yocto systemd can service not start after boot

Question

I try to add can0 to systemd to auto start at boot time on my imx8 board. But I couldnt with these configurations :

$tree recipes-core/
----------------------------------------
recipes-core/
└── systemd
    ├── systemd-machine-units
    │   ├── 10-eth0.network
    │   ├── 10-eth1.network
    │   ├── 90-dhcp-default.network
    │   ├── can0.service
    │   └── can1.service
    └── systemd-machine-units_1.0.bbappend

2 directories, 6 files

$ cat systemd-machine-units_1.0.bbappend 
-------------------------------------------------------------
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

# all our boards have at least one native network port
SRC_URI = " \
    file://10-eth0.network \
    file://90-dhcp-default.network \
    file://10-eth1.network \
    file://can0.service \
    file://can1.service \
"

SYSTEMD_SERVICE_${PN} = "can0.service can1.service"


do_install_append() {
    install -d ${D}${systemd_unitdir}/network/
    install -m 0644 "${WORKDIR}/10-eth0.network" ${D}${systemd_unitdir}/network/
    install -m 0644 "${WORKDIR}/90-dhcp-default.network" ${D}${systemd_unitdir}/network/
    install -m 0644 "${WORKDIR}/10-eth1.network" ${D}${systemd_unitdir}/network/
    install -d ${D}${systemd_system_unitdir}/
    install -m 0644 "${WORKDIR}/can0.service" ${D}${systemd_system_unitdir}/
    install -m 0644 "${WORKDIR}/can1.service" ${D}${systemd_system_unitdir}/

}

FILES_${PN} = "\
    ${systemd_system_unitdir} \
    ${systemd_unitdir}/network/ \
"

$cat can0.service 
--------------------------------------------------------------------------------
# For 2.0B legacy mode, arbitration bit rate (bitrate) and
# payload bit rate (dbitrate) have the same value - not higher than 1Mbps.
# CAN frames are limited to max 8 bytes in this case
# if target does not support FD, fg settings are not accepted by ip link set
[Unit]
Description=can0 interface setup

[Service]
Type=simple
RemainAfterExit=yes
ExecStart=/sbin/ip link set can0 up type can bitrate 500000
ExecStop=/sbin/ip link set can0 down

[Install]
WantedBy=basic.target

search can0.service on target roots but not found :

$cd lib/systemd/ && find -name "*can*"
--------------------------------------------
./system/wpa_supplicant.service
./system/[email protected]
./system/[email protected]
./system/[email protected]

Also I try to add systemd_%.bbappend with these file : (Also systemd tree different with under code. can0.service is under the files folder near to service_%.bbappend file)

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI += "file://can0.service"

SYSTEMD_SERVICE_${PN} = "can0.service can1.service"

FILES_${PN} += "{sysconfdir}/systemd/system/* "

do_install_append() {
    install -d ${D}${systemd_unitdir}/system/
    install -m 0644 ${WORKDIR}/*.service ${D}${systemd_unitdir}/system/
}

can0.service created by above systemd_%.bbappend but not auto start at boot time. Just can0.service seems at /lib/systemd/system folder at target.

What is my mistake? Can somebody help me?

@OleksandrKravchuk Not running. My bbappend not add can0.service to rootfs. — berat yıldız
@OleksandrKravchuk : I finished the build. systemd_%.append add can0.service to /lib/systemd/system as I expected but : $systemctl status can0 says that : ��● can0.service - can0 interface setup Loaded: loaded (/lib/systemd/system/can0.service; disabled; vendor preset: enabled) Active: inactive (dead)Jan 25 21:56:55 tqma8xqp-mba8xx systemd[1]: [[0;1;39m[[0;1;31m[[0;1;39m/lib/systemd/system/can0.service:16: Unknown lvalue 'FILES_${PN} +' in section 'Install'[[0m — berat yıldız

Devesh mehta Devesh mehta · Accepted Answer · 2020-01-26T05:43:09

The cat0 service status posted above shows that the service is not enabled.

You can enable this service using the command systemctl enable cat0 and then try to reboot the system.

The services which are in enable state comes automatically after system reboot.

yocto systemd can service not start after boot

3 Answers