使用 yocto 在启动时使用 systemd 运行 initscript

Question

我想设置一个自定义初始化脚本，以便在启动时使用 yocto 在映像中运行，我遵循了correct answer here - 它与我想要的相同 - 因为我使用 pyro 版本，所以我在本地设置了这些变量.conf 文件，如文档中所述

DISTRO_FEATURES_append = "systemd"

VIRTUAL-RUNTIME_init_manager = "systemd"

DISTRO_FEATURES_BACKFILL_CONSIDERED = "sysvinit"

VIRTUAL-RUNTIME_initscripts = ""

问题是系统启动时未调用 initscript.service，尽管脚本和服务文件已传输且 systemd 存在，但我在 /var/log/messages 中找不到任何内容。

我也试过用这个选项代替 yocto 中的 init

pkg_postinst_keyfile() { #where keyfile is a recipe is added to IMAGE_INSTALL_append
    if [ x"$D" = "x" ]; then
      logger "key file is added"
    else
      exit 1
    fi
}

再一次，我在日志中找不到“添加密钥文件”的语句，尽管执行了配方并且密钥文件按照配方的预期传输到图像。

那么，正确答案有问题吗？我认为它很好，但我不知道问题出在哪里。如果有人可以给我一个使用 Vinit 进行等效操作的可靠示例？

目标机器是“qemux86-64”

食谱

我有一个叫做 meta-mylayer 的层，它的树是：

conf/layer.conf

recipes-core/mylayer-initscript/（如上述链接所述）

recipes-core/images/apt-image.bb

apt-image 是我在 core-minimal 及其内容之上构建的图像

    SUMMARY = "An image which add the support of using deb package management"

inherit core-image
include recipes­core/images/core­-image-­minimal.bb

IMAGE_FEATURES += "package-management"
IMAGE_INSTALL_append = "gnupg coreutils keyfile initscript"

IMAGE_LINGUA = " "

LICENSE = "MIT"

IMAGE_ROOTFS_SIZE ?= "16192"


PACKAGE_FEED_URIS = "http://<public ip here>/my-repo/yahia-repo/expiremental \"
PACKAGE_FEED_BASE_PATHS = "deb"
PACKAGE_FEED_ARCHS = "all"

pkg_postinst_keyfile() {
    if [ x"$D" = "x" ]; then
      logger "key file is added"
    else
      exit 1
    fi
}

initscript 配方和所有文件与链接中所述相同，没有变化。

如果您对 keyfile 配方感兴趣，这里是它

#
# The goal of this recipe is to move keyFile to target machine so it can be used as public key for 
# authoriztion of deb repo.
#
# Author: Yahia Farghaly

SUMMARY = "Move keyFile example to /deb_key"
SECTION = "examples"
LICENSE = "MIT"
LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/MIT;md5=0835ade698e0bcf8506ecda2f7b4f302"

SRC_URI = "file://keyFile \
           file://sources.list"

#to inform yocto where to package the file
FILES_${PN} += " /deb_key"

S = "${WORKDIR}"


do_install() {
         install -d ${D}/deb_key
         install -m 0755 keyFile ${D}/deb_key
}

当然，我会bitbake apt-image

服务脚本

[Unit]
Description=start initscript upon first boot

[Service]
Type=simple
ExecStart=/bin/sh -c 'sleep 5 ; /usr/sbin/initscript.sh'

initscript.h

#!/bin/sh

logger "starting initscript"

# do some work here. Mount rootfs as rw if needed.

logger "initscript work done"
echo "hi yahia" > /deb_key/hello

我不确定 yocto 的 rootfs 结果默认是 rw 还是 r-only ？

初始化脚本配方

SUMMARY = "Initial boot script"
DESCRIPTION = "Script to do any first boot init, started as a systemd service which removes itself once finished"
LICENSE = "CLOSED"
PR = "r3"

SRC_URI =  " \
    file://initscript.sh \
    file://initscript.service \
"

inherit allarch systemd

NATIVE_SYSTEMD_SUPPORT = "1"
SYSTEMD_PACKAGES = "${PN}"
SYSTEMD_SERVICE_${PN} = "initscript.service"

do_compile () {
}

do_install () {
    install -d ${D}/${sbindir}
    install -m 0755 ${WORKDIR}/initscript.sh ${D}/${sbindir}

    install -d ${D}${systemd_unitdir}/system/
    install -m 0644 ${WORKDIR}/initscript.service ${D}${systemd_unitdir}/system
}

Answer 1

对服务脚本进行以下更改后对我有用。

[Unit]
Description=start initscript upon first boot

[Service]
Type=simple
ExecStart=/bin/sh -c 'sleep 5 ; /usr/sbin/initscript.sh'

[Install]
WantedBy=multi-user.target