1 系统版本和docker 版本信息

[root@db02 ~#]cat /etc/redhat-release
CentOS Linux release 7.8.2003 (Core)
[root@db02 ~#]docker version
Client:
Version: 1.12.6
API version: 1.24
Package version: docker-1.12.6-32.git88a4867.el7.centos.x86_64
Go version: go1.7.4
Git commit: 88a4867/1.12.6
Built: Mon Jul 3 16:02:02 2017
OS/Arch: linux/amd64

Server:
Version: 1.12.6
API version: 1.24
Package version: docker-1.12.6-32.git88a4867.el7.centos.x86_64
Go version: go1.7.4
Git commit: 88a4867/1.12.6
Built: Mon Jul 3 16:02:02 2017
OS/Arch: linux/amd64

2 系统内存不低于10G，否则observer启动报错！！

[root@db01 ~]# docker exec -it oceanbase-ce bash
[admin@72fc9534d496 ~]$ obd cluster list
+------------------------------------------------------------+
| Cluster List |
+--------+---------------------------------+-----------------+
| Name | Configuration Path | Status (Cached) |
+--------+---------------------------------+-----------------+
| obdemo | /home/admin/.obd/cluster/obdemo | deployed |
+--------+---------------------------------+-----------------+
[admin@72fc9534d496 ~]$ obd cluster start obdemo
Get local repositories and plugins ok
Open ssh connection ok
Cluster param config check ok
Check before start observer x
[WARN] (127.0.0.1) The recommended value of fs.aio-max-nr is 1048576 (Current value: 65536)
[ERROR] (127.0.0.1) not enough memory. (Free: 1.3G, Need: 8.0G)
Check before start obproxy ok

3 镜像下载