Add network policies chart

README.md

@@ -36,4 +36,5 @@ Following the list complete list of supported Helm Charts:
 * devlake
 * elasticsearch-umbrella
 * imagepullsecret-patcher
+* networkpolicies
 * yace-exporter

charts/networkpolicies/.helmignore

@@ -0,0 +1,23 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/networkpolicies/Chart.yaml

@@ -0,0 +1,24 @@
+apiVersion: v2
+name: networkpolicies
+description: A Helm chart for Kubernetes
+
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+# Versions are expected to follow Semantic Versioning (https://semver.org/)
+version: 0.1.0
+
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application. Versions are not expected to
+# follow Semantic Versioning. They should reflect the version the application is using.
+# It is recommended to use it with quotes.
+appVersion: "0.1.0"

charts/networkpolicies/README.md

@@ -0,0 +1,41 @@
+# networkpolicies
+
+![Version: 0.1.0](https://img.shields.io/badge/Version-0.1.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.1.0](https://img.shields.io/badge/AppVersion-0.1.0-informational?style=flat-square)
+
+A Helm chart for Kubernetes
+
+## Values
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| aws.dns | bool | `false` |  |
+| aws.enabled | bool | `false` |  |
+| aws.kinesis | bool | `false` |  |
+| aws.redis | bool | `false` |  |
+| aws.redisCIDR | string | `"0.0.0.0/0"` |  |
+| aws.redisPort | int | `6379` |  |
+| aws.s3 | bool | `false` |  |
+| aws.sns | bool | `false` |  |
+| aws.sqs | bool | `false` |  |
+| dns.app | string | `"kube-dns"` |  |
+| dns.namespace | string | `"kube-system"` |  |
+| egressRules | list | `[]` | [example](#rules) |
+| fullnameOverride | string | `""` |  |
+| ingressRules | list | `[]` | [example](#rules) |
+| mongoAtlas.cidr | string | `"0.0.0.0/0"` |  |
+| mongoAtlas.enabled | bool | `false` |  |
+| mongoAtlas.port | int | `27017` |  |
+| nameOverride | string | `""` |  |
+
+## Rules
+
+```yaml
+- selectors:
+  - namespaceSelector: {}
+    podSelector:
+      matchLabels:
+        empathy.co/component: test-service
+  ports:
+    - protocol: TCP
+      port: 80
+```

charts/networkpolicies/templates/_helpers.tpl

@@ -0,0 +1,59 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "networkpolicies.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "networkpolicies.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "networkpolicies.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "networkpolicies.labels" -}}
+helm.sh/chart: {{ include "networkpolicies.chart" . }}
+{{ include "networkpolicies.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "networkpolicies.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "networkpolicies.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+
+{{/*
+Return the appropriate apiVersion for the object
+*/}}
+{{- define "apiVersion" -}}
+{{- default "networking.k8s.io/v1" .Values.apiVersion -}}
+{{- end -}}

charts/networkpolicies/templates/networkpolicy-atlas-rules.yaml

@@ -0,0 +1,43 @@
+{{ if .Values.mongoAtlas.enabled }}
+kind: NetworkPolicy
+apiVersion: {{ include "apiVersion" . }}
+metadata:
+  name: {{ include "networkpolicies.name" . }}-atlas
+{{- if .Values.annotations }}
+  annotations:
+{{ toYaml .Values.annotations | indent 4}}
+{{- end }}
+  labels:
+     {{- include "networkpolicies.labels" . | nindent 4 }}
+{{- if .Values.labels }}
+{{ toYaml .Values.labels | indent 4 }}
+{{- end }}
+spec:
+{{- if .Values.podSelector }}
+  podSelector:
+    matchLabels:
+{{ toYaml .Values.podSelector.matchLabels | indent 7 }}
+{{- end }}
+{{- if or (eq .Values.aws.s3 true) (eq .Values.aws.kinesis true) (eq .Values.aws.sns true) (eq .Values.aws.sqs true)}}
+  policyTypes:
+    - Egress
+  egress:
+    - to:
+      - ipBlock:
+          cidr:
+          - 0.0.0.0/0
+      ports:
+      - protocol: TCP
+        port: 443
+{{- end }}
+
+{{- if eq .Values.aws.redis true }}
+    - to:
+      - ipBlock:
+          cidr:
+          - {{ .Values.aws.redisCIDR }}
+      ports:
+      - protocol: TCP
+        port: {{ .Values.aws.redisPort }}
+{{- end }}
+{{- end }}

charts/networkpolicies/templates/networkpolicy-aws-rules.yaml

@@ -0,0 +1,43 @@
+{{ if .Values.aws.enabled }}
+kind: NetworkPolicy
+apiVersion: {{ include "apiVersion" . }}
+metadata:
+  name: {{ include "networkpolicies.name" . }}-aws
+{{- if .Values.annotations }}
+  annotations:
+{{ toYaml .Values.annotations | indent 4}}
+{{- end }}
+  labels:
+     {{- include "networkpolicies.labels" . | nindent 4 }}
+{{- if .Values.labels }}
+{{ toYaml .Values.labels | indent 4 }}
+{{- end }}
+spec:
+{{- if .Values.podSelector }}
+  podSelector:
+    matchLabels:
+{{ toYaml .Values.podSelector.matchLabels | indent 7 }}
+{{- end }}
+{{- if or (eq .Values.aws.s3 true) (eq .Values.aws.kinesis true) (eq .Values.aws.sns true) (eq .Values.aws.sqs true)}}
+  policyTypes:
+    - Egress
+  egress:
+    - to:
+      - ipBlock:
+          cidr:
+          - 0.0.0.0/0
+      ports:
+      - protocol: TCP
+        port: 443
+{{- end }}
+
+{{- if eq .Values.aws.redis true }}
+    - to:
+      - ipBlock:
+          cidr:
+          - {{ .Values.aws.redisCIDR }}
+      ports:
+      - protocol: TCP
+        port: {{ .Values.aws.redisPort }}
+{{- end }}
+{{- end }}

charts/networkpolicies/templates/networkpolicy.yaml

@@ -0,0 +1,81 @@
+kind: NetworkPolicy
+apiVersion: {{ include "apiVersion" . }}
+metadata:
+  name: {{ include "networkpolicies.name" . }}
+{{- if .Values.annotations }}
+  annotations:
+{{ toYaml .Values.annotations | indent 4}}
+{{- end }}
+  labels:
+     {{- include "networkpolicies.labels" . | nindent 4 }}
+{{- if .Values.labels }}
+{{ toYaml .Values.labels | indent 4 }}
+{{- end }}
+spec:
+{{- if .Values.podSelector }}
+  podSelector:
+    matchLabels:
+{{ toYaml .Values.podSelector.matchLabels | indent 7 }}
+{{- end }}
+{{- if or .Values.ingressRules .Values.egressRules }}
+  policyTypes:
+{{- if .Values.ingressRules }}
+    - Ingress
+{{- end }}
+{{- if .Values.egressRules }}
+    - Egress
+{{- end }}
+{{- end }}
+{{- if .Values.egressRules }}
+  egress:
+{{-  range $rule := .Values.egressRules }}
+    - to:
+{{ toYaml $rule.selectors | indent 9 }}
+      ports:
+{{ toYaml $rule.ports | indent 9 }}  
+{{- end }}
+{{- end }}
+{{- if .Values.ingressRules }}
+  ingress:
+{{-  range $rule := .Values.ingressRules }}
+    - from:
+{{ toYaml $rule.selectors | indent 7 }}
+      ports:
+{{ toYaml $rule.ports | indent 9 }}  
+{{- end }}
+{{- end }}
+--- 
+{{- if .Values.dns }}
+kind: NetworkPolicy
+apiVersion: {{ include "apiVersion" . }}
+metadata:
+  name: {{ include "networkpolicies.name" . }}-dns
+{{- if .Values.annotations }}
+  annotations:
+{{ toYaml .Values.annotations | indent 4}}
+{{- end }}
+  labels:
+     {{- include "networkpolicies.labels" . | nindent 4 }}
+{{- if .Values.labels }}
+{{ toYaml .Values.labels | indent 4 }}
+{{- end }}
+spec:
+  podSelector:
+    matchLabels:
+{{ toYaml .Values.podSelector.matchLabels | indent 7 }}
+  policyTypes:
+    - Egress
+  egress:
+    - ports:
+        - port: 53
+          protocol: UDP
+        - port: 53
+          protocol: TCP
+      to:
+        - podSelector:
+            matchLabels:
+              app: {{ .Values.dns.app }}
+        - namespaceSelector:
+            matchLabels:
+              name: {{ .Values.dns.namespace }}
+{{- end }}

charts/networkpolicies/values.yaml

@@ -0,0 +1,25 @@
+# Default values for networkpolicies.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+nameOverride: ""
+fullnameOverride: ""
+egressRules: []
+ingressRules: []
+dns: 
+  namespace: kube-system
+  app: kube-dns
+aws:
+  enabled: false
+  dns: false
+  s3: false
+  kinesis: false
+  sqs: false
+  sns: false
+  redis: false
+  redisCIDR: 0.0.0.0/0
+  redisPort: 6379
+mongoAtlas:
+  enabled: false
+  cidr: 0.0.0.0/0
+  port: 27017
+