add host aliases

library/common-test/tests/pod/deployment_dns-network_test.yaml

@@ -248,3 +248,78 @@ tests:
               - name: ndots
                 value: "2"
               - name: edns0
+
+  - it: should fail without ip in hostAliases
+    set:
+      hostAliases:
+        - hostnames:
+          - hostname1
+    asserts:
+      - failedTemplate:
+          documentIndex: *deploymentDoc
+          errorMessage: <ip> field is required in hostAliases
+
+  - it: should fail without hostnames in hostAliases
+    set:
+      hostAliases:
+        - ip: 1.1.1.1
+    asserts:
+      - failedTemplate:
+          documentIndex: *deploymentDoc
+          errorMessage: At least one <hostnames> is required in hostAliases
+
+  - it: should pass with hostAliases defined
+    set:
+      hostAliases:
+        - ip: 1.1.1.1
+          hostnames:
+            - hostname1
+            - hostname2
+        - ip: 8.8.8.8
+          hostnames:
+            - hostname3
+            - hostname4
+    asserts:
+      - equal:
+          documentIndex: *deploymentDoc
+          path: spec.template.spec.hostAliases
+          value:
+            - ip: 1.1.1.1
+              hostnames:
+                - hostname1
+                - hostname2
+            - ip: 8.8.8.8
+              hostnames:
+                - hostname3
+                - hostname4
+
+  - it: should pass with hostAliases defined from tpl
+    set:
+      ip1: 1.1.1.1
+      ip2: 8.8.8.8
+      host1: hostname1
+      host2: hostname2
+      host3: hostname3
+      host4: hostname4
+      hostAliases:
+        - ip: "{{ .Values.ip1 }}"
+          hostnames:
+            - "{{ .Values.host1 }}"
+            - "{{ .Values.host2 }}"
+        - ip: "{{ .Values.ip2 }}"
+          hostnames:
+            - "{{ .Values.host3 }}"
+            - "{{ .Values.host4 }}"
+    asserts:
+      - equal:
+          documentIndex: *deploymentDoc
+          path: spec.template.spec.hostAliases
+          value:
+            - ip: 1.1.1.1
+              hostnames:
+                - hostname1
+                - hostname2
+            - ip: 8.8.8.8
+              hostnames:
+                - hostname3
+                - hostname4

library/common/1.0.0/templates/lib/chart/_hostAliases.tpl

@@ -0,0 +1,14 @@
+{{/* Returns host aliases */}}
+{{- define "ix.v1.common.hostAliases" -}}
+  {{- range .Values.hostAliases }}
+- ip: {{ (tpl (required "<ip> field is required in hostAliases" .ip) $ | quote) }}
+    {{- if .hostnames }}
+  hostnames:
+      {{- range .hostnames }}
+    - {{ tpl . $ }}
+      {{- end}}
+    {{- else -}}
+      {{- fail "At least one <hostnames> is required in hostAliases" -}}
+    {{- end -}}
+  {{- end -}}
+{{- end -}}

library/common/1.0.0/templates/lib/controller/_pod.tpl

@@ -17,6 +17,10 @@ dnsPolicy: {{ . }}
 dnsConfig:
   {{- . | nindent 2 }}
 {{- end -}}
+{{- with (include "ix.v1.common.hostAliases" . | trim) }}
+hostAliases:
+  {{- . | nindent 2 }}
+{{- end -}}
 {{- with .Values.termination.gracePeriodSeconds }}
 terminationGracePeriodSeconds: {{ . }}
 {{- end }}
@@ -30,5 +34,5 @@ containers:
 {{- with (include "ix.v1.common.controller.volumes" . | trim) }}
 volumes:
     {{- . | nindent 2 }}
-{{- end }}
+{{- end -}}
 {{- end -}}

library/common/1.0.0/values.yaml

@@ -53,6 +53,8 @@ dnsPolicy: ""
 
 dnsConfig: {}
 
+hostAliases: []
+
 # TODO: docs
 podSecurityContext:
   runAsUser: 568