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。

11.7. Making Applications Highly Available

When a scalable application is configured to be highly available, it provides multiple HAProxy gears to which an external routing layer can route traffic. This prevents any downtime.
To use this feature, you first must have the capability to make your application highly available. Contact your system administrator for more information.
After your system administrator has enabled this capability on your account, you can then enable scalable applications to be highly available using the client tools: 
# rhc app enable-ha App_Namerhc app enable-ha App_Name
Copy to Clipboard Toggle word wrap
Alternatively, you can make your application highly available using the following REST API call: 
$ curl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-hacurl -X POST https://Hostname/broker/rest/domains/Domain_Name/applications/App_Name/events --user Username:Password --data-urlencode event=make-ha
Copy to Clipboard Toggle word wrap
If an application has already been scaled past a single gear, you may need to scale up the application to deploy additional instances of HAProxy. When an application is scaled past two gears, enable-ha does not add a second HAProxy cartridge to the application. To resolve this, a scale-up event needs to happen for the second HAProxy cartridge to be added: 
# rhc app-scale-up test2
Copy to Clipboard Toggle word wrap
or 
# rhc cartridge-scale cartridge -a test2 --min min_valuerhc cartridge-scale cartridge -a test2 --min min_valuerhc cartridge-scale cartridge -a test2 --min min_valuerhc cartridge-scale cartridge -a test2 --min min_value
Copy to Clipboard Toggle word wrap
Once the application has been scaled up, the second HAProxy instance will remain as long as the application is scaled to at least two gears.
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