c70320b5ed
The plugin binary actually functions in two modes. The first mode is a regular CNI plugin. The second mode (when stared with "daemon" arg) runs a DHCP client daemon. When executed as a CNI plugin, it issues an RPC request to the daemon for actual processing. The daemon is required since a DHCP lease needs to be maintained by periodically renewing it. One instance of the daemon can server arbitrary number of containers/leases.
20 lines
421 B
Bash
Executable File
20 lines
421 B
Bash
Executable File
#!/bin/bash -e
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# Run a command in a private network namespace
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# set up by CNI plugins
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contid=$(printf '%x%x%x%x' $RANDOM $RANDOM $RANDOM $RANDOM)
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netnspath=/var/run/netns/$contid
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ip netns add $contid
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ip netns exec $contid ip link set lo up
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./exec-plugins.sh add $contid $netnspath
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function cleanup() {
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./exec-plugins.sh del $contid $netnspath
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ip netns delete $contid
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}
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trap cleanup EXIT
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ip netns exec $contid "$@"
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