原作者：盖国强

目 录

• 适用范围
• 问题概述
• 问题原因
• 解决方案

适用范围

运行环境为 MacOS，M1 处理器。

问题概述

基于容器的数据库部署已经成为常态，云和恩墨的 MogDB 同样推出了 MogDB Stack 容器版本。我的个人测试也是基于 Docker 的部署。

遭遇到重新启动容器，无法启动的问题。

Docker 的启动日志如下：

MogDB Database directory appears to contain a database; Skipping initialization

2023-03-07 12:17:24.989 [BACKEND] WARNING:  could not create any HA TCP/IP sockets
2023-03-07 12:17:24.992 [BACKEND] WARNING:  No explicit IP is configured for listen_addresses GUC.
2023-03-07 12:17:24.992 [BACKEND] LOG:  InitNuma numaNodeNum: 1 numa_distribute_mode: none inheritThreadPool: 0.
2023-03-07 12:17:24.992 [BACKEND] LOG:  reserved memory for backend threads is: 220 MB
2023-03-07 12:17:24.992 [BACKEND] LOG:  reserved memory for WAL buffers is: 128 MB
2023-03-07 12:17:24.992 [BACKEND] LOG:  Set max backend reserve memory is: 348 MB, max dynamic memory is: 11027 MB
2023-03-07 12:17:24.992 [BACKEND] LOG:  shared memory 400 Mbytes, memory context 11375 Mbytes, max process memory 12288 Mbytes
2023-03-07 12:17:25.020 [CACHE] LOG:  set data cache  size(402653184)
2023-03-07 12:17:25.029 [CACHE] LOG:  set metadata cache  size(134217728)
2023-03-07 12:17:25.050 [SEGMENT_PAGE] LOG:  Segment-page constants: DF_MAP_SIZE: 8156, DF_MAP_BIT_CNT: 65248, DF_MAP_GROUP_EXTENTS: 4175872, IPBLOCK_SIZE: 8168, EXTENTS_PER_IPBLOCK: 1021, IPBLOCK_GROUP_SIZE: 4090, BMT_HEADER_LEVEL0_TOTAL_PAGES: 8323072, BktMapEntryNumberPerBlock: 2038, BktMapBlockNumber: 25, BktBitMaxMapCnt: 512
2023-03-07 12:17:25.062 [BACKEND] LOG:  mogdb: fsync file "/var/lib/mogdb/data/gaussdb.state.temp" success
2023-03-07 12:17:25.062 [BACKEND] LOG:  create gaussdb state file success: db state(STARTING_STATE), server mode(Normal), connection index(1)
2023-03-07 12:17:25.079 [BACKEND] LOG:  max_safe_fds = 980, usable_fds = 1000, already_open = 10
2023-03-07 12:17:25.081 [BACKEND] WARNING:  Cgroup initialization failed: Cgroup is not mounted
2023-03-07 12:17:25.089 [EXECUTOR] WARNING:  Failed to obtain environment value $GAUSSLOG!
2023-03-07 12:17:25.089 [EXECUTOR] DETAIL:  N/A
2023-03-07 12:17:25.089 [EXECUTOR] CAUSE:  Incorrect environment value.
2023-03-07 12:17:25.089 [EXECUTOR] ACTION:  Please refer to backend log for more details.
2023-03-07 12:17:25.089 [EXECUTOR] WARNING:  Failed to obtain environment value $GAUSSLOG!
2023-03-07 12:17:25.089 [EXECUTOR] DETAIL:  N/A
2023-03-07 12:17:25.089 [EXECUTOR] CAUSE:  Incorrect environment value.
2023-03-07 12:17:25.089 [EXECUTOR] ACTION:  Please refer to backend log for more details.

也可以通过命令,将指定容器的日志输出到文件：

docker logs 876c51460fa2 > 876c51460fa2.log

容器标识可以如下获取：

docker ps -a

通过对比，以上日志和正常启动日志无差异。并且没有特别的指向性问题。

问题原因

请求二线支持，MogDB Stack 的研发给出一个重要指引。通过类似如下命令，测试启动一个新的容器：

docker run --name MogDB --privileged=true -d -e GS_PASSWORD=Enmo@123 swr.cn-north-4.myhuaweicloud.com/mogdb/mogdb:latest

这个步骤同样失败了。

但是此时，日志出现如下信息：

The database cluster will be initialized with locale "C".
The default text search configuration will be set to "english".

fixing permissions on existing directory /var/lib/mogdb/data ... ok
creating subdirectories ... gs_initdb: removing contents of data directory "/var/lib/mogdb/data"
gs_initdb: could not create directory "/var/lib/mogdb/data/global": No space left on device

系统提示：空间不足。

检查 Docker DeskTop 信息，原有容器的确空间耗尽，59.4GB 空间使用接近 100%：

解决方案

对空间进行扩容：

此后，数据库成功启动。

MogDB 是云和恩墨基于opengauss 企业级数据库