From ce819aebdac5acb1b6515f0066288b04f0f881aa Mon Sep 17 00:00:00 2001
From: Maximilian Kratz <account@maxkratz.com>
Date: Thu, 30 Mar 2023 09:08:40 +0200
Subject: [PATCH] Enables swap

Fixes wrong path in swapfile
---
 infra.yaml                   |  2 ++
 inventory/group_vars/all.yml |  7 +++++++
 roles/swap/tasks/main.yml    | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+)
 create mode 100644 roles/swap/tasks/main.yml

diff --git a/infra.yaml b/infra.yaml
index f710784..17a3e36 100644
--- a/infra.yaml
+++ b/infra.yaml
@@ -24,3 +24,5 @@
     - role: firewall
       when: "role_config.firewall_enable"
       become: true
+    - role: swap
+      become: true
diff --git a/inventory/group_vars/all.yml b/inventory/group_vars/all.yml
index 2a922a1..f5e0e00 100644
--- a/inventory/group_vars/all.yml
+++ b/inventory/group_vars/all.yml
@@ -33,3 +33,10 @@ migration_url: "s3-mig.forgejo.dev"
 
 forgejo_ssh_port: "22"
 forgejo_release: "1.19.0-2"
+
+#
+# Swap config
+#
+
+swap_size: "2048"
+swap_file: "/swapfile"
diff --git a/roles/swap/tasks/main.yml b/roles/swap/tasks/main.yml
new file mode 100644
index 0000000..0216774
--- /dev/null
+++ b/roles/swap/tasks/main.yml
@@ -0,0 +1,36 @@
+---
+- name: Check if the swap file exists
+  ansible.builtin.stat:
+    path: "{{ swap_file }}"
+  register: swap_file_check
+
+- name: Create the swap file
+  ansible.builtin.command: fallocate -l {{ swap_size }}M {{ swap_file }}
+  when: not swap_file_check.stat.exists
+
+- name: Create the wap space
+  ansible.builtin.command: dd if=/dev/zero of={{ swap_file }} bs=1M count={{ swap_size }}
+  when: not swap_file_check.stat.exists
+
+- name: Set permissions on swap file
+  ansible.builtin.file:
+    path: "{{ swap_file }}"
+    mode: 0600
+
+- name: Format the swap file
+  ansible.builtin.command: mkswap {{ swap_file }}
+  when: not swap_file_check.stat.exists
+
+- name: Add swap to fstab
+  ansible.builtin.lineinfile:
+    dest: /etc/fstab
+    regexp: "{{ swap_file }}"
+    line: "{{ swap_file }} none swap sw 0 0"
+
+- name: Turn on swap
+  ansible.builtin.command: swapon -a
+
+- name: Set swapiness level
+  ansible.posix.sysctl:
+    name: vm.swappiness
+    value: "60"