You need to inspect the rootfs log, to find out precisely why they are failing. Placing things into _ontarget() is only a part of the instruction, and applicable only when postinsts have a genuine need to be executed on the target device. I think your situation is explained by this:

If deferring to first boot wasn't the intent, then scriptlet failure may mean an issue in the recipe, or a regression elsewhere.
 
Details of the failure are in /home/build_arm-cortex-a8/tmp/work/arm_cortex_a8-poky-linux-gnueabi/custom-image/1.0-r0/temp/log.do_rootfs.

Alex

On Tue, 12 Feb 2019 at 11:11, Dhanush K.S <dhanush.ks@gmail.com> wrote:
Hello,

Building an image with Yocto Sumo throws out some warning messages during do.rootfs. Although I'm partially clear that update-alternatives has something to do with these warnings, but following the instructions in the warning and placing the packages in pkg_postinst_ontarget_${PN} () does not resolve the issue.

What am I missing here and what is the ideal solution to avoid these warnings?

Here is my BUILD INFORMATION

Build Configuration:
BB_VERSION           = "1.37.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "universal-4.8"
TARGET_SYS           = "arm-poky-linux-gnueabi"
MACHINE              = "arm-cortex-a8"
DISTRO               = "poky"
DISTRO_VERSION       = "2.5"
TUNE_FEATURES        = "arm armv7a vfp neon callconvention-hard cortexa8"
TARGET_FPU           = "hard"
meta-custombsp-ti        
meta                 
meta-poky            
meta-yocto-bsp       
meta-custom-common      = "<unknown>:<unknown>"
meta-oe              = "master:45ee3c0e98bd3ed81419aaeae1e7324e486161a2"

WARNING: custom-image-1.0-r0 do_rootfs: Intentionally failing postinstall scriptlets of ['vsftpd', 'dropbear', 'chrony'] to defer them to first boot is deprecated. Please place them into pkg_postinst_ontarget_${PN} ().
 
If deferring to first boot wasn't the intent, then scriptlet failure may mean an issue in the recipe, or a regression elsewhere.
 
Details of the failure are in /home/build_arm-cortex-a8/tmp/work/arm_cortex_a8-poky-linux-gnueabi/custom-image/1.0-r0/temp/log.do_rootfs.
 
WARNING: custom-image-1.0-r0 do_rootfs: [log_check] abkdkj-image: found 4 warning messages in the logfile:
 
[log_check] warning: %post(vsftpd-3.0.3-r0.cortexa8hf_neon) scriptlet failed, exit status 1
 
[log_check] warning: %post(dropbear-2017.75-r0.cortexa8hf_neon) scriptlet failed, exit status 1
 
[log_check] warning: %post(chrony-3.1-r0.cortexa8hf_neon) scriptlet failed, exit status 1
 
[log_check] WARNING: Intentionally failing postinstall scriptlets of ['vsftpd', 'dropbear', 'chrony'] to defer them to first boot is deprecated. Please place them into pkg_postinst_ontarget_${PN} ().



Thanks,
Dhanush
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