As soon as I add,
spec:
containers:
- args:
- /bin/sh
- '-c'
- touch /tmp/healthy; touch /tmp/liveness
env:
to the deployment file, the application is not coming up without any error in the description logs. The deployment succeed, but no output. Both files getting created in the container. Can I run docker build inside kubernetes deployment?
Below is the complete deployment yaml.
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: web
name: web
namespace: default
spec:
replicas: 1
selector:
matchLabels:
app: web
version: prod
template:
metadata:
annotations:
prometheus.io/scrape: 'true'
labels:
app: web
version: prod
spec:
containers:
- args:
- /bin/sh
- '-c'
- >-
touch /tmp/healthy; touch /tmp/liveness; while true; do echo .;
sleep 1; done
env:
- name: SUCCESS_RATE
valueFrom:
configMapKeyRef:
key: SUCCESS_RATE
name: web-config-prod
image: busybox
livenessProbe:
exec:
command:
- cat
- /tmp/liveness
initialDelaySeconds: 5
name: web
ports:
- containerPort: 8080
- containerPort: 8000The problem was in your case is container is not found after finishing it's task. You told to execute a shell script to your conatainer. And after doing that the container is finished. That's why you can't see whether the files were created or not. Also it didn't put any logs. So you need to keep alive the container after creating the files. You can do that by putting a infinite while loop. Here it comes:
apiVersion: apps/v1
kind: Deployment
metadata:
name: hello
labels:
app: hi
spec:
replicas: 1
selector:
matchLabels:
app: hi
template:
metadata:
labels:
app: hi
spec:
containers:
- name: hi
image: busybox
args:
- /bin/sh
- "-c"
- "touch /tmp/healthy; touch /tmp/liveness; while true; do echo .; sleep 1; done"
ports:
- containerPort: 80Save it to hello-deployment.yaml and run,
$ kubectl create -f hello-deployment.yaml
$ pod_name=$(kubectl get pods -l app=hi -o jsonpath='{.items[0].metadata.name}')
$ kubectl logs -f $pod_name
$ kubectl exec -it -f $pod_name -- ls /tmp