Red Hat Summit Red Hat Summitサポートコンソール開発者トライアルの開始お問い合わせ

このコンテンツは選択した言語では利用できません。

10.6. Disaster Recovery

When the master volume goes offline, you can perform the following disaster recovery procedures to minimize the interruption of service:

10.6.1. Promoting a Slave to Master
リンクのコピー

If the master volume goes offline, you can promote a slave volume to be the master, and start using that volume for data access.
Run the following commands on the slave machine to promote it to be the master: 
# gluster volume set VOLNAME geo-replication.indexing on# gluster volume set VOLNAME geo-replication.indexing on# gluster volume set VOLNAME geo-replication.indexing on
# gluster volume set VOLNAME changelog on# gluster volume set VOLNAME changelog on# gluster volume set VOLNAME changelog on
Copy to Clipboard Toggle word wrap
You can now configure applications to use the slave volume for I/O operations.

10.6.2. Failover and Failback
リンクのコピー

Red Hat Storage provides geo-replication failover and failback capabilities for disaster recovery. If the master goes offline, you can perform a failover procedure so that a slave can replace the master. When this happens, all the I/O operations, including reads and writes, are done on the slave which is now acting as the master. When the original master is back online, you can perform a failback procedure on the original slave so that it synchronizes the differences back to the original master.

Performing a Failover and Failback

  1. Create a new geo-replication session with the original slave as the new master, and the original master as the new slave. For more information on setting and creating geo-replication session, see Section 10.3.4, “Setting Up your Environment for Geo-replication Session”.
  2. Start the special synchronization mode to speed up the recovery of data from slave. 
    # gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config special-sync-mode recover# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config special-sync-mode recover# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config special-sync-mode recover# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config special-sync-mode recover
    Copy to Clipboard Toggle word wrap
  3. Set a checkpoint to help verify the status of the data synchronization. 
    # gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config checkpoint now# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config checkpoint now# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config checkpoint now# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL config checkpoint now
    Copy to Clipboard Toggle word wrap
  4. Start the new geo-replication session using the following command: 
    # gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL start# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL start# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL start# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL start
    Copy to Clipboard Toggle word wrap
  5. Monitor the checkpoint output using the following command, until the status displays: checkpoint as of <time of checkpoint creation> is completed at <time of completion>. 
    # gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL status# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL status# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL status# gluster volume geo-replication ORIGINAL_SLAVE_VOL ORIGINAL_MASTER_HOST::ORIGINAL_MASTER_VOL status
    Copy to Clipboard Toggle word wrap
  6. To resume the original master and original slave back to their previous roles, stop the I/O operations on the original slave, and using steps 3 and 5, ensure that all the data from the original slave is restored back to the original master. After the data from the original slave is restored back to the original master, stop the current geo-replication session (the failover session) between the original slave and original master, and resume the previous roles.
  7. Reset the options that were set for promoting the slave volume as the master volume by running the following commands: 
    # gluster volume reset ORIGINAL_SLAVE_VOL geo-replication.indexing  # gluster volume reset ORIGINAL_SLAVE_VOL changelog
    Copy to Clipboard Toggle word wrap
    For more information on promoting slave volume to be the master volume, see Section 10.6.1, “Promoting a Slave to Master”.
トップに戻る
Red Hat logoGithubredditYoutubeTwitter

詳細情報

試用、購入および販売

コミュニティー

Red Hat ドキュメントについて

Red Hat をお使いのお客様が、信頼できるコンテンツが含まれている製品やサービスを活用することで、イノベーションを行い、目標を達成できるようにします。 最新の更新を見る.

多様性を受け入れるオープンソースの強化

Red Hat では、コード、ドキュメント、Web プロパティーにおける配慮に欠ける用語の置き換えに取り組んでいます。このような変更は、段階的に実施される予定です。詳細情報: Red Hat ブログ.

会社概要

Red Hat は、企業がコアとなるデータセンターからネットワークエッジに至るまで、各種プラットフォームや環境全体で作業を簡素化できるように、強化されたソリューションを提供しています。

Theme

© 2025 Red Hat