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Changes for page Rancher 2

Last modified by Diana Strebkova on 2025/12/12 14:23
From version 22.1
edited by Diana Strebkova
on 2025/12/12 14:23
Change comment: There is no comment for this version
To version 11.1
edited by Diana Strebkova
on 2025/12/12 12:08
Change comment: There is no comment for this version

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249 249  
250 250  oci:~/~/registry.sdc.t-systems.net/devopsaas-helm/jenkins-lib
251 251  
252 -{{box}}
253 -Take into account, that all internal harbor repositories with helm charts have PKEY-helm naming convention, adding repo with both docker images and helm charts is not supported in rancher.
254 -{{/box}}
252 +{{info}}
253 +Take into account, that all internal harbor repositories with helm charts have PKEY-helm naming convention, adding repo with both docker images and helm charts may not be supported in rancher.
254 +{{/info}}
255 255  )))
256 256  
257 257  {{info}}
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281 281  (% class="p1" %)
282 282  In Rancher UI, switch to the intended cluster and go to Apps/Repositories using the left side menu.
283 283  
284 +(% class="p1" %)
284 284  
285 285  [[image:attach:Screenshot 2023-04-25 at 13.11.48.png||data-xwiki-image-style-border="true" queryparams="effects=drop-shadow" height="400" width="209"]]
286 286  
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287 287  (% class="p1" %)
288 288  Create a new Repository by pressing the Create button.
289 289  
290 -(% class="p1" id="HTarget:http28s29URL-1" %)
291 -[[image:attach:Screenshot 2023-04-25 at 13.30.33.png||data-xwiki-image-style-border="true" queryparams="effects=drop-shadow" height="127" width="1100"]]
291 +(% id="HTarget:http28s29URL-1" class="p1" %)
292 +==== [[image:attach:Screenshot 2023-04-25 at 13.30.33.png||data-xwiki-image-style-border="true" queryparams="effects=drop-shadow" height="127" width="1100"]] ====
292 292  
293 293  (% id="HTarget:http28s29URL-1" class="p1" %)
294 294  ==== Target: http(s) URL ====
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335 335  (% class="wikigeneratedid" %)
336 336  Click Create.
337 337  
339 +
338 338  (% class="wrapped" %)
339 339  |=(((
340 340  Field
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361 361  {{/info}}
362 362  )))
363 363  
364 -== Migrating chart repositories in rancher to new OCI Repository format ==
366 +=== Migrating chart repositories in rancher to new OCI Repository format ===
365 365  
366 -(% class="box warningmessage" %)
367 -(((
368 -ChartMuseum is being deprecated. After the migration is complete, **all harbor charts will be removed from ChartMuseum**, and **old HTTP(S)-based chart repositories will no longer work in Rancher (for internal harbor charts)**.
369 -)))
368 +# Migration Guide: ChartMuseum → OCI-based Chart Repositories in Rancher
370 370  
371 -(% class="box" %)
372 -(((
373 -**We will make your charts available in the corresponding new `<pkey>-helm` OCI projects. During migration, please adapt your helm push commands and url's for new oci-compatible repository.**
374 -)))
370 +## Overview
371 +ChartMuseum is being deprecated. After the migration is complete, **all charts will be removed from ChartMuseum**, and **old HTTP(S)-based chart repositories will no longer work in Rancher**.
375 375  
376 -There are two ways to migrate your repositories:
373 +To ensure a smooth transition, each project should **add an OCI-based repository alongside the existing ChartMuseum repository** during the migration phase.
377 377  
378 -1. ##Direct Transition (Editing the Existing Repository)##
379 -1*. Change the target to “OCI Repository”.
380 -1*. Update the URL as required (the repository name cannot be changed), check **Target: OCI Repository** documentation above
381 -1*. After saving, installed apps will automatically start using the updated repository.
382 -1*. (% class="box" %)
383 -(((
384 -Important limitation: OCI repositories must point directly to a single chart repository, not to a parent folder.
385 -If your old repository included several charts (for example “bitbucket” and “jira”), then after switching to OCI you can only target one chart (e.g. “bitbucket”).
386 -The other charts will no longer receive updates through this repo, and you will still need to create additional repositories for each individual chart.
387 -)))
388 -1. Add New Repositories One by One (Recommended), preserve the old one till the end. This approach allows a smooth transition while the old ChartMuseum repository continues to function. You can:
389 -1*. Create a new OCI repository for each chart,
390 -1*. Keep the old ChartMuseum repo enabled during the migration,
391 -1*. Migrate applications gradually following the steps described here.
392 -1*. This avoids disruptions and allows controlled migration.
393 -
394 -1. //Special Case: Old Repo Targeting Multiple Chart Repos//
395 -If your existing repository targets multiple chart repositories and you need the new OCI setup to behave the same way, please **contact support.**
375 +We will make your charts available in the corresponding new `<pkey>-helm` OCI projects.
396 396  
397 -To ensure a smooth transition, we recommend to **add an OCI-based repository alongside the existing ChartMuseum repository** during the migration phase. If you don't w
377 +---
398 398  
399 -| Term | Meaning
400 -| **Old Repository** | The existing HTTP/HTTPS Harbor ChartMuseum repository.
401 -| **New Repository** | The new OCI-based Helm chart repository created for your project (e.g. `<chart-repo-name>` in `<pkey>-helm`).
379 +## Terminology
380 +| Term | Meaning |
381 +|------|---------|
382 +| **Old Repository** | The existing HTTP/HTTPS ChartMuseum repository. |
383 +| **New Repository** | The new OCI-based Helm chart repository created for your project (e.g. `<chart-repo-name>` in `<pkey>-helm`). |
402 402  
403 -##__**Why This Migration Is Required:**__##
385 +---
404 404  
405 -* ##ChartMuseum is deprecated and will be removed.##
406 -* ##Applications deployed from old repos keep a reference to that repo inside their labels.##
407 -* ##Without updating the application to point to the new OCI repo, **Rancher will not detect new chart versions from new repository**.##
387 +## Why This Migration Is Required
388 +- ChartMuseum is deprecated and will be removed.
389 +- Applications deployed from old repos keep a reference to that repo inside their labels.
390 +- Without updating the application to point to the new OCI repo, **Rancher will not detect new chart versions**.
408 408  
409 -## Migration Steps:##
392 +---
410 410  
411 -1. ##Create the New OCI Repository in Rancher##
412 -11. Go to **Apps → Repositories**.
413 -11. Add a new repository of type **OCI**.
414 -11. Name it similarly to your old repo name (e.g. `<chart-repo-name>-oci`). __**You can't name it the same and can't rename it later.**__
415 -11. Point it to the new OCI endpoint.
416 -1. ##Disable the Old ChartMuseum Repository Temporarily## 
417 -##This step ensures that Rancher resolves charts from the new OCI repo.##
418 -11. Go to **Apps → Repositories**.
419 -11. Disable the old HTTP(S)-based repository.
420 -11. Keep it disabled until the migration is done.
421 -[[image:1765548124989-482.59.06.png||height="152" width="485"]]
422 -1. ##Update Existing Applications to Use the New OCI Repo##
423 -Applications deployed with the old repository still contain the old repo name in their metadata. You must upgrade them once to transition.
424 -11. Go to **Apps → Installed Apps**.
425 -11. Open the application that was deployed using the old repo.
426 -11. Click **Edit/Upgrade**.
427 -[[image:1765548598644-830.png||height="138" width="811"]]
428 -11. In the list of available chart repositories (scroll to the bottom), select the **new OCI repository**. Or enter the chart name in search bar:
429 -[[image:1765548750604-334.png||height="293" width="308"]]
430 -11. Choose the chart version you want to deploy (same or newer).
431 -11. Click **Upgrade**.
432 -1. ##Re-enable the Old Repository (Optional) ##
394 +## Migration Steps
395 +
396 +### 1. Create the New OCI Repository in Rancher
397 +1. Go to **Apps → Repositories**.
398 +2. Add a new repository of type **OCI**.
399 +3. Name it exactly like your old repo name (e.g. `<chart-repo-name>`).
400 +4. Point it to the new OCI endpoint.
401 +
402 +---
403 +
404 +### 2. Disable the Old ChartMuseum Repository Temporarily
405 +This step ensures that Rancher resolves charts from the new OCI repo.
406 +
407 +1. Go to **Apps → Repositories**.
408 +2. Disable the old HTTP(S)-based repository.
409 +3. Keep it disabled until the migration is done.
410 +
411 +---
412 +
413 +### 3. Update Existing Applications to Use the New OCI Repo
414 +Applications deployed with the old repository still contain the old repo name in their metadata.
415 +You must upgrade them once to transition.
416 +
417 +1. Go to **Apps → Installed Apps**.
418 +2. Open the application that was deployed using the old repo.
419 +3. Click **Upgrade**.
420 +4. In the list of available chart repositories (scroll to the bottom), select the **new OCI repository**.
421 +5. Choose the chart version you want to deploy (same or newer).
422 +6. Click **Upgrade**.
423 +
424 +After this upgrade:
425 +- Your application is now linked to the **new OCI repository**.
426 +- Rancher will show upgrade notifications only for versions available in the new repo.
427 +
428 +---
429 +
430 +### 4. Re-enable the Old Repository (Optional)
433 433  If you still need the old repo for other apps, re-enable it after the migration steps above.
434 -**Note:** Even if a newer chart version exists in the old repository, your migrated app **will not see it**, because it is no longer connected to that repo
435 435  
436 -##
437 -If you want to move an app back to the old repository:##
433 +> Note: Even if a newer chart version exists in the old repository, your migrated app **will not see it**, because it is no longer connected to that repo.
438 438  
435 +---
436 +
437 +## Reverting the Migration (If Needed)
438 +If you want to move an app back to the old repository:
439 439  1. Temporarily disable the new OCI repo.
440 -1. Enable the old ChartMuseum repo.
441 -1. Open the application → **Upgrade**.
442 -1. Select the chart from the old repo.
443 -1. Save.
440 +2. Enable the old ChartMuseum repo.
441 +3. Open the application → **Upgrade**.
442 +4. Select the chart from the old repo.
443 +5. Save.
444 444  
445 445  This will reconnect the app to the old repository.
446 446  
447 -=
448 -Automated deployments with Jenkins =
447 +---
449 449  
449 +## Summary
450 +- Add new OCI repo → disable old repo → upgrade apps → reconnect to OCI repo.
451 +- After upgrade, apps no longer track versions from the old repository.
452 +- Old repository will stop functioning after ChartMuseum shutdown, so migration is required.
453 +
454 +---
455 +
456 +If you want, I can also generate:
457 +- a shorter version (1-pager),
458 +- a diagram,
459 +- a Rancher UI screenshot guide,
460 +- or a version tailored for your team’s internal wiki.
461 +
462 +
463 += Automated deployments with Jenkins =
464 +
450 450  In this section, we describe(% style="color:#172b4d" %) how to set-up **automated builds, tests and deployments** for Jenkins.
451 451  
452 452  == Prerequisites ==
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