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OpenVZ dnsmasq set capabilities failed fix

Published: 14-08-2013 | Author: Remy van Elst | Text only version of this article


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When running dnsmasq under OpenVZ I sometimes get an error when restarting: setcapabilities failed. This is because dnsmasq starts as root, then doesprivileged stuff and then drops to the configured run user. In OpenVZ thesepermissions are not passed to the VPS, sadly. These three commands fix theproblem.

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Replace 195 with your container ID in the steps below.

Stop the container:

vzctl stop 195

Give it extra permissions:

vzctl set 195 --capability setuid:on --savevzctl set 195 --capability net_admin:on --savevzctl set 195 --capability net_raw:on --save

Then start it again:

vzctl start 195
Tags: dhcp, dns, dnsmasq, kernel, openvz, snippets, virtualization