[RFC PATCH 2/2] logging: add virtlogcleaner service

[Nikolay Shirokovskiy]

It will clean log files of qemu processes that are outdated. Here it
means that VM where not active for given amount time (currently
hardcoded to a month).
---
 src/logging/meson.build               | 15 +++++++++++++++
 src/logging/virtlogcleaner.service.in |  7 +++++++
 src/logging/virtlogcleaner.sh         |  9 +++++++++
 src/logging/virtlogcleaner.timer      |  8 ++++++++
 src/logging/virtlogd.service.in       |  1 +
 5 files changed, 40 insertions(+)
 create mode 100644 src/logging/virtlogcleaner.service.in
 create mode 100755 src/logging/virtlogcleaner.sh
 create mode 100644 src/logging/virtlogcleaner.timer

diff --git a/src/logging/meson.build b/src/logging/meson.build
index 7066f16fad..d23f51b9fd 100644
--- a/src/logging/meson.build
+++ b/src/logging/meson.build
@@ -101,6 +101,21 @@ if conf.has('WITH_LIBVIRTD')
     'name': 'virtlogd',
     'in_file': files('virtlogd.init.in'),
   }
+
+  if init_script == 'systemd'
+    systemd_unit_dir = prefix / 'lib' / 'systemd' / 'system'
+
+    configure_file(
+      input: 'virtlogcleaner.service.in',
+      output: 'virtlogcleaner.service',
+      configuration: configuration_data({'sbindir': sbindir}),
+      install: true,
+      install_dir: systemd_unit_dir,
+    )
+
+    install_data('virtlogcleaner.timer', install_dir: systemd_unit_dir)
+    install_data('virtlogcleaner.sh', install_dir: sbindir)
+  endif
 endif
 
 log_inc_dir = include_directories('.')
diff --git a/src/logging/virtlogcleaner.service.in b/src/logging/virtlogcleaner.service.in
new file mode 100644
index 0000000000..1d1ff2b121
--- /dev/null
+++ b/src/logging/virtlogcleaner.service.in
@@ -0,0 +1,7 @@
+[Unit]
+Description=Virtual machine log cleaner
+Documentation=https://libvirt.org
+
+[Service]
+Type=oneshot
+ExecStart=@sbindir@/virtlogcleaner.sh
diff --git a/src/logging/virtlogcleaner.sh b/src/logging/virtlogcleaner.sh
new file mode 100755
index 0000000000..21ddefb15a
--- /dev/null
+++ b/src/logging/virtlogcleaner.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+logdir=/var/log/libvirt/qemu
+
+cd "$logdir"
+find . -mtime +30 -name "*.log" | while read file
+do
+    find . -regex "$file.[0-9]*" -delete && rm "$file"
+done
diff --git a/src/logging/virtlogcleaner.timer b/src/logging/virtlogcleaner.timer
new file mode 100644
index 0000000000..a916f05f87
--- /dev/null
+++ b/src/logging/virtlogcleaner.timer
@@ -0,0 +1,8 @@
+[Unit]
+Description=Periodic cleanup of virtual machine logs
+Documentation=https://libvirt.org
+
+[Timer]
+OnCalendar=daily
+AccuracySec=1h
+Persistent=true
diff --git a/src/logging/virtlogd.service.in b/src/logging/virtlogd.service.in
index 8ab5478517..e1883b73be 100644
--- a/src/logging/virtlogd.service.in
+++ b/src/logging/virtlogd.service.in
@@ -2,6 +2,7 @@
 Description=Virtual machine log manager
 Requires=virtlogd.socket
 Requires=virtlogd-admin.socket
+Requires=virtlogcleaner.timer
 Before=libvirtd.service
 Documentation=man:virtlogd(8)
 Documentation=https://libvirt.org
-- 
2.31.1