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0b468fb61b
This is a shortcut tool for logging into a container using SSH. Usage: `docker-bash <CONTAINER_ID>`.
83 lines
2.4 KiB
Bash
Executable File
83 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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set -e
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set -o pipefail
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KNOWN_HOSTS_FILE=
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IP=
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function usage()
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{
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echo "Usage: docker-bash <CONTAINER_ID> [COMMAND...]"
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echo "Login to a Baseimage-based Docker container using SSH."
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echo "If COMMAND is not given, opens an interactive shell."
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echo "Otherwise, runs COMMAND inside the container."
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}
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function cleanup()
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{
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local pids=`jobs -p`
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if [[ "$pids" != "" ]]; then
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kill $pids
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fi
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if [[ "$KNOWN_HOSTS_FILE" != "" ]]; then
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rm -f "$KNOWN_HOSTS_FILE"
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fi
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}
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if [[ $# = 0 ]]; then
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usage
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exit
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fi
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CONTAINER_ID="$1"
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shift
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trap cleanup EXIT
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if ! [[ -e ~/.baseimage_docker_insecure_key ]]; then
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if [[ -e /usr/local/share/baseimage-docker/insecure_key ]]; then
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cp /usr/local/share/baseimage-docker/insecure_key ~/.baseimage_docker_insecure_key
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else
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dir=`dirname "$0"`
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dir=`cd "$dir/.." && pwd`
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if [[ -e "$dir/image/insecure_key" ]]; then
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cp "$dir/image/insecure_key" ~/.baseimage_docker_insecure_key
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else
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echo "*** ERROR ***: Baseimage-docker insecure key not found." >&2
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echo "You probably didn't install docker-bash properly. Please reinstall it:" >&2
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echo "" >&2
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echo " curl --fail -L -O https://github.com/phusion/baseimage-docker/archive/master.tar.gz && \\" >&2
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echo " tar xzf master.tar.gz && \\" >&2
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echo " sudo ./baseimage-docker-master/install-tools.sh" >&2
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exit 1
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fi
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fi
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chown "`whoami`": ~/.baseimage_docker_insecure_key
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chmod 600 ~/.baseimage_docker_insecure_key
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fi
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KNOWN_HOSTS_FILE=`mktemp /tmp/docker-bash.XXXXXXXXX`
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IP=`docker inspect -f "{{ .NetworkSettings.IPAddress }}" "$CONTAINER_ID"`
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# Prevent SSH from warning about adding a host to the known_hosts file.
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ssh-keyscan "$IP" >"$KNOWN_HOSTS_FILE" 2>&1
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if ! ssh -i ~/.baseimage_docker_insecure_key \
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-o UserKnownHostsFile="$KNOWN_HOSTS_FILE" \
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-o StrictHostKeyChecking=no \
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-o PasswordAuthentication=no \
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-o KbdInteractiveAuthentication=no \
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-o ChallengeResponseAuthentication=no \
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"root@$IP" "$@"
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then
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STATUS=$?
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if [[ $# = 0 ]]; then
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echo "----------------"
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echo "It appears that login to the Docker container failed. This could be caused by the following reasons:"
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echo "- The Docker container you're trying to login to is not based on Baseimage-docker. The docker-bash tool only works with Baseimage-docker-based containers."
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echo "- You did not enable the the insecure key inside the container. Please read https://github.com/phusion/baseimage-docker/blob/master/README.md#login to learn how to enable the insecure key."
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fi
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exit $STATUS
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fi
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