OCP 4.10 Test enabling HTTP Compression in CLAB

[StevenBarre]

Describe the issue In OCP 4.10 we can enable compression in HAProxy of select MIMETypes.

https://docs.openshift.com/container-platform/4.10/release_notes/ocp-4-10-release-notes.html#ocp-4-10-ne-router-compression

Ingress Controller router compression This enhancement adds the ability to configure global HTTP traffic compression on the HAProxy Ingress Controller for specific MIME types. This update enables gzip-compression of your ingress workloads when there are large amounts of compressible routed traffic.

For more information, see Using router compression.

There's a list of mimetypes that should be compressed at https://letstalkaboutwebperf.com/en/gzip-brotli-server-config/ - tried using the full list but Openshift wouldn't accept some of the mimetypes. Those have been removed.

What is the Value/Impact? This will improve the performance of web pages for apps that haven't configured compression themselves.

What is the plan? How will this get completed?

• Test in CLAB
• Discuss with Matt on if there are any risks, what he thinks of the mimetype list (Gerald was concerned about compressing json)
• Update playbooks/docs to include compression config in the rest of the clusters during their upgrades

Identify any dependencies Need feedback from Matt before moving it to PROD

Definition of done

• [x] HTTP Compression enabled in CLAB, and upgrade steps for the rest of the clusters documented.

[tbaker1313]

Added this list of mime types and enabled compression in CLAB: spec: httpCompression: mimeTypes:

• text/html
• text/css
• text/plain
• text/xml
• text/x-component
• text/javascript
• application/x-javascript
• application/javascript
• application/json
• application/manifest+json
• application/xml
• application/xhtml+xml
• application/rss+xml
• application/atom+xml
• application/x-font-ttf
• application/x-font-opentype
• application/x-font-truetype
• image/svg+xml
• image/x-icon

[tbaker1313]

This is implemented, instructions have been added to the upgrade docs.

[tbaker1313]

Closing this as testing was successful in CLAB and will create new RFCs and tickets for implementing in PROD.