Troubleshooting

The following is a list of common error messages and potential troubleshooting suggestions that might assist you with your work.

No endpoints available for service “spin-operator-webhook-service”

When following the quickstart guide the following error can occur when running the kubectl apply -f https://github.com/spinkube/spin-operator/releases/download/v0.1.0/spin-operator.shim-executor.yaml command:

Error from server (InternalError): error when creating "https://github.com/spinkube/spin-operator/releases/download/v0.1.0/spin-operator.shim-executor.yaml": Internal error occurred: failed calling webhook "mspinappexecutor.kb.io": failed to call webhook: Post "https://spin-operator-webhook-service.spin-operator.svc:443/mutate-core-spinoperator-dev-v1alpha1-spinappexecutor?timeout=10s": no endpoints available for service "spin-operator-webhook-service"

To address the error above, first look to see if Spin Operator is running:

get pods -n spin-operator
NAME                                                READY   STATUS              RESTARTS   AGE
spin-operator-controller-manager-5bdcdf577f-htshb   0/2     ContainerCreating   0          26m

If the above result (ready 0/2) is returned, then use the name from the above result to kubectl describe pod of the spin-operator:

kubectl describe pod spin-operator-controller-manager-5bdcdf577f-htshb -n spin-operator

If the above command’s response includes the message SetUp failed for volume "cert" : secret "webhook-server-cert" not found, please check the certificate. The spin operator requires this certificate to serve webhooks, and the missing certificate could be one reason why the spin operator is failing to start.

The command to check the certificate and the desired output is as follows:

kubectl get certificate -n spin-operator
NAME                         READY   SECRET                AGE
spin-operator-serving-cert   True    webhook-server-cert   11m

Instead of the desired output shown above you may be getting the No resources found in spin-operator namespace. response from the command. For example:

kubectl get certificate -n spin-operator
No resources found in spin-operator namespace.

To resolve this issue, please try to install the Spin Operator again. Except this time, use the helm upgrade --install syntax instead of just helm install:

helm upgrade --install spin-operator \
  --namespace spin-operator \
  --create-namespace \
  --version 0.1.0 \
  --wait \
  oci://ghcr.io/spinkube/charts/spin-operator

Once the Spin Operator is installed you can try and run the kubectl apply -f https://github.com/spinkube/spin-operator/releases/download/v0.1.0/spin-operator.shim-executor.yaml command again. The issue should be resolved now.

Error Validating Data: Connection Refused

When trying to run the kubectl apply -f <URL> command (for example installing the cert-manager etc.) you may encounter an error similar to the following:

$ kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.14.3/cert-manager.yaml

error: error validating "https://github.com/cert-manager/cert-manager/releases/download/v1.14.3/cert-manager.yaml": error validating data: failed to download openapi: Get "https://127.0.0.1:6443/openapi/v2?timeout=32s": dial tcp 127.0.0.1:6443: connect: connection refused; if you choose to ignore these errors, turn validation off with --validate=false

This is because no cluster exists. You can create a cluster using the k3d command or install and configure a client like Rancher Desktop or Docker Desktop to manage Kubernetes clusters on your behalf.

Installation Failed

When trying to install a new version of a chart you may get the following error:

Error: INSTALLATION FAILED: cannot re-use a name that is still in use

For example, if you have installed v0.14.0 of kwasm-operator using the following helm install command:

helm install \
  kwasm-operator kwasm/kwasm-operator \
  --namespace kwasm \
  --create-namespace \
  --set kwasmOperator.installerImage=ghcr.io/spinkube/containerd-shim-spin/node-installer:v0.14.0

Reissuing the above command with the new version v0.14.1 will result in the following error - Error: INSTALLATION FAILED: cannot re-use a name that is still in use. To use the same command when installing and upgrading a release, use upgrade --install (as referenced here in the official Helm documentation). For example:

helm upgrade --install \
  kwasm-operator kwasm/kwasm-operator \
  --namespace kwasm \
  --create-namespace \
  --set kwasmOperator.installerImage=ghcr.io/spinkube/containerd-shim-spin/node-installer:v0.14.1

Cluster Already Exists

When trying to create a cluster (e.g. a cluster named wasm-cluster) you may receive an error message similar to the following:

FATA[0000] Failed to create cluster 'wasm-cluster' because a cluster with that name already exists

Cluster Information

With k3d installed, you can use the following command to get a cluster list:

$ k3d cluster list
NAME           SERVERS   AGENTS   LOADBALANCER
wasm-cluster   1/1       2/2      true

With `kubectl installed, you can use the following command to dump cluster information (this is much more verbose):

kubectl cluster-info dump

Cluster Delete

With k3d installed, you can delete the cluster by name, as shown in the command below:

$ k3d cluster delete wasm-cluster
INFO[0000] Deleting cluster 'wasm-cluster'
INFO[0002] Deleting cluster network 'k3d-wasm-cluster'
INFO[0002] Deleting 1 attached volumes...
INFO[0002] Removing cluster details from default kubeconfig...
INFO[0002] Removing standalone kubeconfig file (if there is one)...
INFO[0002] Successfully deleted cluster wasm-cluster!

Too long: must have at most 262144 bytes

When running kubectl apply -f my-file.yaml, the following error can occur if the yaml file is too large:

Too long: must have at most 262144 bytes

Using the --server-side=true option resolves this issue:

kubectl apply --server-side=true -f my-file.yaml

Redis Operator

Noted an error when installing Redis Operator:

$ helm repo add redis-operator https://spotahome.github.io/redis-operator
"redis-operator" has been added to your repositories
$ helm repo update
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "redis-operator" chart repository
Update Complete. ⎈Happy Helming!⎈
$ helm install redis-operator redis-operator/redis-operator
Error: INSTALLATION FAILED: failed to install CRD crds/databases.spotahome.com_redisfailovers.yaml: error parsing : error converting YAML to JSON: yaml: line 4: did not find expected node content

Used the following commands to enforce using a different version of Redis Operator (whilst waiting on this PR fix to be merged).

$ helm install redis-operator redis-operator/redis-operator --version 3.2.9
NAME: redis-operator
LAST DEPLOYED: Mon Jan 22 12:33:54 2024
NAMESPACE: default
STATUS: deployed
REVISION: 1
TEST SUITE: None

error: requires go version

When building apps like the cpu-load-gen Spin app, you may get the following error if your TinyGo is not up to date. The error requires go version 1.18 through 1.20 but this is not necessarily the case. It is recommended that you have the latest go installed e.g. 1.21 and downgrading is unnecessary. Instead please go ahead and install the latest version of TinyGo to resolve this error:

user@user:~/spin-operator/apps/cpu-load-gen$ spin build
Building component cpu-load-gen with `tinygo build -target=wasi -gc=leaking -no-debug -o main.wasm main.go`
error: requires go version 1.18 through 1.20, got go1.21