f764a167ac
We noticed in tests/production that there is a low probability failure where /etc/hosts could have some garbage characters before the entry for local host name. The consequence is that all sudo command would be very slow. In extreme cases it would prevent some services from starting properly. I suspect that the /etc/hosts file might be opened by some process causing the issue. Editing contents with new file level and replace the whole file should be safer. Signed-off-by: Ying Xie <ying.xie@microsoft.com>
23 lines
711 B
Bash
Executable File
23 lines
711 B
Bash
Executable File
#!/bin/bash -e
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CURRENT_HOSTNAME=`hostname`
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HOSTNAME=`sonic-cfggen -d -v DEVICE_METADATA[\'localhost\'][\'hostname\']`
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echo $HOSTNAME > /etc/hostname
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hostname -F /etc/hostname
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# Remove the old hostname entry from hosts file.
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# But, 'localhost' entry is used by multiple applications. Don't remove it altogether.
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# Edit contents of /etc/hosts and put in /etc/hosts.new
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if [ $CURRENT_HOSTNAME != "localhost" ] || [ $CURRENT_HOSTNAME == $HOSTNAME ] ; then
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sed "/\s$CURRENT_HOSTNAME$/d" /etc/hosts > /etc/hosts.new
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else
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cp -f /etc/hosts /etc/hosts.new
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fi
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echo "127.0.0.1 $HOSTNAME" >> /etc/hosts.new
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# Swap file: hosts.new and hosts
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mv -f /etc/hosts /etc/hosts.old
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mv -f /etc/hosts.new /etc/hosts
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