My requirement is to start a pod when a particular batch job is completed.
Batch job yaml file
apiVersion: batch/v1
kind: Job
metadata:
name: topics
spec:
ttlSecondsAfterFinished: 100
template:
metadata:
labels:
app: topics
spec:
containers:
- env:
name: topics
image: confluentinc/cp-kafka:5.3.0
command:
- sh
- -c
- {{.Values.KafkaTopics}}
2 Deployment yaml
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: opp
spec:
replicas: 1
strategy: {}
template:
metadata:
labels:
app: opp
initContainers:
- name: init
image: busybox
command: ['sh', '-c', 'until nc -z someservice:8093; do echo waiting for init; sleep 2; done;']Init container fine when I am checking for some service to be up. Not able to figure it out for batch job.
start a pod
What you have described with a Deployment is a deployment of a service, not only starting a pod.
when a particular batch job is completed.
If you want to watch Kubernetes objects and do actions depending on change of status of a particular object, you need to interact with the Kubernetes API server.
Use a Kubernetes client
The easiest way to interact with the Kubernetes API, especially for watch is to use a pre-built client, e.g. client-go or kubernetes-client Java.
Use the Kubernetes REST API
Alternatively you can use the Kubernetes REST API directly.
API Authentication and Authorization
Beware that you should use a Service Account for authentication and set properly RBAC rules for authorization.
An alternative solution, since your Job hints that you are using Kafka. Your Job could publish an event on Kafka, and you can have a Kafka Consumer to subscribe and act upon those events. But if the consumer should deploy a service on an event, it also need an Service Account to interact with the Kubernetes API server.