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COMP512 P3

Create these files yourself:

zkEnsemble.sh

  • Edit content to your current configuration. All other sh files depend on it.
  • To be put in the root directory.
  • Ignored by git for portability
#!/bin/bash

# (Local) Zookeeper binary folder and environment
if [[ -z "$ZOOBINDIR" ]]
then
    export ZOOBINDIR=~/Desktop/apache-zookeeper-3.6.2-bin/bin # [CHANGE THIS]
    . "$ZOOBINDIR"/zkEnv.sh
fi

# Hostnames of the ZK ensemble nodes
# [remove node1/2 if running standalone ZK at home]
node1="lab2-XX"
node2="lab2-YY"
node3="lab2-ZZ"

# Addresses of the ZK ensemble nodes
# [remove node1/2 if running standalone ZK at home]
node1Address="$node1.cs.mcgill.ca"
node2Address="$node2.cs.mcgill.ca"
node3Address="$node3.cs.mcgill.ca"

# Ports of the ZK ensemble nodes
# [remove node1/2 if running standalone ZK at home]
node1Port="21850"
node2Port="21850"
node3Port="21850"

# [remove node1/2-related if running standalone ZK at home]
export nodesList="$node1,$node2,$node3"
export ZKSERVER="$node1Address:$node1Port,$node2Address:$node2Port,$node3Address:$node3Port"

# Unset this to remove prints relating to watcher loops.
export LOOP_PRINT_50="true"

Scripts

Unless otherwise noted, all scripts can be run from anywhere and depend on zkEnsemble.sh being setup correctly to function.

command description
clean.sh Remove all binaries. Doesn't depend on zkEnsemble.sh
compileAll.sh Compiles Task, Client, Server and Util.
resetZK.sh (Run this before launching any servers) Launches a helper program that will attempt to reset the ZK configuration to the initial state.
runServer.sh Starts a server that will connect to the configuration in zkEnsemble.sh
runClient.sh runClient.sh <task_magnitude> <launcher> Start a client that will connect to the configuration in zkEnsemble.sh.<launcher> is optional, it allows using a custom client launcher.
startZK.sh Start the ZK node on this computer. Only call this if relevant. ZK folder and conf must be setup correctly
stopZK.sh Stops the ZK node on this computer. Only call this if relevant. ZK folder and conf must be setup correctly
zkCli.sh Opens a terminal to the CLI of the ZK ensemble specified in zkEnsemble.sh

Technicalities

Scripts were made to work on linux and windows (CYGWIN/MINGW64). I'm not a mac user so idk what's going wrong, but they don't work on Yiwei's mac for whatever reason. If you're on Windows and use Git Bash, you have to run git bash in MINGW64 mode and NOT the default SYSE2 mode (launch bash from %PROGRAMFILES%/Git/bin/bash.exe instead of the usual %PROGRAMFILES%/Git/usr/bin/bash.exe). IJ already launches bash in MINGW64 mode, but the "Open in Git Bash" context menu and Windows Terminal launch in SYSE2 by default.

Setting up a standalone ZK ensemble locally for testing

On the host (single) computer, follow the instructions on page 1 and 2 of the setup pdf BUT:

Step 3. Only create one data folder, with host name as folder name ($(hostname)).
Step 5. Only change clientPort=21850 and dataDir=./data.
Step 6. Unnecessary

For start and shutdown, just use the helper scripts (given that zkEnsemble.sh is set up correctly).