Add troubleshooting section for Ubuntu DNS issues
This patch adds a section to troubleshooting in the README, covering a problem caused by local DNS caching in Ubuntu. Change-Id: I8c06b6fb378fcb22b929c25577b96760a7c85046
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@ -639,3 +639,12 @@ Connect to the remote console as described in `Troubleshooting PXE boot`_ to
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see what is going on with the ramdisk. The ramdisk drops into emergency shell
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on failure, which you can use to look around. There should be file called
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``logs`` with the current ramdisk logs.
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Troubleshooting DNS issues on Ubuntu
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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Ubuntu uses local DNS caching, so tries localhost for DNS results first
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before calling out to an external DNS server. When DNSmasq is installed and
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configured for use with ironic-inspector, it can cause problems by interfering
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with the local DNS cache. To fix this issue ensure that ``/etc/resolve.conf``
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points to your external DNS servers and not to ``127.0.0.1``.
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