fix: increase default size of the dynamic-plugins-root volume from 1Gi to 2Gi (#238)

* fix: increase default size of the dynamic-plugins-root volume from 1Gi to 2Gi

This applies the same fix done in the Helm Chart [1].

As depicted in [2], the init container might fail with insufficient
space error:
```
======= Installing dynamic plugin ./dynamic-plugins/dist/backstage-plugin-scaffolder-backend-module-github-dynamic
==> Grabbing package archive through `npm pack`
 Traceback (most recent call last):
  File "/opt/app-root/src/install-dynamic-plugins.py", line 304, in <module> main()
   File "/opt/app-root/src/install-dynamic-plugins.py", line 230, in main
    raise InstallException(f'Error while installing plugin \{ package } with \'npm pack\' : ' + completed.stderr.decode('utf-8')) __main__.InstallException: Error while installing plugin /opt/app-root/src/dynamic-plugins/dist/backstage-plugin-scaffolder-backend-module-github-dynamic with 'npm pack' : npm notice npm notice New major version of npm available! 9.8.1 -> 10.4.0 npm notice Changelog: <https://github.com/npm/cli/releases/tag/v10.4.0> npm notice Run `npm install -g npm@10.4.0` to update! npm notice npm ERR! code ENOSPC npm ERR! syscall open npm ERR! path /dynamic-plugins-root/backstage-plugin-scaffolder-backend-module-github-dynamic-0.2.0-next.3.tgz npm ERR! errno -28 npm ERR! nospc ENOSPC: no space left on device, open '/dynamic-plugins-root/backstage-plugin-scaffolder-backend-module-github-dynamic-0.2.0-next.3.tgz' npm ERR! nospc There appears to be insufficient space on your system to finish. npm ERR! nospc Clear up some disk space and try again.
```

[1] redhat-developer/rhdh-chart#5
[2] https://issues.redhat.com/browse/RHIDP-1332

* Add test

Author: rm3l

bundle/manifests/backstage-default-config_v1_configmap.yaml

@@ -180,7 +180,7 @@ data:
                       - ReadWriteOnce
                     resources:
                       requests:
-                        storage: 1Gi
+                        storage: 2Gi
               name: dynamic-plugins-root
             - name: dynamic-plugins-npmrc
               secret:

config/manager/default-config/deployment.yaml

@@ -21,7 +21,7 @@ spec:
                   - ReadWriteOnce
                 resources:
                   requests:
-                    storage: 1Gi
+                    storage: 2Gi
           name: dynamic-plugins-root
         - name: dynamic-plugins-npmrc
           secret:

controllers/backstage_controller_test.go

@@ -26,6 +26,7 @@ import (
 	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/utils/pointer"
@@ -299,8 +300,17 @@ var _ = Describe("Backstage controller", func() {
 			By("Checking the Volumes in the Backstage Deployment", func() {
 				Expect(found.Spec.Template.Spec.Volumes).To(HaveLen(4))
 
-				_, ok := findVolume(found.Spec.Template.Spec.Volumes, "dynamic-plugins-root")
+				dpRootVol, ok := findVolume(found.Spec.Template.Spec.Volumes, "dynamic-plugins-root")
 				Expect(ok).To(BeTrue(), "No volume found with name: dynamic-plugins-root")
+				Expect(dpRootVol.Ephemeral).ShouldNot(BeNil())
+				Expect(dpRootVol.Ephemeral.VolumeClaimTemplate).ShouldNot(BeNil())
+				storage := dpRootVol.Ephemeral.VolumeClaimTemplate.Spec.Resources.Requests.Storage()
+				Expect(storage).ShouldNot(BeNil())
+				q, pErr := resource.ParseQuantity("1Gi")
+				Expect(pErr).ShouldNot(HaveOccurred())
+				// https://issues.redhat.com/browse/RHIDP-1332: storage size should be > 1Gi
+				Expect(storage.Cmp(q)).To(Equal(1),
+					"storage size for dynamic-plugins-root volume is currently %v, but it should be more than %v", storage, q)
 
 				_, ok = findVolume(found.Spec.Template.Spec.Volumes, "dynamic-plugins-npmrc")
 				Expect(ok).To(BeTrue(), "No volume found with name: dynamic-plugins-npmrc")