allow to set history-max option (#98)

in order to limit the maximum number of revisions kept

README.md

@@ -25,6 +25,7 @@ resource_types:
 * `release`: *Optional.* Name of the release (not a file, a string). (Default: autogenerated by helm)
 * `namespace`: *Optional.* Kubernetes namespace the chart will be installed into. (Default: default)
 * `helm_init_server`: *Optional.* Installs helm into the cluster if not already installed. (Default: false)
+* `helm_history_max`: *Optional.* Limits the maximum number of revisions. (Default: 0 = no limit)
 * `tiller_namespace`: *Optional.* Kubernetes namespace where tiller is running (or will be installed to). (Default: kube-system)
 * `tiller_service_account`: *Optional* Name of the service account that tiller will use (only applies if helm_init_server is true).
 * `repos`: *Optional.* Array of Helm repositories to initialize, each repository is defined as an object with properties `name`, `url` (required) username and password (optional).

assets/common.sh

@@ -77,6 +77,7 @@ setup_helm() {
   init_server=$(jq -r '.source.helm_init_server // "false"' < $1)
   tiller_namespace=$(jq -r '.source.tiller_namespace // "kube-system"' < $1)
   tls_enabled=$(jq -r '.source.tls_enabled // "false"' < $payload)
+  history_max=$(jq -r '.source.helm_history_max // "0"' < $1)
   if [ "$init_server" = true ]; then
     tiller_service_account=$(jq -r '.source.tiller_service_account // "default"' < $1)
     if [ "$tls_enabled" = true ]; then
@@ -95,9 +96,9 @@ setup_helm() {
       helm_ca_cert_path="/root/.helm/ca.pem"
       echo "$tiller_key" > $tiller_key_path
       echo "$tiller_cert" > $tiller_cert_path
-      helm init --tiller-tls --tiller-tls-cert $tiller_cert_path --tiller-tls-key $tiller_key_path --tiller-tls-verify --tls-ca-cert $tiller_key_path --tiller-namespace=$tiller_namespace --service-account=$tiller_service_account --upgrade
+      helm init --tiller-tls --tiller-tls-cert $tiller_cert_path --tiller-tls-key $tiller_key_path --tiller-tls-verify --tls-ca-cert $tiller_key_path --tiller-namespace=$tiller_namespace --service-account=$tiller_service_account --history-max=$history_max --upgrade
     else
-      helm init --tiller-namespace=$tiller_namespace --service-account=$tiller_service_account --upgrade
+      helm init --tiller-namespace=$tiller_namespace --service-account=$tiller_service_account --history-max=$history_max --upgrade
     fi
     wait_for_service_up tiller-deploy 10
   else