作者：Sally

openGauss是一款开源关系型数据库管理系统，采用木兰宽松许可证v2发行。openGauss内核早期源自PostgreSQL，深度融合华为在数据库领域多年的经验，结合企业级场景需求，持续构建竞争力特性。同时openGauss也是一个开源、免费的数据库平台，鼓励社区贡献、合作。

今天无意看到恩墨开源团队发布了openGauss新的容器镜像，此版本镜像还支持创建主从复制的openGauss高可用集群。

本篇文件记录快速部署的主从复制的openGauss高可用集群的过程以及中间遇到的问题，希望对学习openGauss的同学有所帮助。
参考dockerhub网址：https://hub.docker.com/r/enmotech/opengauss

基础环境准备

[root@hhj ~]# cat /etc/system-release
Oracle Linux Server release 7.9
[root@hhj ~]# docker info
Client:Context:    defaultDebug Mode: falsePlugins:app: Docker App (Docker Inc., v0.9.1-beta3)buildx: Build with BuildKit (Docker Inc., v0.5.1-docker)scan: Docker Scan (Docker Inc., v0.8.0)Server:Containers: 48Running: 0Paused: 0Stopped: 48Images: 18Server Version: 20.10.7Storage Driver: overlay2Backing Filesystem: xfsSupports d_type: trueNative Overlay Diff: falseuserxattr: falseLogging Driver: json-fileCgroup Driver: cgroupfsCgroup Version: 1Plugins:Volume: localNetwork: bridge host ipvlan macvlan null overlayLog: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslogSwarm: inactiveRuntimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux runcDefault Runtime: runcInit Binary: docker-initcontainerd version: d71fcd7d8303cbf684402823e425e9dd2e99285drunc version: b9ee9c6314599f1b4a7f497e1f1f856fe433d3b7init version: de40ad0Security Options:seccompProfile: defaultKernel Version: 5.4.17-2102.201.3.el7uek.x86_64Operating System: Oracle Linux Server 7.9OSType: linuxArchitecture: x86_64CPUs: 4Total Memory: 4.268GiBName: hhjID: HHHZ:DPVB:WA2L:J5BI:D4Q6:YMH4:NQEQ:WS4M:A6KP:R3JC:L6EW:LS6VDocker Root Dir: /var/lib/dockerDebug Mode: falseRegistry: https://index.docker.io/v1/Labels:Experimental: falseInsecure Registries:192.168.56.102:5000127.0.0.0/8Registry Mirrors:https://1nj0zren.mirror.aliyuncs.com/https://docker.mirrors.ustc.edu.cn/http://f1361db2.m.daocloud.io/https://registry.docker-cn.com/Live Restore Enabled: false

快速拉取openGauss最新镜像

[root@hhj ~]# docker pull enmotech/opengauss:latest
latest: Pulling from enmotech/opengauss
Digest: sha256:d5a3e38fa2553a44e7fa1cd5cad0b4f0845a679858764067d7b0052a228578a0
Status: Image is up to date for enmotech/opengauss:latest
docker.io/enmotech/opengauss:latest

修改openGauss的镜像标签

注意:不修改标签在启动容器时会报找不到镜像

[root@hhj ~]# docker tag enmotech/opengauss:latest opengauss:latest
[root@hhj ~]# docker images
REPOSITORY                                                        TAG        IMAGE ID       CREATED         SIZE
enmotech/opengauss                                                latest     b4dd24d09223   2 months ago    383MB
opengauss                                                         latest     b4dd24d09223   2 months ago    383MB

获取创建主备容器脚本并运行

[root@hhj ~]# # wget https://raw.githubusercontent.com/enmotech/enmotech-docker-opengauss/master/create_master_slave.sh
[root@hhj ~]## chmod +x create_master_slave.sh
[root@hhj ~]# ./create_master_slave.sh
Please input OG_SUBNET (容器所在网段) [172.11.0.0/24]:
OG_SUBNET set 172.11.0.0/24
Please input GS_PASSWORD (定义数据库密码)[Enmo@123]:
GS_PASSWORD set Enmo@123
Please input MASTER_IP (主库IP)[172.11.0.101]:
MASTER_IP set 172.11.0.101
Please input SLAVE_1_IP (备库IP)[172.11.0.102]:
SLAVE_1_IP set 172.11.0.102
Please input MASTER_HOST_PORT (主库数据库服务端口)[5432]:
MASTER_HOST_PORT set 5432
Please input MASTER_LOCAL_PORT (主库通信端口)[5434]:
MASTER_LOCAL_PORT set 5434
Please input SLAVE_1_HOST_PORT (备库数据库服务端口)[6432]:
SLAVE_1_HOST_PORT set 6432
Please input SLAVE_1_LOCAL_PORT (备库通信端口)[6434]:
SLAVE_1_LOCAL_PORT set 6434
Please input MASTER_NODENAME [opengauss_master]:
MASTER_NODENAME set opengauss_master
Please input SLAVE_NODENAME [opengauss_slave1]:
SLAVE_NODENAME set opengauss_slave1
Please input openGauss VERSION [1.0.1]: latest
openGauss VERSION set latest
starting
13b4cf3a545cdc51539b2f4e6b227536cacd5caa764a167701927d7a6cbd21e5
OpenGauss Database Network Created.
85c9894a167ca992c237900bb27ed50c8ffb323217de6c1011614f5a67f8dcd6
OpenGauss Database Master Docker Container created.
e3fbdd36d6203a34051eea9d6a756d404528a0dcdca169aa2be42502a45d3087
OpenGauss Database Slave1 Docker Container created.

注意如果遇到容器存在或者网络存在可以如下删除

[root@hhj ~]# docker rm opengauss_master
opengauss_master
[root@hhj ~]# docker network rm opengaussnetwork
opengaussnetwork

验证openGauss主备集群状态

查看容器启动情况

[root@hhj ~]# docker ps
CONTAINER ID   IMAGE              COMMAND                  CREATED          STATUS          PORTS                                                 NAMES
e3fbdd36d620   opengauss:latest   "entrypoint.sh -M st…"   13 seconds ago   Up 12 seconds   5432/tcp, 0.0.0.0:6432->6432/tcp, :::6432->6432/tcp   opengauss_slave1
85c9894a167c   opengauss:latest   "entrypoint.sh -M pr…"   46 seconds ago   Up 43 seconds   0.0.0.0:5432->5432/tcp, :::5432->5432/tcp             opengauss_master

进入openGauss主库

[root@hhj ~]# docker exec -it opengauss_master bash
root@opengauss_master:/# su - omm
omm@opengauss_master:~$ gsql
gsql ((openGauss 2.1.0 build 590b0f8e) compiled at 2021-09-30 14:29:04 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.omm=# \lList of databasesName    | Owner | Encoding |   Collate   |    Ctype    | Access privileges
-----------+-------+----------+-------------+-------------+-------------------omm       | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 |postgres  | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 |template0 | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/omm           +|       |          |             |             | omm=CTc/ommtemplate1 | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/omm           +|       |          |             |             | omm=CTc/omm
(4 rows)omm=# \q

检查主从情况

[2021-12-19 04:29:35.624][350][][gs_ctl]: gs_ctl query ,datadir is /var/lib/opengauss/dataHA state:local_role                     : Primarystatic_connections             : 1db_state                       : Normaldetail_information             : NormalSenders info:sender_pid                     : 320local_role                     : Primarypeer_role                      : Standbypeer_state                     : Normalstate                          : Streamingsender_sent_location           : 0/4000268sender_write_location          : 0/4000268sender_flush_location          : 0/4000268sender_replay_location         : 0/4000268receiver_received_location     : 0/4000268receiver_write_location        : 0/4000268receiver_flush_location        : 0/4000268receiver_replay_location       : 0/4000268sync_percent                   : 100%sync_state                     : Syncsync_priority                  : 1sync_most_available            : Onchannel                        : 172.11.0.101:5434-->172.11.0.102:38096Receiver info:
No information
omm@opengauss_master:~$
omm@opengauss_master:~$ exit
logout
root@opengauss_master:/# exit
exit

进入openGauss从库

root@opengauss_slave1:/# su - omm
omm@opengauss_slave1:~$ gsql -r -p6432
gsql ((openGauss 2.1.0 build 590b0f8e) compiled at 2021-09-30 14:29:04 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.omm=# \lList of databasesName    | Owner | Encoding |   Collate   |    Ctype    | Access privileges
-----------+-------+----------+-------------+-------------+-------------------omm       | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 |postgres  | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 |template0 | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/omm           +|       |          |             |             | omm=CTc/ommtemplate1 | omm   | UTF8     | en_US.UTF-8 | en_US.UTF-8 | =c/omm           +|       |          |             |             | omm=CTc/omm
(4 rows)omm=# \q

检查主从情况

omm@opengauss_slave1:~$  gs_ctl query -D /var/lib/opengauss/data/
[2021-12-19 04:31:24.788][361][][gs_ctl]: gs_ctl query ,datadir is /var/lib/opengauss/dataHA state:local_role                     : Standbystatic_connections             : 1db_state                       : Normaldetail_information             : NormalSenders info:
No informationReceiver info:receiver_pid                   : 338local_role                     : Standbypeer_role                      : Primarypeer_state                     : Normalstate                          : Normalsender_sent_location           : 0/40004A8sender_write_location          : 0/40004A8sender_flush_location          : 0/40004A8sender_replay_location         : 0/40004A8receiver_received_location     : 0/40004A8receiver_write_location        : 0/40004A8receiver_flush_location        : 0/40004A8receiver_replay_location       : 0/40004A8sync_percent                   : 100%channel                        : 172.11.0.102:38096<--172.11.0.101:5434omm@opengauss_slave1:~$ exit
logout
root@opengauss_slave1:/# exit
exit
[root@hhj ~]# docker ps
CONTAINER ID   IMAGE              COMMAND                  CREATED         STATUS         PORTS                                                 NAMES
e3fbdd36d620   opengauss:latest   "entrypoint.sh -M st…"   8 minutes ago   Up 8 minutes   5432/tcp, 0.0.0.0:6432->6432/tcp, :::6432->6432/tcp   opengauss_slave1
85c9894a167c   opengauss:latest   "entrypoint.sh -M pr…"   9 minutes ago   Up 9 minutes   0.0.0.0:5432->5432/tcp, :::5432->5432/tcp             opengauss_master

验证openGauss主备集群主从同步

进入主库创建表和插入数据

[root@hhj ~]# docker exec -it opengauss_master bash
root@opengauss_master:/# su - omm
omm@opengauss_master:~$ gsql -r
gsql ((openGauss 2.1.0 build 590b0f8e) compiled at 2021-09-30 14:29:04 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.omm= create table test(id int);
CREATE TABLE
omm=# insert into test values(1);
INSERT 0 1
omm=# insert into test values(2);
INSERT 0 1omm=# select * from test;id
----12
(2 rows)omm=# exit
omm-# \q
omm@opengauss_master:~$ exit
logout
root@opengauss_master:/# exit
exit

进入从库验证数据同步

[root@hhj ~]# docker exec -it opengauss_slave1 bash
root@opengauss_slave1:/# su - omm
omm@opengauss_slave1:~$ gsql -r -p 6432
gsql ((openGauss 2.1.0 build 590b0f8e) compiled at 2021-09-30 14:29:04 commit 0 last mr  )
Non-SSL connection (SSL connection is recommended when requiring high-security)
Type "help" for help.omm=# \dList of relationsSchema | Name | Type  | Owner |             Storage
--------+------+-------+-------+----------------------------------public | test | table | omm   | {orientation=row,compression=no}
(1 row)
omm=# select * from test;id
----12
(2 rows)

【参赛作品66】快速搭建一套openGauss主备高可用集群相关推荐

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【参赛作品66】快速搭建一套openGauss主备高可用集群

基础环境准备

快速拉取openGauss最新镜像

修改openGauss的镜像标签

获取创建主备容器脚本并运行

注意如果遇到容器存在或者网络存在可以如下删除

验证openGauss主备集群状态

查看容器启动情况

进入openGauss主库

检查主从情况

进入openGauss从库

检查主从情况

验证openGauss主备集群主从同步

进入主库创建表和插入数据

进入从库验证数据同步

【参赛作品66】快速搭建一套openGauss主备高可用集群相关推荐

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