Running Redis Cluster on macos locally

redis-cluster-local

#!/bin/sh

# when installing redis from brew, it doesn't come with `utils` folder
# and because of which it's rather difficult to run redis cluster locally
# (`utils` folder has `create-cluster` script files, which automate the creation
# startup, stopping of redis cluster)

# this script is a workaround for that, basically, it checks if `utils` folder is
# there or not, if not, it downloads it and makes the necessary changes
# it assumes, you are running this on macos, with zsh shell

# check if redis-cli is installed
if redis-cli --version; then
	echo "Redis is already installed"
else
	brew install redis
fi

# check if redis distribution contains the util script file or not
stringVersion=$(redis-cli --version)
versionArray=($stringVersion)
version=${versionArray[1]}
echo version of redis "$version" 

echo check if utils directory was part of brew distribution 

dirPath="/usr/local/Cellar/redis/${version}/utils"
if [ -d "$dirPath" ]; then 
  echo utils script exist
else 
  echo "utils script doesn't exist"
  echo "downloading from utils from redis website" 

  wget https://download.redis.io/redis-stable.tar.gz -O redis-stable.tar.gz 
  tar -xzf redis-stable.tar.gz 
  cp -r redis-stable/utils /usr/local/Cellar/redis/${version}/ 
  rm redis-stable.tar.gz 
  rm -r redis-stable 
  sed -i '' 's|BIN_PATH="$SCRIPT_DIR/../../src/"|BIN_PATH="$SCRIPT_DIR/../../bin/"|' /usr/local/Cellar/redis/"${version}"/utils/create-cluster/create-cluster
fi 


echo testing by starting and stopping the cluster 
curDir=$(pwd) 
cd /usr/local/Cellar/redis/${version}/utils/create-cluster
./create-cluster create

if [ $? -eq 0 ]; then 
  echo "cluster created successfully"
  ./create-cluster start 
  redis-cli -c -p 30001 ping
  ./create-cluster stop
  echo "cluster created successfully"
  cd $curDir

  echo "update zshrc with create-cluster aliases"
  chmod +x /usr/local/Cellar/redis/${version}/utils/create-cluster/create-cluster
  if [ $SHELL == "/bin/zsh" ]; then
    echo "shell is zsh"
    if [ -f "$HOME"/.zshrc ]; then
      echo "zshrc already exists"
    else
      touch $HOME/.zshrc
    fi

    if grep -q "#### create-cluster-command ####" $HOME/.zshrc; then 
      echo "aliases already exist, overwriting"
      replacement="alias create-cluster=\"/usr/local/Cellar/redis/"${version}"/utils/create-cluster/create-cluster\""
      sed -i -z "s|\(#### create-cluster-command ####\n\).*\(\n#### end-create-cluster-commannd-alias ####\)|\1${replacement}\n\2|" $HOME/.zshrc
    else 
      echo "adding aliases to zshrc"
      echo "\n\n" >> $HOME/.zshrc
      echo "#### create-cluster-command ####" >> $HOME/.zshrc
      echo "alias create-cluster=/usr/local/Cellar/redis/${version}/utils/create-cluster/create-cluster" >> $HOME/.zshrc
      echo "#### end-create-cluster-commannd-alias ####" >> $HOME/.zshrc
    fi
  else 
    ehco "not a macos shell"
  fi

  echo "restart your shell to run create cluster commands"
  echo "To create a cluster run 'create-cluster create'"
  echo "To start a cluster run 'create-cluster start'"
  echo "To stop a cluster run 'create-cluster stop'"
  echo "please note, the above commands will create log files in the directory from which you run them"
  echo "Once the cluster is started, you can connect to it using 'redis-cli -c -p 30001'"

else
  echo "cluster creation failed"
  exit 1
fi