From cec888ee4264943f10100571341ddf7481659ee7 Mon Sep 17 00:00:00 2001
From: sluetze <13255307+sluetze@users.noreply.github.com>
Date: Mon, 15 May 2023 14:50:40 +0000
Subject: [PATCH] add gc add-on

---
 .../add-on-roles/garbagecollection/README.md  | 12 +++++++++++
 .../garbagecollection/defaults/main.yml       |  3 +++
 .../garbagecollection/meta/main.yml           | 20 +++++++++++++++++++
 .../garbagecollection/tasks/post-install.yml  | 18 +++++++++++++++++
 ...ter-garbagecollection-machineconfig.yml.j2 | 14 +++++++++++++
 5 files changed, 67 insertions(+)
 create mode 100644 ansible/add-on-roles/garbagecollection/README.md
 create mode 100644 ansible/add-on-roles/garbagecollection/defaults/main.yml
 create mode 100644 ansible/add-on-roles/garbagecollection/meta/main.yml
 create mode 100644 ansible/add-on-roles/garbagecollection/tasks/post-install.yml
 create mode 100644 ansible/add-on-roles/garbagecollection/templates/cluster-garbagecollection-machineconfig.yml.j2

diff --git a/ansible/add-on-roles/garbagecollection/README.md b/ansible/add-on-roles/garbagecollection/README.md
new file mode 100644
index 00000000..c53e9ad1
--- /dev/null
+++ b/ansible/add-on-roles/garbagecollection/README.md
@@ -0,0 +1,12 @@
+# garbagecollection
+
+this add-on adds a KubeConfig Machineconfiguration as per https://cloud.redhat.com/blog/image-garbage-collection-in-openshift
+This can be used to have a tighter garbagecollection for the images. This may be useful in environments with low disk volume
+
+## Role Variables
+
+see [defaults](defaults/main.yml)
+
+## License
+
+Apache 2.0
\ No newline at end of file
diff --git a/ansible/add-on-roles/garbagecollection/defaults/main.yml b/ansible/add-on-roles/garbagecollection/defaults/main.yml
new file mode 100644
index 00000000..5bf98728
--- /dev/null
+++ b/ansible/add-on-roles/garbagecollection/defaults/main.yml
@@ -0,0 +1,3 @@
+garbagecollection_high_treshold_percent: 66
+garbagecollection_low_treshold_percent: 50
+garbagecollection_minimum_age: "5m30s"
\ No newline at end of file
diff --git a/ansible/add-on-roles/garbagecollection/meta/main.yml b/ansible/add-on-roles/garbagecollection/meta/main.yml
new file mode 100644
index 00000000..2200d5de
--- /dev/null
+++ b/ansible/add-on-roles/garbagecollection/meta/main.yml
@@ -0,0 +1,20 @@
+galaxy_info:
+  author: Steffen Luetzenkirchen
+  description: configures tight garbage collection for ocp4
+  company: Red Hat
+
+  license: Apache-2.0
+
+  min_ansible_version: 2.9
+
+  platforms:
+    - name: OpenShift
+      versions:
+        - all
+  galaxy_tags:
+    []
+
+dependencies:
+  []
+  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
+  # if you add dependencies to this list.
\ No newline at end of file
diff --git a/ansible/add-on-roles/garbagecollection/tasks/post-install.yml b/ansible/add-on-roles/garbagecollection/tasks/post-install.yml
new file mode 100644
index 00000000..3f82ff55
--- /dev/null
+++ b/ansible/add-on-roles/garbagecollection/tasks/post-install.yml
@@ -0,0 +1,18 @@
+---
+- name: Ensure GarbageCollection machineconfig
+  delegate_to: localhost
+  kubernetes.core.k8s:
+    state: present
+    kubeconfig: "{{ k8s_kubeconfig }}"
+    host: "{{ k8s_host }}"
+    ca_cert: "{{ k8s_ca_cert }}"
+    client_cert: "{{ k8s_client_cert }}"
+    client_key: "{{ k8s_client_key }}"
+    definition: "{{ lookup('template', 'templates/cluster-garbagecollection-machineconfig.yml.j2') }}"
+  vars:
+    role: "{{ loop_role }}"
+  with_items:
+    - master
+    - worker
+  loop_control:
+    loop_var: loop_role
\ No newline at end of file
diff --git a/ansible/add-on-roles/garbagecollection/templates/cluster-garbagecollection-machineconfig.yml.j2 b/ansible/add-on-roles/garbagecollection/templates/cluster-garbagecollection-machineconfig.yml.j2
new file mode 100644
index 00000000..fd2aa302
--- /dev/null
+++ b/ansible/add-on-roles/garbagecollection/templates/cluster-garbagecollection-machineconfig.yml.j2
@@ -0,0 +1,14 @@
+apiVersion: machineconfiguration.openshift.io/v1
+kind: KubeletConfig
+metadata:
+  labels:
+    machineconfiguration.openshift.io/role: {{ role }}
+  name: 60-{{ role }}-kubeconfig-tight-garbage
+spec:
+  kubeletConfig:
+    imageGCHighThresholdPercent: {{ garbagecollection_high_treshold_percent }}
+    imageGCLowThresholdPercent: {{ garbagecollection_low_treshold_percent }}
+    imageMinimumGCAge: "{{ garbagecollection_minimum_age }} "
+  machineConfigPoolSelector:
+    matchLabels:
+      pools.operator.machineconfiguration.openshift.io/{{ role }}: ""
\ No newline at end of file