Shell script for extracting JSON schema and generating OAM workloads from service mesh manifests

generator.sh

#!/usr/env bash

# change these vars according to needs
NEW_ISTIO_VERSION=1.10.3
UTILPATH=~/dev/kubeopenapi-jsonschema
meshName=Istio
smpMeshName=ISTIO
resourceType=CustomResourceDefinition
dirName=./templates/oam/workloads/$NEW_ISTIO_VERSION

# change this according to the link for fetching manifests
curl https://raw.githubusercontent.com/istio/istio/$NEW_ISTIO_VERSION/manifests/charts/base/crds/crd-all.gen.yaml > ~/istio.yml

template='{"apiVersion":"core.oam.dev/v1alpha1","kind":"WorkloadDefinition","metadata":{},"spec":{"definitionRef":{},"metadata":{"@type":"pattern.meshery.io/mesh/workload","meshVersion":"'$NEW_ISTIO_VERSION'","meshName":"'$smpMeshName'","k8sAPIVersion":null,"k8sKind":""}}}'

crds=$($UTILPATH/kubeopenapi-jsonschema --location ~/istio.yml -t yaml --filter '$[?(@.kind=="CustomResourceDefinition")]' -o json --o-filter '$..["spec"]["names"]["kind"]' | jq '.[]')

mkdir -p $dirName

for t in ${crds[@]}; do

				nameUpper=`echo $t  | tr -d '"'`
				nameLower=`echo $t  | tr -d '"' | tr '[:upper:]' '[:lower:]'`
				definitionRef=$(printf %s.istio.meshery.layer5.io $nameLower)

				apiVersion=$($UTILPATH/kubeopenapi-jsonschema --location ~/istio.yml -t yaml --filter '$[?(@.kind=="CustomResourceDefinition" && @.spec.names.kind=='$t')]..spec.versions[0]' --o-filter "$[].name" -o json | jq '.[]' | tr -d '"')

				apiGroup=$($UTILPATH/kubeopenapi-jsonschema --location ~/istio.yml -t yaml --filter '$[?(@.kind=="CustomResourceDefinition" && @.spec.names.kind=='$t')]..spec' --o-filter "$[].group" -o json | jq '.[]' | tr -d '"')

				$UTILPATH/kubeopenapi-jsonschema --location ~/istio.yml -t yaml --filter '$[?(@.kind=="CustomResourceDefinition" && @.spec.names.kind=='$t')]..openAPIV3Schema.properties.spec' --o-filter "$[]" -o json |\
				jq '
				.[]
				| .version = "'$NEW_ISTIO_VERSION'"
				| ."object-type" = "'$nameUpper'"
				| ."service-mesh" = "'$meshName'" ' > $dirName/$nameLower.istio.meshery.layer5io.schema.json

				echo $template |\
				jq '
				."metadata"."name" = "'$(printf %s.Istio $nameUpper)'"
				| ."spec"."metadata"."k8sAPIVersion" = "'$(printf $apiGroup/$apiVersion $apiGroup $apiVersion)'"
        | ."spec"."metadata"."k8sKind" = "'$nameUpper'"
        | ."spec"."definitionRef"."name"="'$definitionRef'"' > $dirName/$nameLower.istio_definition.json

done

How to use

-> Building kubeopenapi-jsonschema

• nvm install v14.15.3
• nvm install-latest-npm
• git clone https://github.com/layer5io/kubeopenapi-jsonschema
• cd kubeopenapi-jsonschema
• sudo npm i
• sudo npm i nexe -g
• make linux

->Using the script

get the script in adapter repo

few things you need to keep in mind before running the script

• Build the kubeopenapi-jsonschema before
• set the UTILPATH variable to where the kubeopenapi-jsonschema is , for example if it is on desktop it should be UTILPATH=~/Desktop/kubeopenapi-jsonschema
• make sure the crds link is valid

Now run the script using bash generator.sh and go brrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

Thanks @Shreyas220 👍