mirror of https://github.com/hashicorp/consul
Michele Degges
3 years ago
committed by
GitHub
3 changed files with 194 additions and 0 deletions
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#!/usr/bin/dumb-init /bin/sh |
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set -e |
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# Note above that we run dumb-init as PID 1 in order to reap zombie processes |
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# as well as forward signals to all processes in its session. Normally, sh |
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# wouldn't do either of these functions so we'd leak zombies as well as do |
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# unclean termination of all our sub-processes. |
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# As of docker 1.13, using docker run --init achieves the same outcome. |
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# You can set CONSUL_BIND_INTERFACE to the name of the interface you'd like to |
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# bind to and this will look up the IP and pass the proper -bind= option along |
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# to Consul. |
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CONSUL_BIND= |
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if [ -n "$CONSUL_BIND_INTERFACE" ]; then |
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CONSUL_BIND_ADDRESS=$(ip -o -4 addr list $CONSUL_BIND_INTERFACE | head -n1 | awk '{print $4}' | cut -d/ -f1) |
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if [ -z "$CONSUL_BIND_ADDRESS" ]; then |
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echo "Could not find IP for interface '$CONSUL_BIND_INTERFACE', exiting" |
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exit 1 |
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fi |
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CONSUL_BIND="-bind=$CONSUL_BIND_ADDRESS" |
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echo "==> Found address '$CONSUL_BIND_ADDRESS' for interface '$CONSUL_BIND_INTERFACE', setting bind option..." |
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fi |
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# You can set CONSUL_CLIENT_INTERFACE to the name of the interface you'd like to |
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# bind client intefaces (HTTP, DNS, and RPC) to and this will look up the IP and |
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# pass the proper -client= option along to Consul. |
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CONSUL_CLIENT= |
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if [ -n "$CONSUL_CLIENT_INTERFACE" ]; then |
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CONSUL_CLIENT_ADDRESS=$(ip -o -4 addr list $CONSUL_CLIENT_INTERFACE | head -n1 | awk '{print $4}' | cut -d/ -f1) |
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if [ -z "$CONSUL_CLIENT_ADDRESS" ]; then |
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echo "Could not find IP for interface '$CONSUL_CLIENT_INTERFACE', exiting" |
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exit 1 |
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fi |
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CONSUL_CLIENT="-client=$CONSUL_CLIENT_ADDRESS" |
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echo "==> Found address '$CONSUL_CLIENT_ADDRESS' for interface '$CONSUL_CLIENT_INTERFACE', setting client option..." |
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fi |
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# CONSUL_DATA_DIR is exposed as a volume for possible persistent storage. The |
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# CONSUL_CONFIG_DIR isn't exposed as a volume but you can compose additional |
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# config files in there if you use this image as a base, or use CONSUL_LOCAL_CONFIG |
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# below. |
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CONSUL_DATA_DIR=/consul/data |
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CONSUL_CONFIG_DIR=/consul/config |
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# You can also set the CONSUL_LOCAL_CONFIG environemnt variable to pass some |
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# Consul configuration JSON without having to bind any volumes. |
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if [ -n "$CONSUL_LOCAL_CONFIG" ]; then |
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echo "$CONSUL_LOCAL_CONFIG" > "$CONSUL_CONFIG_DIR/local.json" |
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fi |
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# If the user is trying to run Consul directly with some arguments, then |
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# pass them to Consul. |
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if [ "${1:0:1}" = '-' ]; then |
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set -- consul "$@" |
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fi |
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# Look for Consul subcommands. |
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if [ "$1" = 'agent' ]; then |
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shift |
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set -- consul agent \ |
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-data-dir="$CONSUL_DATA_DIR" \ |
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-config-dir="$CONSUL_CONFIG_DIR" \ |
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$CONSUL_BIND \ |
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$CONSUL_CLIENT \ |
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"$@" |
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elif [ "$1" = 'version' ]; then |
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# This needs a special case because there's no help output. |
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set -- consul "$@" |
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elif consul --help "$1" 2>&1 | grep -q "consul $1"; then |
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# We can't use the return code to check for the existence of a subcommand, so |
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# we have to use grep to look for a pattern in the help output. |
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set -- consul "$@" |
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fi |
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# NOTE: Unlike in the regular Consul Docker image, we don't have code here |
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# for changing data-dir directory ownership or using su-exec because OpenShift |
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# won't run this container as root and so we can't change data dir ownership, |
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# and there's no need to use su-exec. |
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exec "$@" |
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