ImageUpdateAutomation v1beta2 API with refactored controller #647
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darkowlzz
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@tun0 you may be interesting in trying this. It addresses your feature request in fluxcd/flux2#3027 . There's a new commit template data field which provides a new update result that include the old and new values. See the new docs for examples of the template that have old and new values after update. |
Looks promising! Will add it to my list of things I still need to do 😬 |
| type TemplateData struct { | ||
| AutomationObject struct { | ||
| Name, Namespace string | ||
| } | ||
| Changed update.ResultV2 | ||
| } | ||
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| // ResultV2 contains the file changes made during the update. It contains | ||
| // details about the exact changes made to the files and the objects in them. It | ||
| // has a nested structure file->objects->changes. | ||
| type ResultV2 struct { | ||
| FileChanges map[string]ObjectChanges | ||
| } |
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Although this actually is:
type TemplateData struct {
AutomationObject struct {
Name, Namespace string
}
Updated update.Result
Changed update.ResultV2
}and
type ResultV2 struct {
ImageResult Result
FileChanges map[string]ObjectChanges
}In order to keep the docs concise and lead users towards using the new type, I have not shown the old Updated field in the TemplateData and the old Result in ResultV2 as embedded.
Their existence ensure that the old templates continue to work, but documenting them would be almost redundant with slight changes. Maybe we can link to the v1beta1 API doc and ask to look there for details about those types.
I think we'll deprecate the old result type eventually. Or we can deprecate them in v1beta2 itself and remove in v1 API.
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I propose we deprecate the old result type in v1beta2 and we keep only v2 in the docs.
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I've added a deprecation note in the spec docs https://github.com/fluxcd/image-automation-controller/blob/refactor/docs/spec/v1beta2/imageupdateautomations.md#message-template .
I think it's difficult to reliably detect its usage and log warnings because the message template may contain .Updated but not necessarily be using the template data. We can use some regex and try to detect it but, I'll wait for some discussion and agreement if we do need to do that.
| If both `.push.refspec` and `.push.branch` are specified, then the reconciler | ||
| will push to both the destinations. This is particularly useful for working with | ||
| Gerrit servers. For more information about this, please refer to the | ||
| [Gerrit](#gerrit) section. | ||
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| **Note:** If both `.push.refspec` and `.push.branch` are essentially equal to | ||
| each other (for e.g.: `.push.refspec: refs/heads/main:refs/heads/main` and | ||
| `.push.branch: main`), then the reconciler might fail with an `already | ||
| up-to-date` error. |
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Unlike in v1beta1 docs for refspec, I have not mentioned the refspec push functionality as a "second push operation" because in go-git, the client can be configured to call a single push to push to a branch + any refspecs specified in the push options. I had this implemented in my initial refactored code which worked with the refspec push tests, but I decided to introduce this change in a separate release in the future to avoid adding more new things to this refactor. It'll also require some changes in pkg/git/go-git to accept the options.
I'd also like to revisit this to change .spec.git.push.refspec to refspecs and accept any number of refspecs as the underlying data type is a list of refspecs and I have not seen any apparent reason to limit it just to one refspec.
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Sharing results of an upgrade test from v1beta1 to v1beta2 API. Before upgrade, I had the following object: apiVersion: image.toolkit.fluxcd.io/v1beta1
kind: ImageUpdateAutomation
metadata:
creationTimestamp: "2024-03-21T16:31:40Z"
finalizers:
- finalizers.fluxcd.io
generation: 1
name: podinfo-update
namespace: default
resourceVersion: "3055784"
uid: 25d426d7-b7b4-4b4d-8b31-0522aa8d5f6e
spec:
git:
checkout:
ref:
branch: main
commit:
author:
email: [email protected]
name: fluxcdbot
interval: 30m
sourceRef:
kind: GitRepository
name: podinfo
update:
strategy: Setters
status:
conditions:
- lastTransitionTime: "2024-03-21T16:31:40Z"
message: no updates made; last commit 62b92bf at 2024-03-21T22:01:42+05:30
reason: ReconciliationSucceeded
status: "True"
type: Ready
lastAutomationRunTime: "2024-03-21T16:31:42Z"
lastPushCommit: 62b92bfe37b7dfa97d3870b29db211f2145917fd
lastPushTime: "2024-03-21T16:31:42Z"
observedGeneration: 1After installing the new CRD for v1beta2 API and running the new controller, the object becomes: apiVersion: image.toolkit.fluxcd.io/v1beta2
kind: ImageUpdateAutomation
metadata:
creationTimestamp: "2024-03-21T16:31:40Z"
finalizers:
- finalizers.fluxcd.io
generation: 1
name: podinfo-update
namespace: default
resourceVersion: "3055965"
uid: 25d426d7-b7b4-4b4d-8b31-0522aa8d5f6e
spec:
git:
checkout:
ref:
branch: main
commit:
author:
email: [email protected]
name: fluxcdbot
interval: 30m
sourceRef:
kind: GitRepository
name: podinfo
update:
strategy: Setters
status:
conditions:
- lastTransitionTime: "2024-03-21T16:33:00Z"
message: repository up-to-date
observedGeneration: 1
reason: Succeeded
status: "True"
type: Ready
lastAutomationRunTime: "2024-03-21T16:33:00Z"
lastPushCommit: 62b92bfe37b7dfa97d3870b29db211f2145917fd
lastPushTime: "2024-03-21T16:31:42Z"
observedGeneration: 1
observedPolicies:
podinfo-policy:
name: ghcr.io/stefanprodan/podinfo
tag: 4.0.6
podinfo-test:
name: ghcr.io/stefanprodan/podinfo
tag: 4.0.0
podinfo-test-1:
name: ghcr.io/stefanprodan/podinfo
tag: 4.0.6
observedSourceRevision: main@sha1:62b92bfe37b7dfa97d3870b29db211f2145917fdJust the status gets updated with new information. |
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Tested it manually in a
Status:
Conditions:
Last Transition Time: 2024-03-28T09:08:22Z
Message: repository up-to-date
Observed Generation: 2
Reason: Succeeded
Status: True
Type: Ready
Last Automation Run Time: 2024-03-28T10:08:23Z
Last Handled Reconcile At: 2024-03-28T10:58:14.243605+01:00
Last Push Commit: f5167f60f1d90eb81ed30eabc7b0e562280cb2ef
Last Push Time: 2024-03-28T10:07:39Z
Observed Generation: 2
Observed Policies:
Backend - Memcached:
Name: registry-1.docker.io/bitnamicharts/memcached
Tag: 7.0.3
Backend - Redis:
Name: registry-1.docker.io/bitnamicharts/redis
Tag: 19.0.1
Frontend - Podinfo:
Name: ghcr.io/stefanprodan/charts/podinfo
Tag: 6.6.1
Observed Source Revision: main@sha1:f5167f60f1d90eb81ed30eabc7b0e562280cb2ef
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Succeeded 11m (x5 over 60m) image-automation-controller repository up-to-date
Normal Succeeded 97s image-automation-controller pushed commit 'be01557' to branch 'main'
Automated image update
Automation name: apps-update/flux-apps
Files:
- backend/base/memcached.yaml
Objects:
- HelmRelease memcached
Changes:
- 7.0.2 -> 7.0.3
Normal Succeeded 96s image-automation-controller pushed commit 'f5167f6' to branch 'main'
Automated image update
Automation name: apps-update/flux-apps
Files:
- frontend/base/podinfo.yaml
Objects:
- HelmRelease podinfo
Changes:
- 6.6.0 -> 6.6.1
Normal Succeeded 51s (x3 over 32m) image-automation-controller no change since last reconciliation |
- Introduce v1beta2 API with the following changes
- Removes SetImageUpdateAutomationReadiness() and
GetStatusConditions().
- Introduce new status fields in the API ObservedPolicies and
ObservedSourceRevision.
- Introduce new status condition reasons for use in the new
reconciliation model with v1beta2 API.
Signed-off-by: Sunny <[email protected]>
Move all the common test utilities that are needed for testing different packages into a common testutil package. Modify the test helpers to be more generic to be reusable. Signed-off-by: Sunny <[email protected]>
Move the policy applying code to a separate package so that it can be tested and maintained independent of the other components, and imported to other packages where needed. Signed-off-by: Sunny <[email protected]>
Move all the Git source management code into a new package and introduce abstractions to manage the source as per the needs of image update automation. A new type, SourceManager, is introduced which configures and manages the source. It provides methods to perform relevant actions on the source and also the ability to customize those actions. It also introduces PushResult which contains the information about the changes that were pushed. It can be used to gather information about the pushed commit and get a summary of the operation. All the source related operations are tested in this package, independent of the reconciler. The tests from the controller e2e tests have been rewritten in terms of source manager, making the tests focused and simpler. The source change commit operation uses the new ResultV2 update result which includes the old and new strings that are part of the update. The previous Result type is still available to use. Signed-off-by: Sunny <[email protected]>
Since the reconciler is being completely rewritten, remove the old controller file. A new controller file with the new implemementation will be added in the following commit. Signed-off-by: Sunny <[email protected]>
Introduce the rewritten reconciler which uses v1beta2 API and the new internal/policy and internal/source packages for performing all the operations. The reconciliation model is written similar to the other flux controller, with simplified events and logs, and kstatus support. The reconciliation result computation similar to image-reflector-controller, using the same reconciler helpers from pkg/runtime repo. With the new status fields ObservedPolicies and ObservedSourceRevision, the reconciler now avoid full sync of the source which involves cloning the source every time. If the policies and the remote source have not changed since the last reconciliation, the reconciliation is returned early without cloning and apply the updates. This is only applicable when the checkout branch and the push branch are the same. For a different push branch and refspec, full sync is always performed as before. Notifications are now only sent when there's something new to inform about. If there is no change, an source up-to-date notification is sent. When there's an update, the details about the pushed commit with any rendered commit template is send. When there's a failure, the error is sent in the notification. And when there's an error recovery, a success notification is sent to rely that the automation has recovered. Signed-off-by: Sunny <[email protected]>
Rewrite the controller tests to test the new behavior of the reconciler and also simplify the tests for scenarios that are now being tests in internal/source package, especially the git operations related tests. Some of the old controller tests are still kept to ensure those functionalities continue to work after the controller rewrite, even if some of them are redundant. They can be removed in the future for the tests in the respective subpackages, internal/policy and internal/source. New tests that focus the status conditions and notifications have been added for various possible scenarios. The test helpers have been modified to simplify their usage and some have been replaced with their equivalent version from the testutils package. Signed-off-by: Sunny <[email protected]>
Signed-off-by: Sunny <[email protected]>
Signed-off-by: Sunny <[email protected]>
…elector Signed-off-by: Maxim Samoilov <[email protected]>
This change refactors image-automation-controller to implement the new unified standards of flux controllers.
See #643 for some overview of the new changes.
Following are some highlights of the changes:
.observedPoliciesand.observedSourceRevisionrequired for the new reconciliation model, and a spec field.policySelectorfor selecting the policies to consider in the update operation.internal/sourcepackage tests.internal/sourcepackage which provides all the source management API. These source management operations are tested in detail independent of the reconciler..Changed. The previous update Result remains available under.Updatedbut is deprecated. ResultV2 contains all the updates, even if the update wasn't a complete image but part of an image.internal/policypackage to be maintained and tested independent of the reconciler and can be used reconciler and source manager tests as needed.Example ImageUpdateAutomation status with the new fields:
Example rendered commit template with before and after update values per file and per object:
Instructions for testing
To test this, checkout this branch and build the container image with
make docker-build IMG=<image-name> TAG=<tag>. Before deploying the container image, update/install the CRDs to v1beta2 API withmake installor apply the CRD manifests inconfig/crd/bases. Create git repository, image repository, policy and update automation object and test.Fixes #437