add 'btrfs' role, move vars to host_vars

host_vars/lalilulelo.yml

@@ -0,0 +1,23 @@
+---
+tuned_base_profile: "network-latency"
+tuned_custom_profile:
+  name: tweaks
+  sections:
+    - name: main
+      params:
+        - option: summary
+          value: "Boosts RAID and iGPU speeds, managed by Ansible"
+        - option: include
+          value: "{{ tuned_base_profile }}"
+    - name: sysctl
+      params:
+        - option: dev.raid.speed_limit_min
+          value: "1000000"
+        - option: dev.raid.speed_limit_max
+          value: "9500000"
+        - option: net.core.somaxconn
+          value: "16384"
+    - name: sysfs
+      params:
+        - option: /sys/class/drm/*/device/power_dpm_force_performance_level
+          value: highest

host_vars/workstation.yml

@@ -0,0 +1,43 @@
+---
+tuned_base_profile: "network-latency"
+tuned_custom_profile:
+  name: tweaks
+  sections:
+    - name: main
+      params:
+        - option: summary
+          value: "Ansible-managed/customized profile"
+        - option: include
+          value: "{{ tuned_base_profile }}"
+    - name: virtsched
+      params:
+        - option: type
+          value: "disk"
+        - option: devices_udev_regex
+          value: "(ID_MODEL=QEMU_HARDDISK)|(ID_VENDOR=HC)"
+        - option: elevator
+          value: "mq-deadline"
+    - name: ssdnosched
+      params:
+        - option: type
+          value: "disk"
+        - option: devices_udev_regex
+          value: "(ID_ATA_ROTATION_RATE_RPM=0)"
+        - option: elevator
+          value: "none"
+    - name: sysctl
+      params:
+        # - option: net.core.default_qdisc
+        #  value: "fq"
+        # - option: net.ipv4.tcp_congestion_control
+        #  value: "bbr"
+        # - option: net.core.rmem_max
+        #  value: "4194304"
+        # - option: net.core.wmem_max
+        #  value: "1048576"
+        - option: dev.raid.speed_limit_min
+          value: "600000"
+        - option: dev.raid.speed_limit_max
+          value: "9000000"
+        - option: net.core.somaxconn
+          value: "8192"

play.yml

@@ -3,57 +3,15 @@
   gather_facts: yes
   vars:
 #    auto_update: "true"  # would configure dnf-automatic
-    hardened_ssh_port: "1181" # tcp is assumed in selinux/firewalld allowance
+#    hardened_ssh_port: "1181" # tcp is assumed in selinux/firewalld allowance
     URL_PUBKEYS: "https://github.com/joshlay.keys" # https://github.com/user.keys
-    tuned_base_profile: "network-latency"
-    tuned_custom_profile:
-      name: tweaks
-      sections:
-        - name: main
-          params:
-            - option: summary
-              value: "Custom tuned profile created by jlay - virt. IO scheduler, TCP, etc"
-            - option: include
-              value: "{{ tuned_base_profile }}"
-        - name: virtsched
-          params:
-            - option: type
-              value: "disk"
-            - option: devices_udev_regex
-              value: "(ID_MODEL=QEMU_HARDDISK)|(ID_VENDOR=HC)"
-            - option: elevator
-              value: "mq-deadline"
-        - name: ssdnosched
-          params:
-            - option: type
-              value: "disk"
-            - option: devices_udev_regex
-              value: "(ID_ATA_ROTATION_RATE_RPM=0)"
-            - option: elevator
-              value: "none"
-        - name: sysctl
-          params:
-            - option: net.core.default_qdisc
-              value: "fq"
-            - option: net.ipv4.tcp_congestion_control
-              value: "bbr"
-            - option: net.core.rmem_max
-              value: "4194304"
-            - option: net.core.wmem_max
-              value: "1048576"
-            - option: dev.raid.speed_limit_min
-              value: "600000"
-            - option: dev.raid.speed_limit_max
-              value: "9000000"
-            - option: net.core.somaxconn
-              value: "8192"
   roles:
-#    - {role: btrfs}  # sets up scrubbing
+    - {role: btrfs}  # sets up scrubbing
     - {role: bootstrap}
     - {role: tuned}
     - {role: install-packages}
     - {role: update-packages} # depends on 'is_atomic' in bootstrap
     - {role: fedora-upgrade} # consider renaming to dist-upgrade / supporting more than fedora
-    - {role: create-user}
+    - {role: create-user}  # this should always follow packages; they often provide groups the user may want to join
     - {role: hardening}
     - {role: docker}

roles/btrfs/files/btrfs-scrub@.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Btrfs scrub on %f
+ConditionPathIsMountPoint=%f
+RequiresMountsFor=%f
+
+[Service]
+Nice=19
+IOSchedulingClass=idle
+KillSignal=SIGINT
+ExecStart=/usr/bin/btrfs scrub start -B %f

roles/btrfs/files/btrfs-scrub@.timer

@@ -0,0 +1,11 @@
+[Unit]
+Description=Monthly Btrfs scrub on %f
+
+[Timer]
+OnCalendar=monthly
+AccuracySec=1d
+RandomizedDelaySec=1w
+Persistent=true
+
+[Install]
+WantedBy=timers.target

roles/btrfs/handlers/main.yml

@@ -0,0 +1,5 @@
+- name: Reload systemd
+  ansible.builtin.systemd:
+    daemon_reload: true
+  become: true
+  listen: daemon_reload

roles/btrfs/tasks/main.yml

@@ -0,0 +1,32 @@
+- name: Setup scrub units
+  ansible.builtin.copy:
+    src: "{{ item }}"
+    dest: /etc/systemd/system/
+    mode: "0644"
+    owner: root
+    group: root
+  with_items:
+    - 'btrfs-scrub@.service'
+    - 'btrfs-scrub@.timer'
+  notify: daemon_reload
+  become: true
+
+- name: Run pending handlers
+  ansible.builtin.meta: flush_handlers
+
+- name: Determine btrfs mounts
+  ansible.builtin.set_fact:
+    btrfs_mounts: "{{ ansible_facts['mounts'] | selectattr('fstype', 'equalto', 'btrfs') | map(attribute='mount') | list }}"
+
+- name: Determine systemd-friendly refs for BTRFS mount points
+  ansible.builtin.command: "systemd-escape -p -- {{ item }}"
+  register: sanitized_mounts
+  loop: "{{ btrfs_mounts }}"
+  changed_when: false
+
+- name: Ensure the scrub timer is enabled for discovered BTRFS filesystems
+  ansible.builtin.systemd:
+    name: "btrfs-scrub@{{ item.stdout }}.timer"
+    enabled: true
+  with_items: "{{ sanitized_mounts.results }}"
+  become: true