From 2cc2e0582158ce3bf076719f7c9cb78d90c75b27 Mon Sep 17 00:00:00 2001
From: Jim Martens <github@2martens.de>
Date: Sun, 20 Aug 2023 19:46:33 +0200
Subject: [PATCH] Added zookeeper chart

---
 .gitignore                           |  3 +++
 README.md                            | 27 +++++++++++++++++++++++++--
 helm/zookeeper/.helmignore           | 27 +++++++++++++++++++++++++++
 helm/zookeeper/Chart.lock            |  6 ++++++
 helm/zookeeper/Chart.yaml            | 12 ++++++++++++
 helm/zookeeper/default_values.yaml   |  1 +
 helm/zookeeper/overwrite_values.yaml | 18 ++++++++++++++++++
 helm/zookeeper/templates             |  1 +
 8 files changed, 93 insertions(+), 2 deletions(-)
 create mode 100644 helm/zookeeper/.helmignore
 create mode 100644 helm/zookeeper/Chart.lock
 create mode 100644 helm/zookeeper/Chart.yaml
 create mode 120000 helm/zookeeper/default_values.yaml
 create mode 100644 helm/zookeeper/overwrite_values.yaml
 create mode 120000 helm/zookeeper/templates

diff --git a/.gitignore b/.gitignore
index 4e8be69..8fecb7c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,6 @@
 *.retry
 **/private.yaml
 vault_password
+# Helm Charts
+values.yaml
+charts/
diff --git a/README.md b/README.md
index 83f3b91..64e37d4 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,26 @@
-# Ansible set up playbooks
+# Cloud configuration
 
-Contains ansible playbooks and step-by-step instructions for cloud setup.
\ No newline at end of file
+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.
diff --git a/helm/zookeeper/.helmignore b/helm/zookeeper/.helmignore
new file mode 100644
index 0000000..8bd27ef
--- /dev/null
+++ b/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
diff --git a/helm/zookeeper/Chart.lock b/helm/zookeeper/Chart.lock
new file mode 100644
index 0000000..3752f9e
--- /dev/null
+++ b/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"
diff --git a/helm/zookeeper/Chart.yaml b/helm/zookeeper/Chart.yaml
new file mode 100644
index 0000000..b1c740f
--- /dev/null
+++ b/helm/zookeeper/Chart.yaml
@@ -0,0 +1,12 @@
+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
diff --git a/helm/zookeeper/default_values.yaml b/helm/zookeeper/default_values.yaml
new file mode 120000
index 0000000..00d0a7d
--- /dev/null
+++ b/helm/zookeeper/default_values.yaml
@@ -0,0 +1 @@
+../template/_values.yaml
\ No newline at end of file
diff --git a/helm/zookeeper/overwrite_values.yaml b/helm/zookeeper/overwrite_values.yaml
new file mode 100644
index 0000000..ebd63aa
--- /dev/null
+++ b/helm/zookeeper/overwrite_values.yaml
@@ -0,0 +1,18 @@
+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 }}"
diff --git a/helm/zookeeper/templates b/helm/zookeeper/templates
new file mode 120000
index 0000000..baefb49
--- /dev/null
+++ b/helm/zookeeper/templates
@@ -0,0 +1 @@
+../template/_templates
\ No newline at end of file