Initial cluster script.

src/scripts/cluster.sh

@@ -0,0 +1,79 @@
+#!/bin/bash
+globalprefix="hpdevkit"
+imgname="evernodedev/hotpocket:latest-ubt.20.04-njs.16"
+volmount="/devkitvol"
+
+command=$1
+cluster=$2
+volume="${globalprefix}_${cluster}_vol"
+network="${globalprefix}_${cluster}_net"
+containerprefix="${globalprefix}_${cluster}_con"
+nodecount=0
+
+echo "Hot Pocket development toolkit"
+
+if [ "$command" = "create" ] || [ "$command" = "destroy" ] ; then
+    echo "command: $command"
+else
+    echo "Invalid command."
+    echo "Expected: create | destroy"
+    exit 1
+fi
+
+[ -z $cluster ] && echo "Cluster name not specified." && exit 1
+
+function parsenodecountarg() {
+    ! [ "$1" -eq "$1" ] 2> /dev/null && echo "Node count must be a number." && return 1
+    [ $1 -le 0 ] && echo "Node count must be 1 or higher." && return 1
+    nodecount=$1
+}
+
+function exists() {
+    local output=$(docker $1 ls | grep $2)
+    if [ -z "$output" ] ; then
+        return 1
+    else
+        return 0
+    fi
+}
+
+function clusterexists() {
+    if exists "volume" $volume || exists "network" $network || exists "container" $containerprefix ; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+function createcluster() {
+    clusterexists && echo "Cluster '$cluster' already exists." && exit 1
+    docker volume create $volume
+    docker network create $network
+
+    for ((i=1; i<=$nodecount; i++)); 
+    do
+        local containername="${containerprefix}_$i"
+        docker container create --name $containername --privileged --mount type=volume,src=$volume,dst=$volmount $imgname
+    done
+}
+
+function destroycluster() {
+    ! clusterexists && echo "Cluster '$cluster' does not exist." && exit 1
+
+    local containercount=$(docker ps -a | grep $containerprefix | wc -l)
+    for ((i=1; i<=$containercount; i++)); 
+    do
+        local containername="${containerprefix}_$i"
+        docker container rm $containername
+    done
+
+    exists "volume" $volume && docker volume rm $volume
+    exists "network" $network && docker network rm $network
+}
+
+if [ $command = "create" ]; then
+    ! parsenodecountarg $3 && echo "Usage: create <cluster name> <node count>" && exit 1
+    createcluster
+elif [ $command = "destroy" ]; then
+    destroycluster
+fi