Bug 102394
| Summary: | [dhclient] resolv.conf issue | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Dan Morrill <morrildl> |
| Component: | dhcp | Assignee: | Daniel Walsh <dwalsh> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 9 | Keywords: | FutureFeature |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Enhancement | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2003-08-22 19:07:25 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Instead of adding your patch I added a variable SEARCH that can be set in the ifcfg-* file. If this is set then it will be added to the /etc/resolv.conf, otherwise it will work as it currently does. So if you were using eth0 you could add the following to it SEARCH="somedomain.tld foo.dhcp.somedomain.tld" Available in dhcp-3.0pl2-6.13.src.rpm. An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2004-566.html |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4b) Gecko/20030625 Mozilla Firebird/0.6 Description of problem: *Note: this is not a bug in dhcp, this is a bug in dhclient. However, there appears to be no dhclient package in the Bugzilla list, so I chose this as a best guess.* When dhclient updates /etc/resolv.conf, it overwrites whatever is there with no opportunity to include or preserve any of its contents. In some cases, network admins set up DHCP systems to exist in a separate subdomain: e.g. if the organization's domain is "somedomain.tld", then they might use "foo.somedomain.tld" for static IP addresses, and "foo.dhcp.somedomain.tld" for DHCP-assigned addresses. In this case, /etc/resolv.conf should include "search" entries for both "somedomain.tld" and "dhcp.somedomain.tld". However, /sbin/dhclient-script will only add "somedomain.tld". See the attached patch, which is a trivial modification to /sbin/dhclient-script to include the contents of /etc/sysconfig/resolv.conf in /etc/resolv.conf, if and only if the file in sysconfig exists. Please include this patch or another like it in the next build of dhclient RPM. Thanks! - Dan Morrill Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. echo "search dhcp.somedomain.tld" >> /etc/resolv.conf 2. ifdown eth0; ifup eth0 # if eth0 is a DHCP interface 3. observe that dhcp.somedomain.tld is no longer in resolv.conf Actual Results: /sbin/dhclient-script overwrites /etc/resolv.conf w/ no mechanism to include arbitrary lines in it. Expected Results: There needs to be a way to include persistent lines in /etc/resolv.conf (esp. "search" entries.) Additional info: --- dhclient-script 2003-08-14 13:55:42.000000000 -0400 +++ /sbin/dhclient-script 2003-08-14 13:56:34.000000000 -0400 @@ -24,6 +24,9 @@ function make_resolv_conf() { if [ -n "$new_domain_name" ] || [ -n "$new_domain_name_servers" ]; then echo '; generated by /sbin/dhclient-script' > /etc/resolv.conf + if [ -f /etc/sysconfig/resolv.conf ]; then + cat /etc/sysconfig/resolv.conf >> /etc/resolv.conf + fi if [ -n "$new_domain_name" ]; then echo search $new_domain_name >> /etc/resolv.conf fi