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    Installing MineCraft Server on CentOS 7 with Oracle Java 8

    IT Discussion
    java minecraft linux linux server gaming scale scale hc3 centos centos 7 virtualization ntg lab
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    • scottalanmillerS
      scottalanmiller
      last edited by scottalanmiller

      Minecraft Server is a Java-based server for the MineCraft full client (as used on PCs.) In this "how to" we are going to get MineCraft set up to run as a service on CentOS 7.

      I started this project with a minimal CentOS 7 template on a Scale HC3 cluster. In addition to the basic install, only firewalld and sysstat were added to the basic image. The image was fully updated as of the time of this writing.

      0_1453139891184_mc.png

      Because Minecraft requires Java, and Java is not installed by default, we need to download that to our server. Minecraft wants Oracle Java rather than the OpenJDK that ships with CentOS so we need to acquire this software separately, which is unfortunate. In this guide we have used the very latest Java 8 release which seems to be working well.

      You will need to go to the Oracle Java SE Download Page and follow the link for the Server JRE. You will want the latest patch level, which at this time is 8u66. Look for the Linux x64 download link. You will need to accept the license agreement in order to download.

      0_1453132098885_javaforlinux.png

      Chances are you will not be downloading Java directly to your server since it requires interaction to accept the agreement. So we assume that you will download it elsewhere them copy it to the /top directory. Then, we can do as root...

      firewall-cmd --zone=public --add-port=25565/tcp --permanent
      firewall-cmd --reload
      mkdir /usr/java
      cp /tmp/server-jre-8u66-linux.x64.tar.gz /usr/java/
      cd /usr/java
      tar -xzvf *
      

      You can test your Java installation with this command:

      $ /usr/java/jdk1.8.0_66/bin/java -version
      java version "1.8.0_66"
      Java(TM) SE Runtime Environment (build 1.8.0_66-b17)
      Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode)
      

      The Minecraft server also needs to be downloaded. This we can do directly, however.

      mkdir /opt/minecraft
      cd /opt/minecraft
      yum -y install wget
      wget https://s3.amazonaws.com/Minecraft.Download/versions/1.8.9/minecraft_server.1.8.9.jar
      

      That's all that it takes for installation. Very simple. And now we can fire up the server:

      nohup /usr/java/jdk1.8.0_66/bin/java -Xmx1024M -Xms1024M -jar /opt/minecraft/minecraft_server.1.9.jar nogui &
      

      Of course you can pop this into your crontab with @reboot if you want to set it to start at boot time.

      At this point you should have a minimal running Minecraft server!

      If you want to add the ability to have the server start when the system reboots, then just add this line via crontab -e

      @reboot	cd /opt/minecraft; /usr/java/jdk1.8.0_66/bin/java -Xmx1024M -Xms1024M -jar ./minecraft_server.1.9.jar nogui
      

      0_1453388034637_awesome-minecraft-wallpapers-in-HD-1dut.com-6-1366x768.jpg

      1 Reply Last reply Reply Quote 6
      • coliverC
        coliver
        last edited by

        You can actually run Minecraft server with the OpenJDK project. I think it can be installed via the EPEL repo.

        scottalanmillerS 1 Reply Last reply Reply Quote 1
        • scottalanmillerS
          scottalanmiller @coliver
          last edited by

          @coliver said:

          You can actually run Minecraft server with the OpenJDK project. I think it can be installed via the EPEL repo.

          OpenJDK can be installed automatically, yes. Mojang recommends the Oracle Java platform for speed and stability, though.

          JaredBuschJ 1 Reply Last reply Reply Quote 0
          • JaredBuschJ
            JaredBusch @scottalanmiller
            last edited by

            @scottalanmiller said:

            @coliver said:

            You can actually run Minecraft server with the OpenJDK project. I think it can be installed via the EPEL repo.

            OpenJDK can be installed automatically, yes. Mojang recommends the Oracle Java platform for speed and stability, though.

            I have had a server running with a standard yum install java with no issues.

            A 1 Reply Last reply Reply Quote 1
            • A
              Alex Sage @JaredBusch
              last edited by

              @JaredBusch said:

              I have had a server running with a standard yum install java with no issues.

              Me too. @scottalanmiller did you remember to install and enable the firewall?

              scottalanmillerS 1 Reply Last reply Reply Quote 0
              • scottalanmillerS
                scottalanmiller @Alex Sage
                last edited by

                @anonymous said:

                @JaredBusch said:

                I have had a server running with a standard yum install java with no issues.

                Me too. @scottalanmiller did you remember to install and enable the firewall?

                Did you look at the install info?

                1 Reply Last reply Reply Quote 1
                • scottalanmillerS
                  scottalanmiller
                  last edited by

                  Added the ability to have it automatically start when the system reboots.

                  1 Reply Last reply Reply Quote 2
                  • scottalanmillerS
                    scottalanmiller
                    last edited by

                    Time to update to the latest version...

                    cd /opt/minecraft
                    wget https://s3.amazonaws.com/Minecraft.Download/versions/1.9/minecraft_server.1.9.jar
                    

                    And then we have to change how it starts up to make sure that it is grabbing the current JAR file.

                    I just use crontab for MineCraft to keep things simple. This is the only line that I need in the cron entries:

                    @reboot cd /opt/minecraft; /usr/java/jdk1.8.0_66/bin/java -Xmx1024M -Xms1024M -jar ./minecraft_server.1.9.jar nogui
                    
                    1 Reply Last reply Reply Quote 2
                    • scottalanmillerS
                      scottalanmiller
                      last edited by

                      Original post has been updated to reflect the latest 0.9 release of the Minecraft Server.

                      1 Reply Last reply Reply Quote 2
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