feat(WebhookProvider): Let WebhookProvider return `SoftError` on response status codes >= 500 #4319

SimonKienzler · 2024-03-14T16:39:50Z

Description

#4166 introduced the SoftError as a way for providers to signal that an error is transient and should not lead to the controller bailing out of execution, to somewhat mitigate the changes made in #3009.

For some in-tree providers (AWS, Azure, and Oracle Cloud Infrastructure), SoftError support has already been implemented. This PR lets the WebhookProvider return SoftErrors for any HTTP Response with a status code >= 500 returned by webhook providers, in order to implement this for out-of-tree providers as well.

As 5xx status codes indicate a temporary problem on the provider side, it seems fitting to me that any response with such a code should be handled as a SoftError. This is in line with the definition of the SoftError, which "is meant for error propagation from providers to tell that this is a transient error." It is also in line with the webhook provider tutorial, which states that

only 5xx responses will be retried and only 20x will be considered as successful. All status codes different from those will be considered a failure on ExternalDNS's side.

This is my first PR here, happy about any feedback regarding the overall contribution process as well 😊

Checklist

Unit tests updated
End user documentation updated
- I wasn't sure if any user documentation needed updates, please advise if and where I should add something.

linux-foundation-easycla · 2024-03-14T16:39:54Z

The committers listed above are authorized under a signed CLA.

✅ login: SimonKienzler / name: Simon Kienzler (e8e5d5c, a88cae2)

k8s-ci-robot · 2024-03-14T16:39:59Z

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mloiseleur · 2024-03-18T08:10:39Z

/ok-to-test

mloiseleur · 2024-03-19T07:40:54Z

provider/webhook/webhook.go

@@ -224,7 +229,11 @@ func (p WebhookProvider) ApplyChanges(ctx context.Context, changes *plan.Changes
 	if resp.StatusCode != http.StatusNoContent {
 		applyChangesErrorsGauge.Inc()
 		log.Debugf("Failed to apply changes with code %d", resp.StatusCode)
-		return fmt.Errorf("failed to apply changes with code %d", resp.StatusCode)
+		err := fmt.Errorf("failed to apply changes with code %d", resp.StatusCode)
+		if resp.StatusCode >= http.StatusInternalServerError {


Suggested change

if resp.StatusCode >= http.StatusInternalServerError {

if resp.StatusCode >= http.StatusInternalServerError && resp.StatusCode <= http.StatusNotExtended {

I like the suggestion. IMO, the check should be consistent across all three interface functions, therefore I extracted it into a small function for convenience. WDYT?

Sounds good to me. Thanks.

mloiseleur · 2024-03-19T07:41:57Z

The PR looks technically good. I left a small suggestion.
I'm unsure if we should do it for all changes.
/lgtm
/assign @szuecs for final review

mloiseleur · 2024-03-22T13:59:04Z

/lgtm

szuecs · 2024-04-08T17:37:34Z

provider/webhook/webhook.go

 	}

 	if err := json.NewDecoder(resp.Body).Decode(&endpoints); err != nil {
-		recordsErrorsGauge.Inc()
+		adjustEndpointsErrorsGauge.Inc()


this seems to be an unrelated fix, maybe better to create a separate PR

@SimonKienzler ^

I thought it might pass as boyscouting, will open a separate PR for it.

Reverted the change and will open a separate PR for the fix soon. PTAL

szuecs · 2024-04-09T17:33:42Z

/lgtm
/approve

k8s-ci-robot · 2024-04-09T17:33:52Z

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: szuecs

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…rnal-dns to v0.14.2@3fcad62 by renovate (#22163) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [registry.k8s.io/external-dns/external-dns](https://togithub.com/kubernetes-sigs/external-dns) | patch | `v0.14.1` -> `v0.14.2` | --- > [!WARNING] > Some dependencies could not be looked up. Check the Dependency Dashboard for more information. --- ### Release Notes <details> <summary>kubernetes-sigs/external-dns (registry.k8s.io/external-dns/external-dns)</summary> ### [`v0.14.2`](https://togithub.com/kubernetes-sigs/external-dns/releases/tag/v0.14.2) [Compare Source](https://togithub.com/kubernetes-sigs/external-dns/compare/v0.14.1...v0.14.2) #### What's Changed - kustomize-v0.14.1 by [@Raffo](https://togithub.com/Raffo) in [kubernetes-sigs/external-dns#4331 - replace all links in tutorials for v0.14.1 by [@Raffo](https://togithub.com/Raffo) in [kubernetes-sigs/external-dns#4332 - chore: upgrade ExternalDNS to go 1.22 by [@mloiseleur](https://togithub.com/mloiseleur) in [kubernetes-sigs/external-dns#4318 - build(deps): bump the dev-dependencies group with 13 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4329 - build(deps): bump the dev-dependencies group with 5 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4334 - build(deps): bump the dev-dependencies group with 9 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4349 - build(deps): bump the dev-dependencies group with 1 update by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4341 - Add `dnsendpoint` CRD to Helm chart by [@onedr0p](https://togithub.com/onedr0p) in [kubernetes-sigs/external-dns#4322 - build(deps): bump the dev-dependencies group with 13 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4361 - build(deps): bump GrantBirki/json-yaml-validate from 2.6.1 to 2.6.2 in the dev-dependencies group by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4364 - chore(chart): Released chart for v0.14.1 by [@stevehipwell](https://togithub.com/stevehipwell) in [kubernetes-sigs/external-dns#4357 - chore: alphabetical order on providers by [@mloiseleur](https://togithub.com/mloiseleur) in [kubernetes-sigs/external-dns#4350 - doc: advertise current plan on providers by [@mloiseleur](https://togithub.com/mloiseleur) in [kubernetes-sigs/external-dns#4365 - Fix(ipv6): support ipv6 shortener and expander equal by [@dongjiang1989](https://togithub.com/dongjiang1989) in [kubernetes-sigs/external-dns#4351 - feat(WebhookProvider): Let WebhookProvider return `SoftError` on response status codes >= 500 by [@SimonKienzler](https://togithub.com/SimonKienzler) in [kubernetes-sigs/external-dns#4319 - Webhook provider: Use correct error gauge in `AdjustEndpoints()` func by [@SimonKienzler](https://togithub.com/SimonKienzler) in [kubernetes-sigs/external-dns#4374 - build(deps): bump the dev-dependencies group with 18 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4381 - Add exclude domains value in Chart by [@bford-evs](https://togithub.com/bford-evs) in [kubernetes-sigs/external-dns#4380 - docs(aws): fix typo and upgrade cleanup flow by [@franzudev](https://togithub.com/franzudev) in [kubernetes-sigs/external-dns#4389 - docs(gke): detail how to configure workload identity by [@userbradley](https://togithub.com/userbradley) in [kubernetes-sigs/external-dns#4373 - chore(ci): fix failing test by [@mloiseleur](https://togithub.com/mloiseleur) in [kubernetes-sigs/external-dns#4397 - chore: Update controller-tools version to v0.14.0 by [@dongjiang1989](https://togithub.com/dongjiang1989) in [kubernetes-sigs/external-dns#4400 - chore(ci): update golangci-lint to v1.57.2 by [@dongjiang1989](https://togithub.com/dongjiang1989) in [kubernetes-sigs/external-dns#4406 - chore: upgrade ExternalDNS to go 1.22.2 by [@mloiseleur](https://togithub.com/mloiseleur) in [kubernetes-sigs/external-dns#4414 - build(deps): bump the dev-dependencies group across 1 directory with 4 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4412 - build(deps): bump the dev-dependencies group across 1 directory with 24 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4416 - custom Azure Active Directory Authority Host by [@Jeremy-Boyle](https://togithub.com/Jeremy-Boyle) in [kubernetes-sigs/external-dns#4210 - feat(DNSimple): User API tokens by [@IntegralProgrammer](https://togithub.com/IntegralProgrammer) in [kubernetes-sigs/external-dns#4274 - docs: annotation placement for azuredns tutorial by [@jonas-budde](https://togithub.com/jonas-budde) in [kubernetes-sigs/external-dns#4415 - feat(azure): add zone name filter for Azure Private DNS by [@khuedoan](https://togithub.com/khuedoan) in [kubernetes-sigs/external-dns#4346 - test: detect no change necessary with provider specific config by [@szuecs](https://togithub.com/szuecs) in [kubernetes-sigs/external-dns#4189 - docs: add setup example with helm chart on some providers by [@omerap12](https://togithub.com/omerap12) in [kubernetes-sigs/external-dns#4405 - test: controller run() and successfully shutdown by [@szuecs](https://togithub.com/szuecs) in [kubernetes-sigs/external-dns#3639 - fix syntax on cloudflare externalDNS by [@ilyesAj](https://togithub.com/ilyesAj) in [kubernetes-sigs/external-dns#4436 - build(deps): bump the dev-dependencies group across 1 directory with 11 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4440 - chore(chart): Adding extra containers by [@omerap12](https://togithub.com/omerap12) in [kubernetes-sigs/external-dns#4432 - aws: add ca-west-1 region by [@jeremy-albuixech](https://togithub.com/jeremy-albuixech) in [kubernetes-sigs/external-dns#4444 - fix: duplicated endpoint per hosted zone by [@leonardocaylent](https://togithub.com/leonardocaylent) in [kubernetes-sigs/external-dns#4296 - build(deps): bump actions/checkout from 4.1.4 to 4.1.5 in the dev-dependencies group by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4438 - Add IPv6 AAAA record support to PiHole provider by [@PseudoResonance](https://togithub.com/PseudoResonance) in [kubernetes-sigs/external-dns#4324 - fix: soft error on cloudflare rate limits by [@ebachle](https://togithub.com/ebachle) in [kubernetes-sigs/external-dns#4437 - Update cloudflare.md by [@mfreeman451](https://togithub.com/mfreeman451) in [kubernetes-sigs/external-dns#4449 - Fix headings, whitespace by [@stefanlasiewski](https://togithub.com/stefanlasiewski) in [kubernetes-sigs/external-dns#4457 - docs: add reference to anexia webhook provider by [@ProbstenHias](https://togithub.com/ProbstenHias) in [kubernetes-sigs/external-dns#4441 - fix logline mentioning plugin api by [@Raffo](https://togithub.com/Raffo) in [kubernetes-sigs/external-dns#4459 - docs: lint gke docs + make terraform config more secure by [@DrFaust92](https://togithub.com/DrFaust92) in [kubernetes-sigs/external-dns#4456 - build(deps): bump action-stars/install-tool-from-github-release from 0.2.2 to 0.2.3 in the dev-dependencies group by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4464 - changed documentation to include more details description when using API Tokens by [@rhjensen79](https://togithub.com/rhjensen79) in [kubernetes-sigs/external-dns#4474 - fix: add clarification to endpoint unit tests by [@leonardocaylent](https://togithub.com/leonardocaylent) in [kubernetes-sigs/external-dns#4462 - build(deps): bump the dev-dependencies group across 1 directory with 19 updates by [@mloiseleur](https://togithub.com/mloiseleur) in [kubernetes-sigs/external-dns#4476 - build(deps): bump the dev-dependencies group across 1 directory with 19 updates by [@dependabot](https://togithub.com/dependabot) in [kubernetes-sigs/external-dns#4475 #### New Contributors - [@onedr0p](https://togithub.com/onedr0p) made their first contribution in [kubernetes-sigs/external-dns#4322 - [@SimonKienzler](https://togithub.com/SimonKienzler) made their first contribution in [kubernetes-sigs/external-dns#4319 - [@bford-evs](https://togithub.com/bford-evs) made their first contribution in [kubernetes-sigs/external-dns#4380 - [@franzudev](https://togithub.com/franzudev) made their first contribution in [kubernetes-sigs/external-dns#4389 - [@userbradley](https://togithub.com/userbradley) made their first contribution in [kubernetes-sigs/external-dns#4373 - [@Jeremy-Boyle](https://togithub.com/Jeremy-Boyle) made their first contribution in [kubernetes-sigs/external-dns#4210 - [@IntegralProgrammer](https://togithub.com/IntegralProgrammer) made their first contribution in [kubernetes-sigs/external-dns#4274 - [@jonas-budde](https://togithub.com/jonas-budde) made their first contribution in [kubernetes-sigs/external-dns#4415 - [@khuedoan](https://togithub.com/khuedoan) made their first contribution in [kubernetes-sigs/external-dns#4346 - [@omerap12](https://togithub.com/omerap12) made their first contribution in [kubernetes-sigs/external-dns#4405 - [@ilyesAj](https://togithub.com/ilyesAj) made their first contribution in [kubernetes-sigs/external-dns#4436 - [@jeremy-albuixech](https://togithub.com/jeremy-albuixech) made their first contribution in [kubernetes-sigs/external-dns#4444 - [@leonardocaylent](https://togithub.com/leonardocaylent) made their first contribution in [kubernetes-sigs/external-dns#4296 - [@PseudoResonance](https://togithub.com/PseudoResonance) made their first contribution in [kubernetes-sigs/external-dns#4324 - [@ebachle](https://togithub.com/ebachle) made their first contribution in [kubernetes-sigs/external-dns#4437 - [@mfreeman451](https://togithub.com/mfreeman451) made their first contribution in [kubernetes-sigs/external-dns#4449 - [@ProbstenHias](https://togithub.com/ProbstenHias) made their first contribution in [kubernetes-sigs/external-dns#4441 - [@DrFaust92](https://togithub.com/DrFaust92) made their first contribution in [kubernetes-sigs/external-dns#4456 - [@rhjensen79](https://togithub.com/rhjensen79) made their first contribution in [kubernetes-sigs/external-dns#4474 **Full Changelog**: kubernetes-sigs/external-dns@v0.14.1...v0.14.2 </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://togithub.com/renovatebot/renovate).

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busilina mentioned this pull request Mar 18, 2024

Do not return a 500 error when dns zone does not exist. stackitcloud/external-dns-stackit-webhook#16

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SimonKienzler added 2 commits April 9, 2024 13:51

Let the WebhookProvider return SoftError on status codes >= 500

e8e5d5c

Extract check for retryable error into function

a88cae2

SimonKienzler force-pushed the add-softerrors-to-webhook-provider branch from 5343663 to a88cae2 Compare April 9, 2024 11:52

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Webhook provider: Use correct error gauge in AdjustEndpoints() func #4374

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fix: provide possibility to have a soft error mode #4166

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feat(WebhookProvider): Let WebhookProvider return `SoftError` on response status codes >= 500 #4319

feat(WebhookProvider): Let WebhookProvider return `SoftError` on response status codes >= 500 #4319

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	if resp.StatusCode >= http.StatusInternalServerError {
	if resp.StatusCode >= http.StatusInternalServerError && resp.StatusCode <= http.StatusNotExtended {

feat(WebhookProvider): Let WebhookProvider return SoftError on response status codes >= 500 #4319

feat(WebhookProvider): Let WebhookProvider return SoftError on response status codes >= 500 #4319

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feat(WebhookProvider): Let WebhookProvider return `SoftError` on response status codes >= 500 #4319

feat(WebhookProvider): Let WebhookProvider return `SoftError` on response status codes >= 500 #4319

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