fix: add image pre-pull before upgrades to prevent delays from slow image pulls (OP-237)

[kristina-solovyova]

TL;DR

Added image pre-pull functionality to improve cluster and client upgrades by ensuring container images are downloaded to nodes before the upgrade process begins.

What changed?

• Added image pre-pull capability that creates a DaemonSet(s) to pull container images on target nodes before upgrades
• Implemented pre-pull operations for both WekaCluster and WekaClient resources
• Added configuration options in Helm chart values to control pre-pull behavior:
  • upgrade.imagePrePull.enabled - Enable/disable pre-pulling (default: true)
  • upgrade.imagePrePull.timeout - Maximum time to wait for image pulls (default: 20m)
• Added cleanup logic to remove pre-pull DaemonSets after successful upgrades

How to test?

Use PRE_SETUP_HOOK to make sure there is no existing wekacluster running

Why make this change?

Image pre-pulling significantly improves upgrade reliability and performance by:

• Preventing upgrade failures due to image pull timeouts during rolling updates
• Reducing upgrade duration by downloading images in parallel across all nodes
• Ensuring images are available on nodes before the critical upgrade process begins
• Providing visibility into image pull progress before committing to an upgrade

This is especially valuable in environments with slow image registry access or large container images.

[kristina-solovyova]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• fix: add image pre-pull before upgrades to prevent delays from slow image pulls (OP-237) #2128 👈 (View in Graphite)
• chore: pass wekai-endpoint from gh vars #2151
• main

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[graphite-app]

Graphite Automations

"Add anton/matt/sergey/kristina as reviwers on operator PRs" took an action on this PR • (02/01/26)

2 reviewers were added to this PR based on Anton Bykov's automation.

[scalar-workers]

🤖 WekAI Remote Test Execution

Status: ❌ Failed
Worker: operator-ci

Error Details:

Wekai process failed with exit code 1

Result Preview:

{"plan_id":"","plan_url":"","status":"initializing","success":false,"result":"","error_details":"timeout waiting for document generation"}

Last updated: 2026-02-11 14:15:05 UTC • Commit: 68e2dca