[Unit]
Description=libvirt Cloud Hypervisor daemon
Documentation=man:virtchd(8)
Documentation=https://libvirt.org/
BindsTo=virtchd.socket
Wants=virtchd-ro.socket
Wants=virtchd-admin.socket
After=virtchd.socket
After=virtchd-ro.socket
After=virtchd-admin.socket
Conflicts=libvirtd.service
After=libvirtd.service
After=network.target
After=dbus.service
After=apparmor.service
Wants=systemd-machined.service
After=systemd-machined.service
After=remote-fs.target

[Service]
Type=notify-reload
Environment=VIRTCHD_ARGS="--timeout 120"
EnvironmentFile=-/etc/sysconfig/virtchd
ExecStart=/usr/bin/virtchd $VIRTCHD_ARGS
ExecReload=/bin/kill -HUP $MAINPID
Restart=on-failure
KillMode=process
# Raise hard limits to match behaviour of systemd >= 240.
# During startup, daemon will set soft limit to match hard limit
# per systemd recommendations
LimitNOFILE=1024:524288
# The cgroups pids controller can limit the number of tasks started by
# the daemon, which can limit the number of domains for some hypervisors.
# A conservative default of 8 tasks per guest results in a TasksMax of
# 32k to support 4096 guests.
TasksMax=32768
# With cgroups v2 there is no devices controller anymore, we have to use
# eBPF to control access to devices. In order to do that we create a eBPF
# hash MAP which locks memory. The default map size for 64 devices together
# with program takes 12k per guest. After rounding up we will get 64M to
# support 4096 guests.
LimitMEMLOCK=64M

[Install]
WantedBy=multi-user.target
Also=virtchd.socket
Also=virtchd-ro.socket
Also=virtchd-admin.socket