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ee3ac3aa66
This adds a small C binary for fighting zombies. It is mounted under
`/dev/init` and is prepended to the args specified by the user. You
enable it via a daemon flag, `dockerd --init`, as it is disable by
default for backwards compat.
You can also override the daemon option or specify this on a per
container basis with `docker run --init=true|false`.
You can test this by running a process like this as the pid 1 in a
container and see the extra zombie that appears in the container as it
is running.
```c
int main(int argc, char ** argv) {
pid_t pid = fork();
if (pid == 0) {
pid = fork();
if (pid == 0) {
exit(0);
}
sleep(3);
exit(0);
}
printf("got pid %d and exited\n", pid);
sleep(20);
}
```
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
16 lines
515 B
Bash
16 lines
515 B
Bash
#!/bin/bash
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set -e
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rm -rf "$DEST"
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(
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DEST="$(dirname $DEST)/binary-daemon"
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source "${MAKEDIR}/.binary-setup"
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install_binary "${DEST}/${DOCKER_DAEMON_BINARY_NAME}"
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install_binary "${DEST}/${DOCKER_RUNC_BINARY_NAME}"
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install_binary "${DEST}/${DOCKER_CONTAINERD_BINARY_NAME}"
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install_binary "${DEST}/${DOCKER_CONTAINERD_CTR_BINARY_NAME}"
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install_binary "${DEST}/${DOCKER_CONTAINERD_SHIM_BINARY_NAME}"
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install_binary "${DEST}/${DOCKER_PROXY_BINARY_NAME}"
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install_binary "${DEST}/${DOCKER_INIT_BINARY_NAME}"
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)
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