Create a incremented version of Kubernetes deployment for a microservice by exporting the current version deployment

deploy-service.sh

#!/bin/bash

# This script depends on the "yq" utility: https://github.com/mikefarah/yq

SERVICE_NAME=$1
NEW_IMAGE=$2

LATEST_VERSION=$(kubectl get deployment --selector app=$SERVICE_NAME -o 'jsonpath={.items[*].metadata.labels.version}' | tr " " "\n" | sed 's/^v//' | sort -n -r | tr "\n" " " | cut -d ' ' -f 1)
NEXT_VERSION=$((LATEST_VERSION+1))

kubectl get deployment/${SERVICE_NAME}-v${LATEST_VERSION} -o yaml \
    | yq delete - 'metadata.resourceVersion' \
    | yq delete - 'metadata.uid' \
    | yq delete - 'metadata.creationTimestamp' \
    | yq delete - 'metadata.selfLink' \
    | yq delete - 'metadata.generation' \
    | yq delete - 'metadata.managedFields' \
    | yq delete - 'metadata.annotations."kubectl.kubernetes.io/last-applied-configuration"' \
    | yq delete - 'metadata.annotations."deployment.kubernetes.io/revision"' \
    | yq delete - 'status' \
    | yq write - 'metadata.name' "${SERVICE_NAME}-v${NEXT_VERSION}" \
    | yq write - 'metadata.labels.version' "v${NEXT_VERSION}" \
    | yq write - 'metadata.labels."app.kubernetes.io/version"' "v${NEXT_VERSION}" \
    | yq write - 'spec.selector.matchLabels.version' "v${NEXT_VERSION}" \
    | yq write - 'spec.template.metadata.labels.version' "v${NEXT_VERSION}" \
    | yq write - 'spec.template.metadata.labels."app.kubernetes.io/version"' "v${NEXT_VERSION}" \
    | yq write - 'spec.template.spec.containers[0].image' "${NEW_IMAGE}" \
    | kubectl apply -f -
    
    # | yq write - "spec.template.spec.containers(name==${SERVICE_NAME}).image" "${NEW_IMAGE}" # | kubectl apply -f -