111 lines
3.3 KiB
Bash
111 lines
3.3 KiB
Bash
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#!/bin/bash
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# Simulate well-known CRDs being available
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API_VERSIONS="-a monitoring.coreos.com/v1 -a snapshot.storage.k8s.io/v1"
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# Waits for max 300s and retries
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function wait_for() {
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local TRIES=0
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while true; do
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eval " $@" && break
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[ $TRIES -eq 100 ] && return 1
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let TRIES=$TRIES+1
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sleep 3
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done
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}
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function chart_location() {
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echo "$1 --repo https://cdn.zero-downtime.net/charts"
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}
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# make sure namespace exists prior to calling helm as the create-namespace options doesn't work
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function create_ns() {
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local namespace=$1
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if [ "$namespace" != "kube-system" ]; then
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kubectl get ns $namespace || kubectl create ns $namespace
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fi
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}
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# delete non kube-system ns
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function delete_ns() {
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local namespace=$1
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[ "$namespace" != "kube-system" ] && kubectl delete ns $namespace
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}
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# Extract crds via helm calls and apply delta=crds only
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function _crds() {
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helm template $(chart_location $chart) -n $namespace --name-template $module $targetRevision --skip-crds --set ${module}.installCRDs=false -f $WORKDIR/values.yaml $API_VERSIONS --kube-version $KUBE_VERSION > $WORKDIR/helm-no-crds.yaml
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helm template $(chart_location $chart) -n $namespace --name-template $module $targetRevision --include-crds --set ${module}.installCRDs=true -f $WORKDIR/values.yaml $API_VERSIONS --kube-version $KUBE_VERSION > $WORKDIR/helm-crds.yaml
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diff -e $WORKDIR/helm-no-crds.yaml $WORKDIR/helm-crds.yaml | head -n-1 | tail -n+2 > $WORKDIR/crds.yaml
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# Only apply if there are actually any crds
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if [ -s $WORKDIR/crds.yaml ]; then
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kubectl apply -f $WORKDIR/crds.yaml --server-side
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fi
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}
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# helm template | kubectl apply -f -
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# confine to one namespace if possible
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function apply() {
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helm template $(chart_location $chart) -n $namespace --name-template $module $targetRevision --skip-crds -f $WORKDIR/values.yaml $API_VERSIONS --kube-version $KUBE_VERSION $@ \
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| python3 -c '
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#!/usr/bin/python3
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import yaml
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import sys
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for manifest in yaml.safe_load_all(sys.stdin):
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if manifest:
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if "metadata" in manifest and "namespace" not in manifest["metadata"]:
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manifest["metadata"]["namespace"] = sys.argv[1]
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print("---")
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print(yaml.dump(manifest))' $namespace > $WORKDIR/helm.yaml
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kubectl $action -f $WORKDIR/helm.yaml && rc=$? || rc=$?
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}
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function _helm() {
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local action=$1
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local module=$2
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local chart="$(yq eval '.spec.source.chart' $WORKDIR/kubezero/templates/${module}.yaml)"
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local namespace="$(yq eval '.spec.destination.namespace' $WORKDIR/kubezero/templates/${module}.yaml)"
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targetRevision=""
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_version="$(yq eval '.spec.source.targetRevision' $WORKDIR/kubezero/templates/${module}.yaml)"
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[ -n "$_version" ] && targetRevision="--version $_version"
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yq eval '.spec.source.helm.values' $WORKDIR/kubezero/templates/${module}.yaml > $WORKDIR/values.yaml
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if [ $action == "crds" ]; then
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# Allow custom CRD handling
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declare -F ${module}-crds && ${module}-crds || _crds
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elif [ $action == "apply" ]; then
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# namespace must exist prior to apply
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create_ns $namespace
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# Optional pre hook
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declare -F ${module}-pre && ${module}-pre
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apply
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# Optional post hook
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declare -F ${module}-post && ${module}-post
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elif [ $action == "delete" ]; then
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apply
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# Delete dedicated namespace if not kube-system
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[ -n "$DELETE_NS" ] && delete_ns $namespace
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fi
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return 0
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}
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