kubernetes: add standalone/pod role

2 files changed, 95 insertions, 0 deletions

diff --git a/roles/kubernetes/standalone/pod/defaults/main.yml b/roles/kubernetes/standalone/pod/defaults/main.yml
new file mode 100644
index 00000000..87e849d8
--- /dev/null
+++ b/roles/kubernetes/standalone/pod/defaults/main.yml
@@ -0,0 +1,23 @@
+---
+# kubernetes_standalone_pod:
+#   name: example
+#   labels:
+#     foo: bar
+#   annotations:
+#     hello: world
+#   spec: |
+#     containers:
+#     - name: test
+#       image: "debian:stable"
+#       command:
+#       - /bin/bash
+#       - -c
+#       - "sleep inf"
+
+#   config_hash_items:
+#   - path: /path/to/configfile
+#     properties:
+#     - checksum
+#     - mode
+#     - uid
+#     - gid
diff --git a/roles/kubernetes/standalone/pod/tasks/main.yml b/roles/kubernetes/standalone/pod/tasks/main.yml
new file mode 100644
index 00000000..b59e4f38
--- /dev/null
+++ b/roles/kubernetes/standalone/pod/tasks/main.yml
@@ -0,0 +1,72 @@
+---
+- name: generate config-hash
+  when: "'config_hash_items' in kubernetes_standalone_pod"
+  block:
+  - name: create directory for config-hash files
+    file:
+      path: /etc/kubernetes/config-hashes
+      state: directory
+
+  - name: gather stats for config-hash items
+    loop: "{{ kubernetes_standalone_pod.config_hash_items }}"
+    loop_control:
+      label: "{{ item.path }} ({{ item.properties | sort | join(', ') }})"
+    stat:
+      path: "{{ item.path }}"
+      get_checksum: yes
+      checksum_algorithm: sha256
+    register: config_hash_items_stat
+
+  - assert:
+      msg: "at least one config-hash item does not exist"
+      that: false not in (config_hash_items_stat.results | map(attribute='stat.exists'))
+
+  - name: generate config-hash file
+    copy:
+      content: |
+        {% for result in config_hash_items_stat.results %}
+        {{ result.item.path }}:
+        {%   for property in (result.item.properties | sort) %}
+          {{ property }}: {{ result.stat[property] }}
+        {%   endfor %}
+        {% endfor %}
+      dest: "/etc/kubernetes/config-hashes/{{ kubernetes_standalone_pod.name }}.yml"
+
+  - name: compute config-hash value from file
+    stat:
+      path: "/etc/kubernetes/config-hashes/{{ kubernetes_standalone_pod.name }}.yml"
+      get_checksum: yes
+      checksum_algorithm: sha256
+    register: config_hash_file_stat
+
+  - name: set config-hash value
+    set_fact:
+      config_hash_value: "{{ config_hash_file_stat.stat.checksum }}"
+
+- name: remove config-hash file
+  when: "'config_hash_items' not in kubernetes_standalone_pod"
+  file:
+    path: "/etc/kubernetes/config-hashes/{{ kubernetes_standalone_pod.name }}.yml"
+    state: absent
+
+- name: generate pod manifest
+  copy:
+    content: |
+      apiVersion: v1
+      kind: Pod
+      metadata:
+        name: {{ kubernetes_standalone_pod.name }}
+      {% if 'labels' in kubernetes_standalone_pod %}
+        labels:
+          {{ kubernetes_standalone_pod.labels | to_nice_yaml(indent=2) | indent(4) }}{% endif %}
+      {% if config_hash_value is defined or'annotations' in kubernetes_standalone_pod %}
+        annotations:
+      {%   if config_hash_value is defined %}
+          config-hash: {{ config_hash_value }}
+      {%   endif %}
+      {%   if 'annotations' in kubernetes_standalone_pod %}
+          {{ kubernetes_standalone_pod.annotations | default({}) | to_nice_yaml(indent=2) | indent(4) }}{% endif %}
+      {% endif %}
+      spec:
+        {{ kubernetes_standalone_pod.spec | indent(2) }}
+    dest: "/etc/kubernetes/manifests/{{ kubernetes_standalone_pod.name }}.yml"