Added zookeeper chart

.gitignore

@@ -2,3 +2,6 @@
 *.retry
 **/private.yaml
 vault_password
+# Helm Charts
+values.yaml
+charts/

README.md

@@ -1,3 +1,26 @@
-# Ansible set up playbooks
+# Cloud configuration
 
-Contains ansible playbooks and step-by-step instructions for cloud setup.
+Contains ansible playbooks, step-by-step instructions for cloud setup,
+and helm charts.
+
+## Helm charts
+
+The helm charts use symlinks to utilise a central collection of templates
+that is used for every chart. The values.yaml is symlinked into the 
+directory of each chart as default_values.yaml. Each chart has
+an overwrite_values.yaml file which specifies the values for that
+particular chart and overwrites the values from default_values.yaml.
+
+Before the chart can be installed locally for testing or is built
+for publishing, the actual values.yaml for Helm needs to be created 
+(paths are specified from root of repository):
+
+```shell
+cd helm/chart/
+yq '. *= load("overwrite_values.yaml")' default_values.yaml > values.yaml
+```
+
+Furthermore, each chart has an environments directory which contains
+a values file with the name of the environment (e.g. production.yaml).
+These values are not bundled into the chart on construction but rather
+supplied when installing the chart.

helm/zookeeper/.helmignore

@@ -0,0 +1,27 @@
+# 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/
+# environment values
+environments/
+default_values.yaml
+overwrite_values.yaml

helm/zookeeper/Chart.lock

@@ -0,0 +1,6 @@
+dependencies:
+- name: template
+  repository: file://../template
+  version: 0.1.4
+digest: sha256:279dbe36571da1eee759185be5f2993c19ec9288c8b00ff6ab5ca75316888584
+generated: "2023-08-20T19:41:30.542963+02:00"

helm/zookeeper/Chart.yaml

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+apiVersion: v2
+name: zookeeper
+version: 0.1.2
+type: application
+description: Simple Zookeeper chart to get started
+maintainers:
+  - name: Jim Martens
+    url: https://2martens.de
+dependencies:
+  - name: template
+    version: 0.1.4
+    repository: file://../template

helm/zookeeper/default_values.yaml

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+../template/_values.yaml

helm/zookeeper/overwrite_values.yaml

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+image:
+  repository: confluentinc/cp-zookeeper
+  tag: latest
+application:
+  port: 2181
+  isSpring: false
+  tickTime: 2000
+service:
+  port: 2181
+livenessProbe:
+  enabled: false
+readinessProbe:
+  enabled: false
+environment:
+  - name: ZOOKEEPER_CLIENT_PORT
+    value: "{{ .Values.application.port }}"
+  - name: ZOOKEEPER_TICK_TIME
+    value: "{{ .Values.application.tickTime }}"

helm/zookeeper/templates

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+../template/_templates