Error When Creating "Deployment. Yaml": Deployment in Version "V1" Cannot Be Handled as a Deployment
I Am New to Devops. I Wrote a Deployment. Yaml File for a Kubernetes Cluster I Just Created on Digital Oceans. Creating the Deployment Keeps Bringing up Errors...
I am new to DevOps. I wrote a deployment.yaml file for a Kubernetes cluster I just created on Digital Oceans. Creating the deployment keeps bringing up errors that I can't decode for now. This is just a test deployment in preparation for the migration of my company's web apps to kubernetes.
I tried editing the content of the deployment to look like conventional examples I've found. I can't even get this simple example to work. You may find the deployment.yaml content below.
---
kind: Deployment
apiVersion: apps/v1
metadata:
name: testit-01-deployment
spec:
replicas: 4
#number of replicas generated
selector:
#assigns labels to the pods for future selection
matchLabels:
app: testit
version: v01
template:
metadata:
Labels:
app: testit
version: v01
spec:
containers:
-name: testit-container
image: teejayfamo/testit
ports:
-containerPort: 80
I ran this line on cmd in the folder container:
kubectl apply -f deployment.yaml --validate=false
Error from server (BadRequest): error when creating "deployment.yaml": Deployment in version "v1" cannot be handled as a Deployment: v1.Deployment.Spec: v1.DeploymentSpec.Template: v1.PodTemplateSpec.Spec: v1.PodSpec.Containers: []v1.Container: decode slice: expect [ or n, but found {, error found in #10 byte of ...|tainers":{"-name":"t|..., bigger context ...|:"testit","version":"v01"}},"spec":{"containers":{"-name":"testit-container","image":"teejayfamo/tes|...
I couldn't even get any information on this from my search. I can't just get the deployment created. Pls, who understands and can put me through?
4 Answers
Since this is the top result of the search, I thought I should add another case when this can occur. In my case, it was coming because there was no double quote on numeric env. var. Log did provide a subtle hint, but it was not very helpful.
Log
..., bigger context ...|c-server-service"},{"name":"SERVER_PORT","value":80}]
Env variable - the value of SERVER_PORT needs to be in double quote.
env:
- name: SERVER_HOST
value: grpc-server-service
- name: SERVER_PORT
value: "80"
Kubernetes issue for reference.
There are syntax errors in your yaml file.
This should work.
---
kind: Deployment
apiVersion: apps/v1
metadata:
name: testit-01-deployment
spec:
replicas: 4
#number of replicas generated
selector:
#assigns labels to the pods for future selection
matchLabels:
app: testit
version: v01
template:
metadata:
labels:
app: testit
version: v01
spec:
containers:
- name: testit-container
image: teejayfamo/testit
ports:
- containerPort: 80
The problem was:
Labelsshould belabels- The syntax of
- name:and- containerPortwere not formatted properly inspec.containerssection.
Hope this helps.
In short -> Syntax Error
The mistake I was doing:
ports:
-containerPort: 8081
the above snippet causing the following error:
Error from server (BadRequest): error when creating ".\\deployment.yml": Deployment in version "v1" cannot be handled as a Deployment: json: cannot unmarshal object into Go struct field Container.spec.template.spec.containers.ports of type []v1.ContainerPort
And this is how I corrected:
ports:
- containerPort: 8081
so the difference was
-containerPort (wrong one) and - containerPort (correct one).
Just to add, in my case, I turned up this result, but ultimately, the problem I had was that I had defined the same environment variable twice
Example:
...
env:
- name: FOO
value: "bar"
- name: FOO
value: "bar"
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