Initial MC Scripts

CentOS/Minecraft/Minecraft-Open-Ports.bash

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+#!/bin/bash --posix
+
+
+### Minecraft Ports ###
+# Game ports    12000 - 12099
+# Query ports   12100 - 12199
+# RCON ports    12200 - 12299
+
+firewall-cmd --zone=public --add-port=12000-12299/tcp --permanent
+firewall-cmd --reload

CentOS/Minecraft/Minecraft-Start-Server.bash

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+#!/bin/bash
+
+### CONSTANTS ###
+
+#gigabytes
+MAX_RAM=8
+
+#gigabytes
+INITIAL_MEM=2
+
+
+log() {
+  # Print a message and send it to stdout or stderr depending upon log level, also configurable with debug etc.
+  #
+  # Arguments:
+  #   level <type: string> <position: 1> <required: true>
+  #     - The log level, defined within a case check in this function
+  #   message <type: string> <position: 2> <required: true>
+  #     - The info message
+  #   line_number <type: int> <position: 3> <required: false>
+  #     - The line number of the calling function (${LINNO})
+  #
+  # Usage:
+  #   log "info" "Could not find that directory"
+  #
+  # POSIX Compliant:
+  #   Yes
+  #
+
+  # Set debug status depending if a global debug variable has been set to either 1 or 0
+  local debug
+  if [ ${DEBUG} ]; then
+    debug=${DEBUG}
+  else
+    debug=0
+  fi
+
+  local FORMAT
+  FORMAT="[$(date +%Y-%m-%dT%H:%M:%S%z)]"
+
+  # Convert the level to uppercase
+  local level
+  level=$(echo "${1}" | tr '[:lower:]' '[:upper:]')
+
+  local message
+  message="${2}"
+
+  case "${level}" in
+    INFO)
+      # Output all info log levels to stdout
+      printf "${FORMAT}[INFO] %s\n" "${message}" >&1
+      return 0
+      ;;
+    DEBUG)
+      [[ ${debug} == 0 ]] && return 0
+      printf "${FORMAT}[DEBUG] %s\n" "${message}" >&1
+      return 0
+      ;;
+    ERROR)
+      # Output all error log levels to stderr
+      printf "${FORMAT}[ERROR] %s\n" "${message}" >&2
+      return 0
+      ;;
+    # Further log levels can be added by extending this switch statement with more comparisons
+
+    *) # Default case, no matches
+      # Returns non-zero code as an improper log option was passed, this helps with using `set -e`
+      log "ERROR" "Invalid log level passed, received level \"${level}\" with message \"${message}\""
+      return 1
+  esac
+}
+
+usage() {
+  # Print out usage instructions for the local script
+  #
+  # Arguments:
+  #   None
+  #
+  # Usage:
+  #   usage
+  #
+  # POSIX Compliant:
+  #   Yes
+  #
+  printf "Usage: %s%s\n" \
+  "$(basename ${0}) " \
+  "
+  -i \"this is some input\" -t \"this is some more example input\"
+  --input <string> | -i <string>
+    Example:
+      --input \"this is an example input\"
+  --test <string> | -t <string>
+    Example:
+      --test \"this is more example input\""
+}
+
+
+server_id=""
+minecraft_jar=""
+
+parse_args() {
+  # Parse input arguments
+  #
+  # Arguments:
+  #   Consult the `usage` function
+  #
+  # Usage:
+  #   parse_args "$@"
+  #     - All arguments should be ingested by parse_args first for variable setting
+  #
+  # POSIX Compliant:
+  #   Yes
+  #
+
+  while :; do
+    case ${1} in
+      -h | -\? | --help)
+        usage # Display a usage synopsis.
+        exit
+        ;;
+      --) # End of all options.
+        break
+        ;;
+      -s | --server)
+        shift
+        server_id="${1}"
+        ;;
+      -j | --jar)
+        shift
+        minecraft_jar="${1}"
+        ;;
+      -?*)
+        printf 'Unknown option: %s\n' "$1" >&2
+        usage
+        ;;
+      *) # Default case: No more options, so break out of the loop.
+        break ;;
+    esac
+    shift
+  done
+}
+
+parse_args "$@"
+
+# Check and see that the correct variables were set, some may not be expanded as if they're empty they're useless
+# anyhow
+[[ -z "${server_id}" ]] && log "error" "No server ID provided" && exit 1
+[[ "${server_id}" =~ [0-9] ]] || (log "error" "Server ID must be a number, received: ${server_id}" && exit 1)
+
+minecraft_directory=~/Minecraft/Server-"${server_id}"
+
+mkdir -p "${minecraft_directory}"
+cd "${minecraft_directory}" || (log "error" "Unable to change directory to ${minecraft_directory}" && exit 1)
+
+if [ ! -z "${minecraft_jar}" ]; then
+  [[ -d "${minecraft_jar}" ]] || (log "error" "Could not find a minecraft server jar at \"${minecraft_jar}\"" && exit 1)
+  minecraft_jar_name="$(basename ${minecraft_jar})"
+  mv "${minecraft_jar}" "${minecraft_directory}/server.jar"
+  java -jar "${minecraft_directory}/${minecraft_jar_name}"
+elif [ ! -d "${minecraft_directory}" ]; then
+  log "error" "The minecraft server \"${minecraft_directory}\" did not exist, to create it please pass the \"--jar\" flag..."
+  exit 1
+fi
+
+server_port=$(("12000" + "${server_id}"))
+query_port=$(("12100" + "${server_id}"))
+rcon_port=$(("12200" + "${server_id}"))
+
+
+## Set the correct ports
+sed -i "s/server-port=.+/server-port=${server_port}/g" server.properties \
+  && log "info" "Set the server port to ${server_port}"
+sed -i "s/query.port=.+/query.port=${query_port}/g" server.properties \
+
+sed -i "s/rcon.port=.+/rcon.port=${rcon_port}/g" server.properties
+
+## Turn RCON On
+# set the rcon password to the default
+log "info" "Setting the RCON password..."
+
+default_rcon_password=""
+[[ -z "${default_rcon_password}" ]] \
+  && log "error" "No RCON password has been defined within $(basename "${0}") -- exiting!" \
+    && exit 1
+
+sed -i "s/rcon.password=.+/rcon.password=${default_rcon_password}/g" server.properties \
+  && log "info" "RCON password set"
+
+

CentOS/Minecraft/README.md

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+Minecraft Server Uses Spigot