btrfs maintenance scripts

deploy.yml

@@ -111,7 +111,6 @@
   hosts:
     - pikvm
   become: true
-  hosts: pikvm
   vars:
     domain: monotremata.xyz
 

roles/cryptoraid/files/bin/btr_balance.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -e
+
+BTRFS_ROOT="${BTRFS_ROOT:-/mnt/btr_pool}"
+
+btrfs -v balance start --background "$BTRFS_ROOT"
+
+# shellcheck disable=SC2064
+trap "btrfs balance cancel $BTRFS_ROOT" INT
+
+printf '=================\n'
+while ! btrfs -v balance status "$BTRFS_ROOT"; do
+    printf '________________\n'
+    sleep 60
+done
+printf '=================\n'

roles/cryptoraid/files/bin/btr_defrag.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e
+
+defragment() {
+    btrfs filesystem defragment -v -r -czstd "$@"
+}
+
+list_subvols() {
+    btrfs subvolume list "$@" | awk '{ print $9 }'
+}
+
+is_readonly() {
+    btrfs subvolume show "$@" | grep -q "readonly"
+}
+
+BTRFS_ROOT="${BTRFS_ROOT:-/mnt/btr_pool}"
+
+for subvol in $(list_subvols "$BTRFS_ROOT"); do
+    subvol_path="$BTRFS_ROOT"/"$subvol"
+    is_readonly "$subvol_path" || defragment "$subvol_path"
+done

roles/cryptoraid/files/bin/btr_scrub.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+set -e
+
+scrub_status() {
+    btrfs scrub status "$@" |
+        tee /dev/stderr |
+        grep "^Status:" |
+        awk '{ print $2}'
+}
+
+BTRFS_ROOT="${BTRFS_ROOT:-/mnt/btr_pool}"
+
+btrfs scrub start "$BTRFS_ROOT"
+sleep 10
+
+# shellcheck disable=SC2064
+trap "btrfs scrub cancel $BTRFS_ROOT" INT
+
+printf '=================\n'
+while [ "$(scrub_status "${BTRFS_ROOT}")" = "running" ]; do
+    printf '________________\n'
+    sleep 60
+done
+printf '=================\n'

roles/cryptoraid/files/bin/fs_trim.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -e
+
+FS_ROOT="${BTRFS_ROOT:-/mnt/btr_pool}"
+fstrim -v "$FS_ROOT"

roles/cryptoraid/tasks/alpine.yml

@@ -2,6 +2,7 @@
 - name: install packages
   apk:
     name:
+      - btrbk
       - btrfs-progs
       - cryptsetup
       - gnupg

roles/cryptoraid/tasks/main.yml

@@ -2,3 +2,14 @@
 - name: alpine setup
   include_tasks: alpine.yml
   when: ansible_distribution == "Alpine"
+
+- name: copy maintainance scripts
+  copy:
+    src: "bin/{{ item }}"
+    dest: "/usr/local/bin/{{ item }}"
+    mode: "755"
+  loop:
+    - "btr_defrag.sh"
+    - "btr_balance.sh"
+    - "btr_scrub.sh"
+    - "fs_trim.sh"