feat(common): add hostPID support (#428)

**Description**
It seems somehow this option was forgoten to be included.

**⚙️ Type of change**

- [x] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [ ] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

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---------

Co-authored-by: Stavros Kois <47820033+stavros-k@users.noreply.github.com>

library/common-test/tests/defaults/defaults-test.yaml

@@ -61,6 +61,7 @@ tests:
             automountServiceAccountToken: false
             runtimeClassName:
             hostNetwork: false
+            hostPID: false
             enableServiceLinks: false
             restartPolicy: Always
             dnsPolicy: ClusterFirst

library/common-test/tests/pod/host_pid_test.yaml

@@ -0,0 +1,75 @@
+suite: pod hostpid test
+templates:
+  - common.yaml
+tests:
+  - it: should pass with hostpid disabled from "global"
+    set:
+      podOptions:
+        hostPID: false
+      workload:
+        workload-name1:
+          enabled: true
+          primary: true
+          type: Deployment
+          podSpec: {}
+    asserts:
+      - documentIndex: &deploymentDoc 0
+        isKind:
+          of: Deployment
+      - documentIndex: *deploymentDoc
+        equal:
+          path: spec.template.spec.hostPID
+          value: false
+
+  - it: should pass with hostpid enabled from "global"
+    set:
+      podOptions:
+        hostPID: true
+      workload:
+        workload-name1:
+          enabled: true
+          primary: true
+          type: Deployment
+          podSpec: {}
+    asserts:
+      - documentIndex: *deploymentDoc
+        isKind:
+          of: Deployment
+      - documentIndex: *deploymentDoc
+        equal:
+          path: spec.template.spec.hostPID
+          value: true
+
+  - it: should pass with disabled hostpid from pod
+    set:
+      podOptions:
+        hostPID: true
+      workload:
+        workload-name1:
+          enabled: true
+          primary: true
+          type: Deployment
+          podSpec:
+            hostPID: false
+    asserts:
+      - documentIndex: *deploymentDoc
+        equal:
+          path: spec.template.spec.hostPID
+          value: false
+
+  - it: should pass with enabled hostpid from pod
+    set:
+      podOptions:
+        hostPID: false
+      workload:
+        workload-name1:
+          enabled: true
+          primary: true
+          type: Deployment
+          podSpec:
+            hostPID: true
+    asserts:
+      - documentIndex: *deploymentDoc
+        equal:
+          path: spec.template.spec.hostPID
+          value: true

library/common/Chart.yaml

@@ -15,4 +15,4 @@ maintainers:
 name: common
 sources: null
 type: library
-version: 12.9.1
+version: 12.9.2

library/common/templates/lib/pod/_hostPID.tpl

@@ -0,0 +1,24 @@
+{{/* Returns Host PID */}}
+{{/* Call this template:
+{{ include "tc.v1.common.lib.pod.hostPID" (dict "rootCtx" $ "objectData" $objectData) }}
+rootCtx: The root context of the chart.
+objectData: The object data to be used to render the Pod.
+*/}}
+{{- define "tc.v1.common.lib.pod.hostPID" -}}
+  {{- $rootCtx := .rootCtx -}}
+  {{- $objectData := .objectData -}}
+
+  {{- $hostPID := false -}}
+
+  {{/* Initialize from the "global" option */}}
+  {{- if (kindIs "bool" $rootCtx.Values.podOptions.hostPID) -}}
+    {{- $hostPID = $rootCtx.Values.podOptions.hostPID -}}
+  {{- end -}}
+
+  {{/* Override with pods option */}}
+  {{- if (kindIs "bool" $objectData.podSpec.hostPID) -}}
+    {{- $hostPID = $objectData.podSpec.hostPID -}}
+  {{- end -}}
+
+  {{- $hostPID -}}
+{{- end -}}

library/common/templates/lib/workload/_pod.tpl

@@ -15,6 +15,7 @@ imagePullSecrets:
     {{-  . | nindent 2 }}
   {{- end }}
 hostNetwork: {{ include "tc.v1.common.lib.pod.hostNetwork" (dict "rootCtx" $rootCtx "objectData" $objectData) }}
+hostPID: {{ include "tc.v1.common.lib.pod.hostPID" (dict "rootCtx" $rootCtx "objectData" $objectData) }}
 enableServiceLinks: {{ include "tc.v1.common.lib.pod.enableServiceLinks" (dict "rootCtx" $rootCtx "objectData" $objectData) }}
 restartPolicy: {{ include "tc.v1.common.lib.pod.restartPolicy" (dict "rootCtx" $rootCtx "objectData" $objectData) }}
   {{- with (include "tc.v1.common.lib.pod.schedulerName" (dict "rootCtx" $rootCtx "objectData" $objectData)) }}