crossplane
/
docs
mirror of https://github.com/crossplane/docs.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
docs/content/v1.18/guides/troubleshoot-crossplane.md

459 lines
20 KiB
Markdown
Raw Permalink Blame History

---
title: Troubleshoot Crossplane
weight: 306
---
## Requested Resource Not Found
If you use the Crossplane CLI to install a `Provider` or
`Configuration` (for example, `crossplane xpkg install provider
xpkg.crossplane.io/crossplane-contrib/provider-aws-s3:v1.21.1`) and get `the server
could not find the requested resource` error, more often than not, that's an
indicator that the Crossplane CLI you're using is outdated. In other words
some Crossplane API has been graduated from alpha to beta or stable and the old
plugin isn't aware of this change.
## Resource Status and Conditions
Most Crossplane resources have a `status` section that can represent the current
state of that particular resource. Running `kubectl describe` against a
Crossplane resource will frequently give insightful information about its
condition. For example, to determine the status of a GCP `CloudSQLInstance`
managed resource use `kubectl describe` for the resource.
```shell {copy-lines="1"}
kubectl describe cloudsqlinstance my-db
Status:
Conditions:
Last Transition Time: 2019-09-16T13:46:42Z
Reason: Creating
Status: False
Type: Ready
```
Most Crossplane resources set the `Ready` condition. `Ready` represents the
availability of the resource - whether it's creating, deleting, available,
unavailable, binding, etc.
## Resource Events
Most Crossplane resources emit _events_ when something interesting happens. You
can see the events associated with a resource by running `kubectl describe` -
for example, `kubectl describe cloudsqlinstance my-db`. You can also see all events in a
particular namespace by running `kubectl get events`.
```console
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning CannotConnectToProvider 16s (x4 over 46s) managed/postgresqlserver.database.azure.crossplane.io cannot get referenced ProviderConfig: ProviderConfig.azure.crossplane.io "default" not found
```
> Note that events are namespaced, while many Crossplane resources (XRs, etc)
> are cluster scoped. Crossplane emits events for cluster scoped resources to
> the 'default' namespace.
## Crossplane Logs
The next place to look to get more information or investigate a failure would be
in the Crossplane pod logs, which should be running in the `crossplane-system`
namespace. To get the current Crossplane logs, run the following:
```shell
kubectl -n crossplane-system logs -lapp=crossplane
```
> Note that Crossplane emits few logs by default - events are typically the best
> place to look for information about what Crossplane is doing. You may need to
> restart Crossplane with the `--debug` flag if you can't find what you're
> looking for.
## Provider Logs
Remember that much of Crossplane's functionality is provided by providers. You
can use `kubectl logs` to view provider logs too. By convention, they also emit
few logs by default.
```shell
kubectl -n crossplane-system logs <name-of-provider-pod>
```
All providers maintained by the Crossplane community mirror Crossplane's support
of the `--debug` flag. The easiest way to set flags on a provider is to create a
`DeploymentRuntimeConfig` and reference it from the `Provider`:
```yaml
apiVersion: pkg.crossplane.io/v1beta1
kind: DeploymentRuntimeConfig
metadata:
name: debug-config
spec:
deploymentTemplate:
spec:
selector: {}
template:
spec:
containers:
- name: package-runtime
args:
- --debug
---
apiVersion: pkg.crossplane.io/v1
kind: Provider
metadata:
name: provider-aws
spec:
package: xpkg.crossplane.io/crossplane-contrib/provider-aws:v0.33.0
runtimeConfigRef:
apiVersion: pkg.crossplane.io/v1beta1
kind: DeploymentRuntimeConfig
name: debug-config
```
> Note that a reference to a `DeploymentRuntimeConfig` can be added to an already
> installed `Provider` and it will update its `Deployment` accordingly.
## Compositions and composite resource definition
### General troubleshooting steps
Crossplane and its providers log most error messages to resources' event fields. Whenever your Composite Resources aren't getting provisioned, follow the following steps:
1. Get the events for the root resource using `kubectl describe` or `kubectl get event`
2. If there are errors in the events, address them.
3. If there are no errors, follow its subresources.
`kubectl get <KIND> <NAME> -o=jsonpath='{.spec.resourceRef}{" "}{.spec.resourceRefs}' | jq`
4. Repeat this process for each resource returned.
{{< hint "note" >}}
The rest of this section show you how to debug issues related to compositions without using external tooling.
If you are using ArgoCD or FluxCD with UI, you can visualize object relationships in the UI.
You can also use the `kube-lineage` plugin to visualize object relationships in your terminal.
{{< /hint >}}
### Examples
#### Composition
<!-- vale Google.WordList = NO -->
You deployed an example application using a claim. Kind = `ExampleApp`. Name = `example-application`.
The example application never reaches available state as shown below.
1. View the claim.
```shell
kubectl describe exampleapp example-application
Status:
Conditions:
Last Transition Time: 2022-03-01T22:57:38Z
Reason: Composite resource claim is waiting for composite resource to become Ready
Status: False
Type: Ready
Events: <none>
```
2. If the claim doesn't have errors, inspect the `.spec.resourceRef` field of the claim.
```shell
kubectl get exampleapp example-application -o=jsonpath='{.spec.resourceRef}{" "}{.spec.resourceRefs}' | jq
{
"apiVersion": "awsblueprints.io/v1alpha1",
"kind": "XExampleApp",
"name": "example-application-xqlsz"
}
```
3. In the preceding output, you see the cluster scoped resource for this claim. Kind = `XExampleApp` name = `example-application-xqlsz`
4. View the cluster scoped resource's events.
```shell
kubectl describe xexampleapp example-application-xqlsz
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal PublishConnectionSecret 9s (x2 over 10s) defined/compositeresourcedefinition.apiextensions.crossplane.io Successfully published connection details
Normal SelectComposition 6s (x6 over 11s) defined/compositeresourcedefinition.apiextensions.crossplane.io Successfully selected composition
Warning ComposeResources 6s (x6 over 10s) defined/compositeresourcedefinition.apiextensions.crossplane.io can't render composed resource from resource template at index 3: can't use dry-run create to name composed resource: an empty namespace may not be set during creation
Normal ComposeResources 6s (x6 over 10s) defined/compositeresourcedefinition.apiextensions.crossplane.io Successfully composed resources
```
5. You see errors in the events. it's complaining about not specifying namespace in its compositions. For this particular kind of error, you can get its subresources and check which one isn't created.
```shell
kubectl get xexampleapp example-application-xqlsz -o=jsonpath='{.spec.resourceRef}{" "}{.spec.resourceRefs}' | jq
[
{
"apiVersion": "awsblueprints.io/v1alpha1",
"kind": "XDynamoDBTable",
"name": "example-application-xqlsz-6j9nm"
},
{
"apiVersion": "awsblueprints.io/v1alpha1",
"kind": "XIAMPolicy",
"name": "example-application-xqlsz-lp9wt"
},
{
"apiVersion": "awsblueprints.io/v1alpha1",
"kind": "XIAMPolicy",
"name": "example-application-xqlsz-btwkn"
},
{
"apiVersion": "awsblueprints.io/v1alpha1",
"kind": "IRSA"
}
]
```
6. Notice the last element in the array doesn't have a name. When a resource in composition fails validation, the resource object isn't created and doesn't have a name. For this particular issue, you must specify the namespace for the IRSA resource.
#### Composite resource definition
Debugging Composite Resource Definition (XRD) is like debugging Compositions.
1. Get the XRD
```shell
kubectl get xrd testing.awsblueprints.io
NAME ESTABLISHED OFFERED AGE
testing.awsblueprints.io 66s
```
2. Notice its status it not established. You describe this XRD to get its events.
```shell
kubectl describe xrd testing.awsblueprints.io
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ApplyClusterRoles 3m19s (x3 over 3m19s) rbac/compositeresourcedefinition.apiextensions.crossplane.io Applied RBAC ClusterRoles
Normal RenderCRD 18s (x9 over 3m19s) defined/compositeresourcedefinition.apiextensions.crossplane.io Rendered composite resource CustomResourceDefinition
Warning EstablishComposite 18s (x9 over 3m19s) defined/compositeresourcedefinition.apiextensions.crossplane.io can't apply rendered composite resource CustomResourceDefinition: can't create object: CustomResourceDefinition.apiextensions.k8s.io "testing.awsblueprints.io" is invalid: metadata.name: Invalid value: "testing.awsblueprints.io": must be spec.names.plural+"."+spec.group
```
3. You see in the events that Crossplane can't generate corresponding CRDs for this XRD. In this case, ensure the name is `spec.names.plural+"."+spec.group`
#### Providers
You can use install providers in two ways: `configuration.pkg.crossplane.io` and `provider.pkg.crossplane.io`. You can use either one to install providers with no functional differences to providers themselves.
If you define a `configuration.pkg.crossplane.io` object, Crossplane creates a
`provider.pkg.crossplane.io` object and manages it. Refer to [the Packages documentation]({{<ref "/master/concepts/packages">}})
for more information about Crossplane Packages.
If you are experiencing provider issues, steps below are a good starting point.
1. Check the status of provider object.
```shell
kubectl describe provider.pkg.crossplane.io provider-aws
Status:
Conditions:
Last Transition Time: 2022-08-04T16:19:44Z
Reason: HealthyPackageRevision
Status: True
Type: Healthy
Last Transition Time: 2022-08-04T16:14:29Z
Reason: ActivePackageRevision
Status: True
Type: Installed
Current Identifier: crossplane/provider-aws:v0.29.0
Current Revision: provider-aws-a2e16ca2fc1a
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal InstallPackageRevision 9m49s (x237 over 4d17h) packages/provider.pkg.crossplane.io Successfully installed package revision
```
In the output above you see that this provider is healthy. To get more information about this provider, you can dig deeper. The `Current Revision` field let you know of your next object to look at.
2. When you create a provider object, Crossplane creates a `ProviderRevision` object based on the contents of the OCI image. In this example, you're specifying the OCI image to be `crossplane/provider-aws:v0.29.0`. This image contains a YAML file which defines Kubernetes objects such as Deployment, ServiceAccount, and CRDs.
The `ProviderRevision` object creates resources necessary for a provider to function based on the contents of the YAML file. To inspect what's deployed as part of the provider package, you inspect the ProviderRevision object. The `Current Revision` field above indicates which ProviderRevision object this provider uses.
```shell
kubectl get providerrevision provider-aws-a2e16ca2fc1a
NAME HEALTHY REVISION IMAGE STATE DEP-FOUND DEP-INSTALLED AGE
provider-aws-a2e16ca2fc1a True 1 crossplane/provider-aws:v0.29.0 Active 19d
```
When you describe the object, you find all CRDs managed by this object.
```shell
kubectl describe providerrevision provider-aws-a2e16ca2fc1a
Status:
Controller Ref:
Name: provider-aws-a2e16ca2fc1a
Object Refs:
API Version: apiextensions.k8s.io/v1
Kind: CustomResourceDefinition
Name: natgateways.ec2.aws.crossplane.io
UID: 5c36d1bc-61b8-44f8-bca0-47e368af87a9
....
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal SyncPackage 22m (x369 over 4d18h) packages/providerrevision.pkg.crossplane.io Successfully configured package revision
Normal BindClusterRole 15m (x348 over 4d18h) rbac/providerrevision.pkg.crossplane.io Bound system ClusterRole to provider ServiceAccount
Normal ApplyClusterRoles 15m (x364 over 4d18h) rbac/providerrevision.pkg.crossplane.io Applied RBAC ClusterRoles
```
The event field also indicates any issues that may have occurred during this process.
<!-- vale Google.WordList = YES -->
3. If you don't see any errors in the event field above, you should check if Crossplane provisioned deployments and their status.
```shell
kubectl get deployment -n crossplane-system
NAME READY UP-TO-DATE AVAILABLE AGE
crossplane 1/1 1 1 105d
crossplane-rbac-manager 1/1 1 1 105d
provider-aws-a2e16ca2fc1a 1/1 1 1 19d
kubectl get pods -n crossplane-system
NAME READY STATUS RESTARTS AGE
crossplane-54db688c8d-qng6b 2/2 Running 0 4d19h
crossplane-rbac-manager-5776c9fbf4-wn5rj 1/1 Running 0 4d19h
provider-aws-a2e16ca2fc1a-776769ccbd-4dqml 1/1 Running 0 4d23h
```
If there are any pods failing, check its logs and remedy the problem.
## Pausing Crossplane
Sometimes, for example when you encounter a bug, it can be useful to pause
Crossplane if you want to stop it from actively attempting to manage your
resources. To pause Crossplane without deleting all of its resources, run the
following command to scale down its deployment:
```shell
kubectl -n crossplane-system scale --replicas=0 deployment/crossplane
```
Once you have been able to rectify the problem or smooth things out, you can
unpause Crossplane by scaling its deployment back up:
```shell
kubectl -n crossplane-system scale --replicas=1 deployment/crossplane
```
## Pausing Providers
Providers can also be paused when troubleshooting an issue or orchestrating a
complex migration of resources. Creating and referencing a `DeploymentRuntimeConfig` is
the easiest way to scale down a provider, and the `DeploymentRuntimeConfig` can be
modified or the reference can be removed to scale it back up:
```yaml
apiVersion: pkg.crossplane.io/v1beta1
kind: DeploymentRuntimeConfig
metadata:
name: scale-config
spec:
deploymentTemplate:
spec:
selector: {}
replicas: 0
template: {}
---
apiVersion: pkg.crossplane.io/v1
kind: Provider
metadata:
name: provider-aws
spec:
package: xpkg.crossplane.io/crossplane-contrib/provider-aws:v0.33.0
runtimeConfigRef:
apiVersion: pkg.crossplane.io/v1beta1
kind: DeploymentRuntimeConfig
name: scale-config
```
> Note that a reference to a `DeploymentRuntimeConfig` can be added to an already
> installed `Provider` and it will update its `Deployment` accordingly.
## Deleting When a Resource Hangs
The resources that Crossplane manages will automatically be cleaned up so as not
to leave anything running behind. This is accomplished by using finalizers, but
in certain scenarios the finalizer can prevent the Kubernetes object from
getting deleted.
To deal with this, we essentially want to patch the object to remove its
finalizer, which will then allow it to be deleted completely. Note that this
won't necessarily delete the external resource that Crossplane was managing, so
you will want to go to your cloud provider's console and look there for any
lingering resources to clean up.
In general, a finalizer can be removed from an object with this command:
```shell
kubectl patch <resource-type> <resource-name> -p '{"metadata":{"finalizers": []}}' --type=merge
```
For example, for a `CloudSQLInstance` managed resource (`database.gcp.crossplane.io`) named
`my-db`, you can remove its finalizer with:
```shell
kubectl patch cloudsqlinstance my-db -p '{"metadata":{"finalizers": []}}' --type=merge
```
## Tips, Tricks, and Troubleshooting
In this section we'll cover some common tips, tricks, and troubleshooting steps
for working with Composite Resources. If you're trying to track down why your
Composite Resources aren't working the [Troubleshooting][trouble-ref] page also
has some useful information.
### Troubleshooting Claims and XRs
Crossplane relies heavily on status conditions and events for troubleshooting.
You can see both using `kubectl describe` - for example:
```console
# Describe the PostgreSQLInstance claim named my-db
kubectl describe postgresqlinstance.database.example.org my-db
```
Per Kubernetes convention, Crossplane keeps errors close to the place they
happen. This means that if your claim isn't becoming ready due to an issue with
your `Composition` or with a composed resource you'll need to "follow the
references" to find out why. Your claim will only tell you that the XR isn't
yet ready.
To follow the references:
1. Find your XR by running `kubectl describe` on your claim and looking for its
"Resource Ref" (aka `spec.resourceRef`).
1. Run `kubectl describe` on your XR. This is where you'll find out about issues
with the `Composition` you're using, if any.
1. If there are no issues but your XR doesn't seem to be becoming ready, take a
look for the "Resource Refs" (or `spec.resourceRefs`) to find your composed
resources.
1. Run `kubectl describe` on each referenced composed resource to determine
whether it's ready and what issues, if any, it's encountering.
<!-- Named Links -->
[Requested Resource Not Found]: #requested-resource-not-found
[install Crossplane CLI]: "../getting-started/install-configure"
[Resource Status and Conditions]: #resource-status-and-conditions
[Resource Events]: #resource-events
[Crossplane Logs]: #crossplane-logs
[Provider Logs]: #provider-logs
[Pausing Crossplane]: #pausing-crossplane
[Pausing Providers]: #pausing-providers
[Deleting When a Resource Hangs]: #deleting-when-a-resource-hangs
[Installing Crossplane Package]: #installing-crossplane-package
[Crossplane package]: /master/concepts/packages/
[Handling Crossplane Package Dependency]: #handling-crossplane-package-dependency
[semver spec]: https://github.com/Masterminds/semver#basic-comparisons
Reference in New Issue View Git Blame Copy Permalink