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This hack solves the problem of Docker containers running under systemd and wishing to make use of sd_notify facility. Because Docker containers end up running as child processes of Docker daemon, they are in a cgroup different from that of the service. systemd will thus not process sd_notify events from them.
This utility will proxy events between Docker container and systemd. It is launched with name of proxy socket and a command to execute. It will then start listening on the proxy socket and execute the command.
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