Recursive DNS Server Behavior Change After 3.3.x to 3.4.0 Upgrade

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Eucalyptus Affected Versions: 3.3.0 to 3.4.0

Recursive DNS Server Behavior Change After 3.3.x to 3.4.0 Upgrade

If the /etc/resolv.conf on the CLC has been configured to use itself (i.e. IP of CLC) in a Eucalyptus 3.3.x cloud as a nameserver, after upgrading to Eucalyptus 3.4.0, users will have to define recursive DNS servers in CLOUD_OPTS in the eucalyptus.conf on the CLC.

To resolve this issue, please add the desired recursive DNS servers into the CLOUD_OPTS variable in the CLC eucalyptus.conf file:

-Ddns.server=DNS_SERVER1,DNS_SERVER2,.. -Ddns.search=DNS_DOMAIN

For example, if a user wanted the recursive DNS servers to be 8.8.8.8 and 8.8.4.4, and had a search domain of acme.org, the entry would look like the following: 

CLOUD_OPTS="-Ddns.server=8.8.8.8,8.8.4.4 -Ddns.search=acme.org"

References

For additional information, please refer to the ticket entitled "DNS nameserver switches hosts after upgrade" in Eucalyptus Jira Bug Tracker.

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