change_resolv_conf() function in network-functions corrupts /etc/resolv.conf leaving only option settings

Solution Verified - Updated -

Issue

  • The function change_resolv_conf() in /etc/sysconfig/network-scripts/network-functions deletes all rows from /etc/resolv.conf except options when it's defined. For example, consider /etc/resolv.conf has the following contents:

    Raw
    # cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search pnq.redhat.com. redhat.com. csb
nameserver 192.168.10.10
nameserver 192.168.10.11
options timeout:1

  • By restarting the network service or recycling a network interface, the contents gets rewritten as follows:

    Raw
    # cat /etc/resolv.conf
options timeout:1

Environment

  • Red Hat Enterprise Linux 7
    • initscripts-9.49.24-1.el7 (or older)
    • grep version 2.20 (or newer)
  • Red Hat Enterprise Linux 6
    • initscripts < 9.03.49-1.el6 (or older)
    • grep version 2.20 (or newer)

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