no crashdump created when using auto install on ZFS mirror

w0w

Tested also on virtual machine.
Install 2.8 selecting Autoinstall ZFS, select zfs mirror, select disks.
Try to produce crash dump issuing command

sysctl debug.kdb.enter=1

System begins to dump
Expected behavior is /var/crash should contain crash dump, but nothing created or created removed for unknown reason.

w0w

Savecore result

w0w

The problem is that if we have multiple swap devices, but saving dump on the first, the original script create symlinks twice and then we have wrong device for the savecore. I fixed that by

rc.dumpon

This is what working for me

dumpon_try()
{
    local dump_device="$1"

    if /sbin/dumpon "$dump_device" ; then
        # Create a symlink in devfs for savecore only if it doesn't exist
        if [ ! -e "/dev/dumpdev" ]; then
            ln -s "$dump_device" /dev/dumpdev
        fi
        # Print a message for each dump device found
        echo "Using $dump_device for dump device."
        return 0
    fi

    echo "Unable to specify $dump_device as a dump device."
    return 1
}

w0w

https://redmine.pfsense.org/issues/14767

NollipfSense

@w0w said in no crashdump created when using auto install on ZFS mirror:

Install 2.8

May I asked how did you get 2.8dev image? just checked and not available...

w0w

@NollipfSense
I don't know. I am sure it was available at the moment of this testing.

https://snapshots.netgate.com/amd64/pfSense_master/installer/

NollipfSense

@w0w Thanks for the link but, it seems that it's still down.

w0w

@NollipfSense
Sorry for the late response, but works for me just fine… There is something blocking it just for you.

NollipfSense

@w0w said in no crashdump created when using auto install on ZFS mirror:

There is something blocking it just for you.

Yes, you were correct...had to add snapshots.netgate.com to DNSBL whitelist and glad you mentioned that, thank you!

NollipfSense

So, I have installed it, not sure why now that it's clear a waste of valuable time to participate.