使用Percona Backup for MongoDB备份单实例

使用Percona Backup for MongoDB备份单实例

1、Percona Backup for MongoDB介绍

Percona Backup for MongoDB (PBM) is an open source and distributed solution for consistent backups and restores of MongoDB sharded clusters and replica sets to a specific point in time.

2、备份单个MongoDB实例

如果是独立的MongoDB实例，在pbm config时就会失败。

[root@mongodb01 ~]# pbm config --file /mongodb/app/pbm/pbm_config.yaml
Error: unable to set config: write to db: get cluster time: no clusterTime in response

官网也给出了支持的部署模式

Percona Backup for MongoDB works with sharded clusters and replica sets. It doesn’t work on standalone MongoDB instances. This is because Percona Backup for MongoDB requires oplog to guarantee backup consistency. Oplog is available on nodes with replication enabled.

For testing purposes, you can deploy Percona Backup for MongoDB on a single-node replica set. To convert a standalone server into a replica set, specify the replication.replSetName option in the configuration file and then initiate the replica set.

重点：支持分别集群和复制集，不支持独立的MongoDB实例，因为需要满足一致性，这里需要oplog

3、如何备份单个MongoDB实例

方法是把这个实例转换成只有一个节点的复制集。

3.1、配置

1.修改参数
replication:
   oplogSizeMB: 2048
   replSetName: rsdemo
   enableMajorityReadConcern: true

2.重启MongoDB

3.初始化集群
[root@mongodb01 ~]# mongosh

rs.initiate( {
   _id : "rsdemo",
   members: [
      { _id: 0, host: "192.168.5.130:27017" }
   ]
})

4.检查状态
 rs.status()

3.2、pbm config

[root@mongodb01 ~]# pbm config --file /mongodb/app/pbm/pbm_config.yaml
pitr:
  enabled: false
  oplogSpanMin: 0
storage:
  type: filesystem
  filesystem:
    path: /mongodb/backup

4、创建备份

[root@mongodb01 ~]# pbm backup --type=logical
Starting backup '2024-08-25T07:05:00Z'.........Backup '2024-08-25T07:05:00Z' to remote store '/mongodb/backup' has started

[root@mongodb01 ~]# pbm status
Cluster:
========
rsdemo:
  - rsdemo/192.168.5.130:27017 [P]: pbm-agent v2.5.0 OK


PITR incremental backup:
========================
Status [OFF]

Currently running:
==================
(none)

Backups:
========
FS  /mongodb/backup
  Snapshots:
    2024-08-25T07:05:00Z 4.31MB <logical> [restore_to_time: 2024-08-25T07:05:11Z]
[root@mongodb01 ~]# pbm list
Backup snapshots:
  2024-08-25T07:05:00Z <logical> [restore_to_time: 2024-08-25T07:05:11Z]

PITR <off>: