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Allows for binding privileged ports as consul user. #37
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Listening on TCP/UDP ports below 1024 require to be the root user or to have the CAP_NET_BIND_SERVICE Linux capability. Currently Consul is run as the consul user. As an example when a privileged port is configured for DNS, the following error is reported upon container start: ==> Starting Consul agent... ==> Starting Consul agent RPC... ==> Error starting dns server: dns udp setup failed: listen udp 0.0.0.0:53: bind: permission denied This commit grants the CAP_NET_BIND_SERVICE capability to the /bin/consul binary.
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This takes #24 and makes it opt-in via an environment variable.
Closes #24
Closes #15
/cc @jefferai