Merge pull request 'Propose a script to quickly spawn a cluster' (#14) from feature/cluster-example into master

Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/14

example/dev-cluster.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+set -e
+
+SCRIPT_FOLDER="`dirname \"$0\"`"
+REPO_FOLDER="${SCRIPT_FOLDER}/../"
+GARAGE_DEBUG="${REPO_FOLDER}/target/debug/"
+GARAGE_RELEASE="${REPO_FOLDER}/target/release/"
+PATH="${GARAGE_DEBUG}:${GARAGE_RELEASE}:$PATH"
+FANCYCOLORS=("41m" "42m" "44m" "45m" "100m" "104m")
+
+export RUST_BACKTRACE=1 
+export RUST_LOG=garage=info
+MAIN_LABEL="\e[${FANCYCOLORS[0]}[main]\e[49m"
+
+for count in $(seq 1 3); do
+CONF_PATH="/tmp/config.$count.toml"
+LABEL="\e[${FANCYCOLORS[$count]}[$count]\e[49m"
+
+cat > $CONF_PATH <<EOF
+block_size = 1048576			# objects are split in blocks of maximum this number of bytes
+metadata_dir = "/tmp/garage-meta-$count"
+data_dir = "/tmp/garage-data-$count"
+rpc_bind_addr = "127.0.0.$count:3901"		# the port other Garage nodes will use to talk to this node
+bootstrap_peers = [
+  "127.0.0.1:3901",
+	"127.0.0.2:3901",
+	"127.0.0.3:3901"
+]
+max_concurrent_rpc_requests = 12
+data_replication_factor = 3
+meta_replication_factor = 3
+meta_epidemic_fanout = 3
+
+[s3_api]
+api_bind_addr = "127.0.0.$count:3900"	# the S3 API port, HTTP without TLS. Add a reverse proxy for the TLS part.
+s3_region = "garage"				# set this to anything. S3 API calls will fail if they are not made against the region set here.
+
+[s3_web]
+web_bind_addr = "127.0.0.$count:3902"
+EOF
+
+echo -en "$LABEL configuration written to $CONF_PATH\n"
+
+(garage server -c /tmp/config.$count.toml 2>&1|while read r; do echo -en "$LABEL $r\n"; done) &
+done
+
+until garage status 2>&1|grep -q Healthy ; do 
+	echo -en "${MAIN_LABEL} cluster starting...\n"
+	sleep 1
+done
+echo -en "${MAIN_LABEL} cluster started\n"
+
+wait