kubernetes-deployment

Basically I am trying to do is play around with pod lifecycle and check if we can do some cleanup/backup such as copy logs before the pod terminates. What I need : Copy logs/heapdumps from container to a hostPath/S3 before terminating What I tried: I used a preStop hook with a bash command to echo a message (just to see if it works !!). Used terminationGracePeriodSeconds with a delay to preStop and toggle them to see if the process works. Ex. keep terminationGracePeriodSeconds:30 sec (default) and set preStop command to sleep by 50 sec and the message should not be generated since the

Is there a way to create a tree of inheritance for Kubernetes deployments? I have a number of deployments which are similar but not identical. They share many ENV vars but not all. They all use the same image. For example, I have a dev deployment which is configured almost identical to a production deployment but has env vars pointing to a different database backend. I have a celery deployment which is configured the same as the production deployment, however, it has a different run command. Helm is what many people are using for this. It let's you create templates for kubernetes descriptors

I've gone over the following docomentation page: https://kubernetes.io/docs/concepts/workloads/controllers/deployment/ The example deployment yaml is as follows: apiVersion: apps/v1 kind: Deployment metadata: name: nginx-deployment labels: app: nginx spec: replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:1.7.9 ports: - containerPort: 80 We can see here three different times where the label app: nginx is mentioned. Why do we need each of them? I had a hard time understanding it from the official documentation. The

I'm following that tutorial ( https://www.baeldung.com/spring-boot-minikube ) I want to create Kubernetes deployment in yaml file (simple-crud-dpl.yaml): apiVersion: apps/v1 kind: Deployment metadata: name: simple-crud spec: selector: matchLabels: app: simple-crud replicas: 3 template: metadata: labels: app: simple-crud spec: containers: - name: simple-crud image: simple-crud:latest imagePullPolicy: Never ports: - containerPort: 8080 but when I run kubectl create -f simple-crud-dpl.yaml i got: error: SchemaError(io.k8s.api.autoscaling.v2beta2.MetricTarget): invalid object doesn't have