Add postprocessing filter to keep supporting `driver_daemonset_tolera…

…tions` parameter

We can't simply pass the parameter to the `node.tolerations` Helm value,
since that value expects an array of regular tolerations while the
component parameter is structured to allow users to overwrite
tolerations.

Note that the postprocessing filter will retain tolerations configured
through the Helm value and will simply append any tolerations configured
in `driver_daemonset_tolerations`.

class/csi-cloudscale.yml

@@ -22,3 +22,9 @@ parameters:
           - ${_base_directory}/component/main.jsonnet
         input_type: jsonnet
         output_path: csi-cloudscale/
+  commodore:
+    postprocess:
+      filters:
+        - type: jsonnet
+          filter: postprocess/driver_daemonset_tolerations.jsonnet
+          path: csi-cloudscale/01_helm_chart/csi-cloudscale/templates

postprocess/driver_daemonset_tolerations.jsonnet

@@ -0,0 +1,29 @@
+local com = import 'lib/commodore.libjsonnet';
+
+local inv = com.inventory();
+local params = inv.parameters.csi_cloudscale;
+local tolerations = params.driver_daemonset_tolerations;
+
+local chartDir = std.extVar('output_path');
+
+com.fixupDir(
+  chartDir,
+  function(obj)
+    if obj.kind == 'DaemonSet' then
+      obj {
+        spec+: {
+          template+: {
+            spec+: {
+              [if std.length(tolerations) > 0 then 'tolerations']+: [
+                tolerations[name] {
+                  key: name,
+                }
+                for name in std.objectFields(tolerations)
+              ],
+            },
+          },
+        },
+      }
+    else
+      obj
+)

tests/golden/openshift4/csi-cloudscale/csi-cloudscale/01_helm_chart/csi-cloudscale/templates/daemonset.yaml

@@ -86,6 +86,10 @@ spec:
       hostNetwork: true
       priorityClassName: system-node-critical
       serviceAccount: csi-cloudscale-node-sa
+      tolerations:
+        - effect: NoSchedule
+          key: storagenode
+          operator: Exists
       volumes:
         - hostPath:
             path: /var/lib/kubelet/plugins_registry/

tests/openshift4.yml

@@ -14,3 +14,9 @@ parameters:
 
   facts:
     distribution: openshift4
+
+  csi_cloudscale:
+    driver_daemonset_tolerations:
+      storagenode:
+        operator: Exists
+        effect: NoSchedule