CentOS7下cratedb备份及恢复(快照)
一:创建存储库
1.1 概要
CREATE REPOSITORY repository_name TYPE type
[ WITH (repository_parameter [= value], [, ...]) ]
CRATE REPOSITORY 创建存储库
repository_name 库名
WITH 存储库参数
max_snapshot_bytes_per_sec: 在此存储库单个节点上创建快照的最大速率。
默认:40mb每秒
max_restore_bytes_per_sec: 此存储库在单个节点上还原快照的最大速率。
默认:40mb每秒
1.2存储库类型
1.2.1 fs
服务端配置:
centos7配置nfs
yum -y install nfs-utils rpcbind
设置服务开机启动:
systemctl enable rpcbind
systemctl enable nfs-server
systemctl enable nfs-lock
systemctl enable nfs-idmap
启动nfs服务:
systemctl start rpcbind
systemctl start nfs-server
systemctl start nfs-lock
systemctl start nfs-idmap
建立共享目录:
mkdir -p /nfs
chmod -R 777 /nfs
配置需要共享的目录到 /etc/exports
vim /etc/exports
/nfs 192.168.10.*(rw,sync,no_root_squash)
重新加载:
exportfs -rv
查看是否挂载:
showmount -e
客户端配置:注:客户端不需要启动nfs!
安装nfs:
yum -y install nfs-utils
查看nfs共享目录:
showmount -e 192.168.x.x
建立目录:
mkdir /nfs
挂载nfs:
mount -t nfs 192.168.10.205:/nfs /nfs
如需要卸载:
unmount /nfs
查看挂载情况:
df
配置客户端开机自动挂载nfs共享目录
vim /etc/fstab
添加 192.168.x.x:/nfs /nfs nfs defaults 0 0
配置crate.yml文件nfs选项:
vim /etc/crate/crate.yml
添加repo路径:
path.repo: /nfs/crate
进入crash:
./usr/local/crash
cr> \c 192.168.x.x:4200
设置存储库:
cr> CREATE REPOSITORY test205 TYPE fs WITH (location = '/nfs/crate');
1.2.2 hdfs
1.2.3 s3
1.2.4 url
二:创建快照
cr> create snapshot test205.snapshot2 all;
查询快照:
cr> SELECT repository, name, state, concrete_indices FROM sys.snapshots ORDER BY repository, name;
三:恢复快照
3.1查询表
show tables;
3.1如要从快照还原表,要先删除表:
DROP TABLE tablename;
3.2恢复快照
cr> RESTORE SNAPSHOT test205.snapshot2 TABLE test WITH (wait_for_completion=true);
四:删除快照
4.1查询快照:
SELECT repository, name, state, concrete_indices FROM sys.snapshots ORDER BY repository, name;
4.2删除快照:
cr> DROP SNAPSHOT test205.snapshot1;
五:删除存储库
cr> DROP REPOSITORY "OldRepository";
参考:
https://crate.io/docs/crate/reference/en/latest/admin/snapshots.html#creating-a-repository
感谢:
https://blog.csdn.net/wudinaniya/article/details/81068518