0177e24 Use the same /etc/resolve.conf in kdump initrd if it's managed manually

Authored and Committed by coiby 4 months ago
    Use the same /etc/resolve.conf in kdump initrd if it's managed manually
    
    Resolves: https://issues.redhat.com/browse/RHEL-11897
    
    Some users may choose to manage /etc/resolve.conf manually [1]
    by setting dns=none or use a symbolic link resolve.conf [2].
    In this case, network dumping will not work because DNS resolution
    fails. Use the same /etc/resolve.conf in kdump initrd to fix this
    problem.
    
    [1] https://bugzilla.gnome.org/show_bug.cgi?id=690404
    [2] https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/manually-configuring-the-etc-resolv-conf-file_configuring-and-managing-networking
    
    Fixes: 63c3805c ("Set up kdump network by directly copying NM connection profile to initrd")
    Reported-by: Curtis Taylor <cutaylor@redhat.com>
    Cc: Jie Li <jieli@redhat.com>
    Signed-off-by: Coiby Xu <coxu@redhat.com>
    Reviewed-by: Dave Young <dyoung@redhat.com>
    
        
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