Gitlab CI - K8s - Deployment - kubernetes

Question

just going through this guide on gitlab and k8s gitlab-k8s-cd, but my build keeps failing on this part:
- kubectl delete secret registry.gitlab.com
- kubectl create secret docker-registry registry.gitlab.com --docker-server=https://registry.gitlab.com --docker-username=<my_username> --docker-password=$REGISTRY_PASSWD --docker-email=<my_email>
Although I am not entirely sure what password is needed for --docker-password, I have created an API token in gitlab for my user and I am using that in the secure variables.
This is the error:
$ gcloud container clusters get-credentials deployment
Fetching cluster endpoint and auth data.
kubeconfig entry generated for deployment.
$ kubectl delete secret registry.gitlab.com
Error from server: secrets "registry.gitlab.com" not found
ERROR: Build failed: exit code 1
Any help would be much appreciated thanks.
EDIT
Since the initial post, by removing the initial kubectl delete secret and re-building worked, so it was failing on deleting when there was no previous secret.
Second Edit
Having problems with my deployment.yml for K8s, could anyone shed any light on why I am getting this error:
error validating "deployment.yml": error validating data: field spec.template.spec.containers[0].ports[0]: expected object of type map[string]interface{},
With this yml:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: <app>
spec:
replicas: 2
template:
metadata:
labels:
app: <app>
spec:
containers:
- name: deployment
image: registry.gitlab.com/<username>/<app>
imagePullPolicy: Always
ports:
- "80:8080"
env:
- name: PORT
value: "8080"
imagePullSecrets:
- name: registry.gitlab.com
And this error:
error validating "deployment.yml": error validating data: found invalid field imagePullSecrets for v1.Container; if you choose to ignore these errors, turn validation off with --validate=false
With this yml:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: <app>
spec:
replicas: 2
template:
metadata:
labels:
app: <app>
spec:
containers:
- name: <app>
image: registry.gitlab.com/<project>/<app>
imagePullPolicy: Always
ports:
- "80:8080"
env:
- name: PORT
value: "8080"
imagePullSecrets:
- name: registry.gitlab.com
Latest YAML
apiVersion: v1
kind: Service
metadata:
name: <app_name>
labels:
app: <app_name>
spec:
ports:
- port: 80
selector:
app: <app_name>
tier: frontend
type: LoadBalancer
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: <app_name>
labels:
app: <app_name>
spec:
strategy:
type: Recreate
template:
metadata:
labels:
app: <app_name>
tier: frontend
spec:
containers:
- image: registry.gitlab.com/<project>/<app>
imagePullPolicy: Always
name: <app_name>
env:
- name: PORT
value: "8080"
imagePullSecrets:
- name: registry.gitlab.com
ports:
- containerPort: 8080
hostPort: 80

Answer 1

Regarding your first error:
Ports are defined differently in Kubernetes than in Docker or Docker Compose. This is how the port specification should look like:
ports:
- containerPort: 8080
hostPort: 80
See the reference for more information.
Regarding your second error:
According to the reference on PodSpecs, the imagePullSecrets property is correctly placed in your example. However, from reading the error message, it seems that you actually included the imagePullSecrets property into the ContainerSpec, not the PodSpec.
The YAML in your question seems to be correct, in this case. Make sure that your actual manifest matches the example from your question and you did not accidentally indented the imagePullSecrets property more than necessary.

Answer 2

This is the working YAML file for K8s:
apiVersion: v1
kind: Service
metadata:
name: <app_name>
labels:
app: <app_name>
spec:
ports:
- port: 80
selector:
app: <app_name>
tier: frontend
type: LoadBalancer
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: <app_name>
labels:
app: <app_name>
spec:
strategy:
type: Recreate
template:
metadata:
labels:
app: <app_name>
tier: frontend
spec:
containers:
- image: registry.gitlab.com/<project>/<app>:latest
imagePullPolicy: Always
name: <app_name>
env:
- name: PORT
value: "8080"
ports:
- containerPort: 8080
hostPort: 80
imagePullSecrets:
- name: registry.gitlab.com
This is the working gitlab-ci file also:
image: docker:latest
services:
- docker:dind
variables:
DOCKER_DRIVER: overlay
stages:
- package
- deploy
docker-build:
stage: package
script:
- docker build -t registry.gitlab.com/<project>/<app> .
- docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN registry.gitlab.com
- docker push registry.gitlab.com/<project>/<app>
k8s-deploy:
image: google/cloud-sdk
stage: deploy
script:
- echo "$GOOGLE_KEY" > key.json
- gcloud auth activate-service-account --key-file key.json
- gcloud config set compute/zone <zone>
- gcloud config set project <project>
- gcloud config set container/use_client_certificate True
- gcloud container clusters get-credentials <container-name>
- kubectl delete secret registry.gitlab.com
- kubectl create secret docker-registry registry.gitlab.com --docker-server=https://registry.gitlab.com --docker-username=<username> --docker-password=$REGISTRY_PASSWD --docker-email=<user-email>
- kubectl apply -f deployment.yml
Just need to work out how to alter the script to allow for rolling back.