oceanbase环境介绍:

192.168.1.4

192.168.1.3

192.168.1.5

配置三台机器免密:

# 生成密钥对

# ssh-keygen -t rsa

# 复制免登公钥到其它目标机器，修改user和ip

# ssh-copy-id root@{ip}

输入密码

最终确保三台机器之间ssh不需要输入密码

登录其中一台机器192.168.1.4

# mkdir -p /data/oceanbase

# cd /data/oceanbase

#### 数据库配置文件模板

# cat local-example.yaml

oceanbase-ce:

servers:

# Please don't use hostname, only IP can be supported

- 192.168.1.4

- 192.168.1.3

- 192.168.1.5

global:

# The working directory for OceanBase Database. OceanBase Database is started under this directory. This is a required field.

home_path: /data/observer

# The directory for data storage. The default value is $home_path/store.

# data_dir: /data

# The directory for clog, ilog, and slog. The default value is the same as the data_dir value.

# redo_dir: /redo

# Please set devname as the network adaptor's name whose ip is in the setting of severs.

# if set severs as "127.0.0.1", please set devname as "lo"

# if current ip is 192.168.1.10, and the ip's network adaptor's name is "eth0", please use "eth0"

devname: p8p1

mysql_port: 2881 # External port for OceanBase Database. The default value is 2881. DO NOT change this value after the cluster is started.

rpc_port: 2882 # Internal port for OceanBase Database. The default value is 2882. DO NOT change this value after the cluster is started.

zone: zone1

cluster_id: 1

# please set memory limit to a suitable value which is matching resource.

memory_limit: 8G # The maximum running memory for an observer

system_memory: 4G # The reserved system memory. system_memory is reserved for general tenants. The default value is 30G.

stack_size: 512K

cpu_count: 8

cache_wash_threshold: 1G

__min_full_resource_pool_memory: 268435456

workers_per_cpu_quota: 8

schema_history_expire_time: 1d

# The value of net_thread_count had better be same as cpu's core number.

net_thread_count: 4

sys_bkgd_migration_retry_num: 3

minor_freeze_times: 10

enable_separate_sys_clog: 0

enable_merge_by_turn: FALSE

datafile_disk_percentage: 20 # The percentage of the data_dir space to the total disk space. This value takes effect only when datafile_size is 0. The default value is 90.

syslog_level: INFO # System log level. The default value is INFO.

enable_syslog_wf: false # Print system logs whose levels are higher than WARNING to a separate log file. The default value is true.

enable_syslog_recycle: true # Enable auto system log recycling or not. The default value is false.

max_syslog_file_count: 4 # The maximum number of reserved log files before enabling auto recycling. The default value is 0.

# root_password: # root user password, can be empty

部署 OceanBase 数据库

# obd cluster deploy ob_test -c local-example.yaml -A

oceanbase-ce-3.1.4 already installed.

+-------------------------------------------------------------------------------------------+

| Packages |

+--------------+---------+-----------------------+------------------------------------------+

+--------------+---------+-----------------------+------------------------------------------+

| oceanbase-ce | 3.1.4 | 10000092022071511.el7 | c5cd94f4f190317b6a883c58a26460a506205ce6 |

+--------------+---------+-----------------------+------------------------------------------+

Repository integrity check ok

Parameter check ok

Open ssh connection ok

Cluster status check ok

Initializes observer work home ok

Remote oceanbase-ce-3.1.4-10000092022071511.el7-c5cd94f4f190317b6a883c58a26460a506205ce6 repository install ok

Send /root/.obd/repository/oceanbase-ce/3.1.4/c5cd94f4f190317b6a883c58a26460a506205ce6/etc to /root/.obd/repository/oceanbase-ce/3.1.4/c5cd94f4f190317b6a883c58a26460a506205ce6/etc ok

Remote oceanbase-ce-3.1.4-10000092022071511.el7-c5cd94f4f190317b6a883c58a26460a506205ce6 repository lib check !!

Try to get lib-repository

oceanbase-ce-libs-3.1.4 already installed.

Remote oceanbase-ce-libs-3.1.4-10000092022071511.el7-6d5437b0cad486b55963f89b8ef3769af7995350 repository install ok

Remote oceanbase-ce-3.1.4-10000092022071511.el7-c5cd94f4f190317b6a883c58a26460a506205ce6 repository lib check ok

ob_test deployed

启动 OceanBase 数据库:

# obd cluster start ob_test

Get local repositories ok

Search plugins ok

Open ssh connection ok

Load cluster param plugin ok

Check before start observer ok

[WARN] (192.168.1.4) The recommended value of fs.aio-max-nr is 1048576 (Current value: 65536)

[WARN] (192.168.1.4) clog and data use the same disk (/data)

[WARN] (192.168.1.3) The recommended value of fs.aio-max-nr is 1048576 (Current value: 65536)

[WARN] (192.168.1.3) clog and data use the same disk (/data)

[WARN] (192.168.1.5) The recommended value of fs.aio-max-nr is 1048576 (Current value: 65536)

[WARN] (192.168.1.5) clog and data use the same disk (/)

Start observer ok

observer program health check ok

Connect to observer ok

Initialize cluster

Cluster bootstrap \

Cluster bootstrap |

Cluster bootstrap ok

Create tenant test ok

Wait for observer init ok

+-------------------------------------------------+

| observer |

+---------------+---------+------+-------+--------+

+---------------+---------+------+-------+--------+

| 192.168.1.3 | 3.1.4 | 2881 | zone1 | active |

| 192.168.1.4 | 3.1.4 | 2881 | zone1 | active |

| 192.168.1.5 | 3.1.4 | 2881 | zone1 | active |

+---------------+---------+------+-------+--------+

ob_test running

三台机器上分别安装OceanBase数据库客户端 OBClient

# yum install -y obclient

连接OceanBase数据库(其中任何一台皆可)

# obclient -h192.168.1.3 -P2881 -uroot

Welcome to the OceanBase. Commands end with ; or \g.

Your OceanBase connection id is 3221749761

Server version: 5.7.25 OceanBase 3.1.4 (r10000092022071511-b4bfa011ceaef428782dcb65ae89190c40b78c2f) (Built Jul 15 2022 11:45:14)

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

obclient [(none)]> show databases;

+--------------------+

| Database |

+--------------------+

| oceanbase |

| information_schema |

| mysql |

| SYS |

| LBACSYS |

| ORAAUDITOR |

| test |

+--------------------+

7 rows in set (0.092 sec)

obclient [(none)]> use test

Database changed

obclient [test]> show tables;

Empty set (0.005 sec)

obclient [test]> create table test(id int primary key,name varchar(10));

Query OK, 0 rows affected (0.502 sec)

obclient [test]> insert into test values(1,"zhangsan");

Query OK, 1 row affected (0.133 sec)

obclient [test]> insert into test values(2,"lisi");

Query OK, 1 row affected (0.023 sec)

obclient [test]> insert into test values(3,"wangwu");

Query OK, 1 row affected (0.023 sec)

obclient [test]> insert into test values(4,"chenfeng");

Query OK, 1 row affected (0.030 sec)

obclient [test]> insert into test values(5,"liujing");

Query OK, 1 row affected (0.021 sec)

obclient [test]> insert into test values(6,"huangshan");

Query OK, 1 row affected (0.102 sec)

obclient [test]> select * from test;

+----+-----------+

| id | name |

+----+-----------+

| 1 | zhangsan |

| 2 | lisi |

| 3 | wangwu |

| 4 | chenfeng |

| 5 | liujing |

| 6 | huangshan |

+----+-----------+

6 rows in set (0.028 sec)

obclient [test]>

连接其他机器上的oceanbase：

# obclient -h192.168.1.5 -P2881 -uroot

Welcome to the OceanBase. Commands end with ; or \g.

Your OceanBase connection id is 3222012104

Server version: 5.7.25 OceanBase 3.1.4 (r10000092022071511-b4bfa011ceaef428782dcb65ae89190c40b78c2f) (Built Jul 15 2022 11:45:14)

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

obclient [(none)]> use test

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

obclient [test]> show tables;

+----------------+

| Tables_in_test |

+----------------+

| test |

+----------------+

1 row in set (0.002 sec)

查看刚刚创建的表:

obclient [test]> select * from test;

+----+-----------+

| id | name |

+----+-----------+

| 1 | zhangsan |

| 2 | lisi |

| 3 | wangwu |

| 4 | chenfeng |

| 5 | liujing |

| 6 | huangshan |

+----+-----------+

6 rows in set (0.021 sec)

obclient [test]> \q

##obd命令帮助

# obd -h

Usage: obd <command> [options]

Available commands:

cluster Deploy and manage a cluster.

mirror Manage a component repository for OBD.

repo Manage local repository for OBD.

test Run test for a running deployment.

update Update OBD.

Options:

--version show program's version number and exit

-h, --help Show help and exit.

-v, --verbose Activate verbose output.

查看obd管理的集群列表:

# obd cluster list

+--------------------------------------------------------+

| Cluster List |

+---------+----------------------------+-----------------+

| Name | Configuration Path | Status (Cached) |

+---------+----------------------------+-----------------+

| ob_test | /root/.obd/cluster/ob_test | running |

| test | /root/.obd/cluster/test | configured |

+---------+----------------------------+-----------------+

查看集群状态

# obd cluster display ob_test

Get local repositories and plugins ok

Open ssh connection ok

Cluster status check ok

Connect to observer ok

Wait for observer init ok

+-------------------------------------------------+

| observer |

+---------------+---------+------+-------+--------+

+---------------+---------+------+-------+--------+

| 192.168.1.3 | 3.1.4 | 2881 | zone1 | active |

| 192.168.1.4 | 3.1.4 | 2881 | zone1 | active |

| 192.168.1.5 | 3.1.4 | 2881 | zone1 | active |

+---------------+---------+------+-------+--------+

### obd clustern命令帮助

# obd cluster --help

Usage: obd cluster <command> [options]

Available commands:

autodeploy Deploy a cluster automatically by using a simple configuration file.

check4ocp Check Whether OCP Can Take Over Configurations in Use

chst Change Deployment Configuration Style

deploy Deploy a cluster by using the current deploy configuration or a deploy yaml file.

destroy Destroy a deployed cluster.

display Display the information for a cluster.

edit-config Edit the configuration file for a specific deployment.

list List all the deployments.

redeploy Redeploy a started cluster.

reinstall Reinstall a deployed component

reload Reload a started cluster.

restart Restart a started cluster.

start Start a deployed cluster.

stop Stop a started cluster.

tenant Create or drop a tenant.

upgrade Upgrade a cluster.

Options:

-h, --help Show help and exit.

-v, --verbose Activate verbose output.

销毁一个集群：

# obd cluster destroy ob_test

Get local repositories ok

Search plugins ok

Open ssh connection ok

Cluster status check ok

observer work dir cleaning ok

ob_test destroyed

OceanBase 部署中遇到的相关报错:

一.[ERROR] lo fail to ping . Please check configuration `devname`

解决方法：

修改local-example.yaml配置文件里devname: p8p1，此处要求三台服务器的网卡名称必须一致，否则会报如上错。

二.[ERROR] Cluster NTP is out of sync

解决方法：

oceanbase需要用到ntp服务来同步每台机器的服务器时间,需要分别启动三台机器的ntp服务：

# systemctl start ntpd

查看ntp服务状态：

# systemctl status ntpd

● ntpd.service - Network Time Service

Loaded: loaded (/usr/lib/systemd/system/ntpd.service; disabled; vendor preset: disabled)

Active: active (running) since 四 2022-08-25 14:22:29 CST; 21s ago

Process: 26162 ExecStart=/usr/sbin/ntpd -u ntp:ntp $OPTIONS (code=exited, status=0/SUCCESS)

Main PID: 26163 (ntpd)

Tasks: 1

Memory: 1.4M

CGroup: /system.slice/ntpd.service

└─26163 /usr/sbin/ntpd -u ntp:ntp -g

8月 25 14:22:29 test3 ntpd[26163]: Listen normally on 2 lo 127.0.0.1 UDP 123

8月 25 14:22:29 test3 ntpd[26163]: Listen normally on 3 p8p1 192.168.1.4 UDP 123

8月 25 14:22:29 test3 ntpd[26163]: Listen normally on 4 docker0 172.17.0.1 UDP 123

8月 25 14:22:29 test3 ntpd[26163]: Listen normally on 5 lo ::1 UDP 123

8月 25 14:22:29 test3 ntpd[26163]: Listen normally on 6 p8p1 fe80::edcf:9cb5:2fbe:d875 UDP 123

8月 25 14:22:29 test3 ntpd[26163]: Listening on routing socket on fd #23 for interface updates

8月 25 14:22:29 test3 ntpd[26163]: 0.0.0.0 c016 06 restart

8月 25 14:22:29 test3 ntpd[26163]: 0.0.0.0 c012 02 freq_set kernel 0.000 PPM

8月 25 14:22:29 test3 ntpd[26163]: 0.0.0.0 c011 01 freq_not_set

8月 25 14:22:37 test3 ntpd[26163]: 0.0.0.0 c614 04 freq_mode

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