为保证单一机器故障时同一分区的多数派副本可用，OceanBase数据库会保证同一个分区的多个副本不调度在同一台机器上。由于同一个分区的副本分布在不同的Zone/Region下，在城市级灾难或者数据中心故障时既保证了数据的可靠性，又保证了数据库服务的可用性，达到可靠性与可用性的平衡。OceanBase数据库创新的容灾能力有三地五中心可以无损容忍城市级灾难，以及同城三中心可以无损容忍数据中心级故障。下面分别展示了这两种部署模式的形式。
视频讲解如下：
下面将以在多机上部署OceanBase集群社区版为例来演示如何部署OceanBase全分布式集群。下表展示了OceanBase全分布式集群中包含的实例信息。
OceanBase全分布式集群是真正用于生产环境的集群模式，它是指在多机上部署生产环境的分布式集群。
（1）在中控机上在线安装obd
# 如果宿主机可以连接网络，可执行如下命令在线安装。 bash -c "$(curl -s https://obbusiness-private.oss-cn-shanghai.aliyuncs.com/download-center/opensource/oceanbase-all-in-one/installer.sh)" # 如果/tmp目录空间不足，会导致下载文件无法写入。解决方案如下： # 修改文件/etc/fstab，增加如下内容： # tmpfs /tmp tmpfs nodev,nosuid,size=5G 0 0
（2）安装成功后将输出下面的信息
########################################################################## Install Finished ========================================================================== Setup Environment: source ~/.oceanbase-all-in-one/bin/env.sh Quick Start: obd demo Use Web Service to install: obd web Use Web Service to upgrade: obd web upgrade More Details: obd -h ==========================================================================
（3）执行下面的语句生效环境变量
source ~/.oceanbase-all-in-one/bin/env.sh # 安装成功后，/tmp 目录下会新增tmp.xxx文件夹作为安装目录，如：tmp.66RxuoJG0f。
（4）在中控节点上配置到各节点的免密码登录
# 生成密钥对。 ssh-keygen -t rsa # 复制公钥文件。 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.79.11 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.79.12 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.79.13 ssh-copy-id -i .ssh/id_rsa.pub root@192.168.79.14 # 验证免密码登录。 ssh 192.168.79.11 # 此时不需要输入密码即可登录当前主机。
（5）编辑部署描述文件all-components.yaml，内容如下：
# 注意：由于OceanBase中每个observer最小需要6G内存，因此需要保证虚拟机能够提供足够内存。可以将每台运行observer的虚拟机内存设置为8G。 user: username: root password: Welcome_7788 port: 22 oceanbase-ce: depends: - ob-configserver servers: - name: server1 ip: 192.168.79.11 - name: server2 ip: 192.168.79.12 - name: server3 ip: 192.168.79.13 global: cluster_id: 1 memory_limit: 6G system_memory: 1G datafile_size: 10G log_disk_size: 5G cpu_count: 2 production_mode: false enable_syslog_wf: false max_syslog_file_count: 4 root_password: Welcome_1 server1: mysql_port: 2881 rpc_port: 2882 obshell_port: 2886 home_path: /root/observer data_dir: /root/obdata redo_dir: /root/redo zone: zone1 server2: mysql_port: 2881 rpc_port: 2882 obshell_port: 2886 home_path: /root/observer data_dir: /root/obdata redo_dir: /root/redo zone: zone1 server3: mysql_port: 2881 rpc_port: 2882 obshell_port: 2886 home_path: /root/observer data_dir: /root/obdata redo_dir: /root/redo zone: zone2 obproxy-ce: depends: - oceanbase-ce - ob-configserver servers: - 192.168.79.11 - 192.168.79.13 global: listen_port: 2883 prometheus_listen_port: 2884 home_path: /root/obproxy enable_cluster_checkout: false skip_proxy_sys_private_check: true enable_strict_kernel_release: false obproxy_sys_password: 'Welcome_1' observer_sys_password: 'Welcome_1' obagent: depends: - oceanbase-ce servers: - name: server1 ip: 192.168.79.11 - name: server2 ip: 192.168.79.12 - name: server3 ip: 192.168.79.13 global: home_path: /root/obagent prometheus: servers: - 192.168.79.14 depends: - obagent global: home_path: /root/prometheus grafana: servers: - 192.168.79.14 depends: - prometheus global: home_path: /root/grafana login_password: 'Welcome_1' ob-configserver: servers: - 192.168.79.14 global: listen_port: 8080 home_path: /root/ob-configserver
（6）执行命名部署集群
obd cluster deploy myob-cluster -c all-components.yaml # myob-cluster为集群的名称。
（7）部署完成后，执行命令启动OceanBase
obd cluster start myob-cluster # 启动成功后将输出下面的信息： ...... +------------------------------------------------------------------+ | ob-configserver | +---------------+------+---------------+----------+--------+-------+ | server | port | vip_address | vip_port | status | pid | +---------------+------+---------------+----------+--------+-------+ | 192.168.79.14 | 8080 | 192.168.79.14 | 8080 | active | 51742 | +---------------+------+---------------+----------+--------+-------+ curl -s 'http://192.168.79.14:8080/services?Action=GetObProxyConfig' Connect to observer 192.168.79.11:2881 ok Wait for observer init ok +-------------------------------------------------+ | oceanbase-ce | +---------------+---------+------+-------+--------+ | ip | version | port | zone | status | +---------------+---------+------+-------+--------+ | 192.168.79.11 | 4.3.5.1 | 2881 | zone1 | ACTIVE | | 192.168.79.12 | 4.3.5.1 | 2881 | zone1 | ACTIVE | | 192.168.79.13 | 4.3.5.1 | 2881 | zone2 | ACTIVE | +---------------+---------+------+-------+--------+ obclient -h192.168.79.11 -P2881 -uroot -p'Welcome_1' -Doceanbase -A cluster unique id: ca2bc58a-5296-598f-8c3c-89efb5210f03-195d6f47d1f-01050304 Connect to obproxy ok +-------------------------------------------------------------------+ | obproxy-ce | +---------------+------+-----------------+-----------------+--------+ | ip | port | prometheus_port | rpc_listen_port | status | +---------------+------+-----------------+-----------------+--------+ | 192.168.79.11 | 2883 | 2884 | 2885 | active | | 192.168.79.13 | 2883 | 2884 | 2885 | active | +---------------+------+-----------------+-----------------+--------+ obclient -h192.168.79.11 -P2883 -uroot@proxysys -p'Welcome_1' -Doceanbase -A Connect to Obagent ok +------------------------------------------------------------------+ | obagent | +---------------+--------------------+--------------------+--------+ | ip | mgragent_http_port | monagent_http_port | status | +---------------+--------------------+--------------------+--------+ | 192.168.79.11 | 8089 | 8088 | active | | 192.168.79.12 | 8089 | 8088 | active | | 192.168.79.13 | 8089 | 8088 | active | +---------------+--------------------+--------------------+--------+ Connect to Prometheus ok +---------------------------------------------------------+ | prometheus | +---------------------------+-------+------------+--------+ | url | user | password | status | +---------------------------+-------+------------+--------+ | http://192.168.79.14:9090 | admin | ucws4ExTcX | active | +---------------------------+-------+------------+--------+ Connect to grafana ok +-------------------------------------------------------------------+ | grafana | +---------------------------------------+-------+----------+--------+ | url | user | password | status | +---------------------------------------+-------+----------+--------+ | http://192.168.79.14:3000/d/oceanbase | admin | admin | active | +---------------------------------------+-------+----------+--------+ myob-cluster running ......
