Unable to connect to MASTER: Resource temporarily unavailable
当不同的 redis 实例位于不同的机器上时，解析主机名是否存在一些问题，或者我只是错过了一些基本的东西？
我会假设后者，因为我已经能够通过指定 ip 地址来启动并运行它，并且副本也接收到主服务器的主机名。
任何帮助将不胜感激！如果需要其他信息，请告诉我
【问题讨论】：
标签： docker-compose redis bitnami hostname resolve