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docker-minecraft-server/minecraft-server/README.md
Jim Tremblay 074424a5bd Add section about new option ONLINE_MODE
2016-08-03 21:58:07 -04:00

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[![Docker Pulls](https://img.shields.io/docker/pulls/itzg/minecraft-server.svg)](https://hub.docker.com/r/itzg/minecraft-server/)
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This docker image provides a Minecraft Server that will automatically download the latest stable
version at startup. You can also run/upgrade to any specific version or the
latest snapshot. See the *Versions* section below for more information.
To simply use the latest stable version, run
docker run -d -p 25565:25565 --name mc itzg/minecraft-server
where the standard server port, 25565, will be exposed on your host machine.
If you want to serve up multiple Minecraft servers or just use an alternate port,
change the host-side port mapping such as
docker run -p 25566:25565 ...
will serve your Minecraft server on your host's port 25566 since the `-p` syntax is
`host-port`:`container-port`.
Speaking of multiple servers, it's handy to give your containers explicit names using `--name`, such as
docker run -d -p 25565:25565 --name mc itzg/minecraft-server
With that you can easily view the logs, stop, or re-start the container:
docker logs -f mc
( Ctrl-C to exit logs action )
docker stop mc
docker start mc
## Interacting with the server
In order to attach and interact with the Minecraft server, add `-it` when starting the container, such as
docker run -d -it -p 25565:25565 --name mc itzg/minecraft-server
With that you can attach and interact at any time using
docker attach mc
and then Control-p Control-q to **detach**.
For remote access, configure your Docker daemon to use a `tcp` socket (such as `-H tcp://0.0.0.0:2375`)
and attach from another machine:
docker -H $HOST:2375 attach mc
Unless you're on a home/private LAN, you should [enable TLS access](https://docs.docker.com/articles/https/).
## EULA Support
Mojang now requires accepting the [Minecraft EULA](https://account.mojang.com/documents/minecraft_eula). To accept add
-e EULA=TRUE
such as
docker run -d -it -e EULA=TRUE -p 25565:25565 --name mc itzg/minecraft-server
## Attaching data directory to host filesystem
In order to readily access the Minecraft data, use the `-v` argument
to map a directory on your host machine to the container's `/data` directory, such as:
docker run -d -v /path/on/host:/data ...
When attached in this way you can stop the server, edit the configuration under your attached `/path/on/host`
and start the server again with `docker start CONTAINERID` to pick up the new configuration.
**NOTE**: By default, the files in the attached directory will be owned by the host user with UID of 1000 and host group with GID of 1000.
You can use an different UID and GID by passing the options:
-e UID=1000 -e GID=1000
replacing 1000 with a UID and GID that is present on the host.
Here is one way to find the UID and GID:
id some_host_user
getent group some_host_group
## Versions
To use a different Minecraft version, pass the `VERSION` environment variable, which can have the value
* LATEST
* SNAPSHOT
* (or a specific version, such as "1.7.9")
For example, to use the latest snapshot:
docker run -d -e VERSION=SNAPSHOT ...
or a specific version:
docker run -d -e VERSION=1.7.9 ...
## Running a Forge Server
Enable Forge server mode by adding a `-e TYPE=FORGE` to your command-line.
By default the container will run the `RECOMMENDED` version of [Forge server](http://www.minecraftforge.net/wiki/)
but you can also choose to run a specific version with `-e FORGEVERSION=10.13.4.1448`.
$ docker run -d -v /path/on/host:/data -e VERSION=1.7.10 \
-e TYPE=FORGE -e FORGEVERSION=10.13.4.1448 \
-p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server
In order to add mods, you have two options.
### Using the /data volume
This is the easiest way if you are using a persistent `/data` mount.
To do this, you will need to attach the container's `/data` directory
(see "Attaching data directory to host filesystem”).
Then, you can add mods to the `/path/on/host/mods` folder you chose. From the example above,
the `/path/on/host` folder contents look like:
```
/path/on/host
├── mods
│   └── ... INSTALL MODS HERE ...
├── config
│   └── ... CONFIGURE MODS HERE ...
├── ops.json
├── server.properties
├── whitelist.json
└── ...
```
If you add mods while the container is running, you'll need to restart it to pick those
up:
docker stop mc
docker start mc
### Using separate mounts
This is the easiest way if you are using an ephemeral `/data` filesystem,
or downloading a world with the `WORLD` option.
There are two additional volumes that can be mounted; `/mods` and `/config`.
Any files in either of these filesystems will be copied over to the main
`/data` filesystem before starting Minecraft.
This works well if you want to have a common set of modules in a separate
location, but still have multiple worlds with different server requirements
in either persistent volumes or a downloadable archive.
## Running a Bukkit/Spigot server
Enable Bukkit/Spigot server mode by adding a `-e TYPE=BUKKIT -e VERSION=1.8` or `-e TYPE=SPIGOT -e VERSION=1.8` to your command-line.
docker run -d -v /path/on/host:/data \
-e TYPE=SPIGOT -e VERSION=1.8 \
-p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server
You can build spigot from source by adding `-e BUILD_FROM_SOURCE=true`
__NOTE: to avoid pegging the CPU when running Spigot,__ you will need to
pass `--noconsole` at the very end of the command line and not use `-it`. For example,
docker run -d -v /path/on/host:/data \
-e TYPE=SPIGOT -e VERSION=1.8 \
-p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server --noconsole
You can install Bukkit plugins in two ways...
### Using the /data volume
This is the easiest way if you are using a persistent `/data` mount.
To do this, you will need to attach the container's `/data` directory
(see "Attaching data directory to host filesystem”).
Then, you can add plugins to the `/path/on/host/plugins` folder you chose. From the example above,
the `/path/on/host` folder contents look like:
```
/path/on/host
├── plugins
│   └── ... INSTALL PLUGINS HERE ...
├── ops.json
├── server.properties
├── whitelist.json
└── ...
```
If you add plugins while the container is running, you'll need to restart it to pick those
up:
docker stop mc
docker start mc
### Using separate mounts
This is the easiest way if you are using an ephemeral `/data` filesystem,
or downloading a world with the `WORLD` option.
There is one additional volume that can be mounted; `/plugins`.
Any files in this filesystem will be copied over to the main
`/data/plugins` filesystem before starting Minecraft.
This works well if you want to have a common set of plugins in a separate
location, but still have multiple worlds with different server requirements
in either persistent volumes or a downloadable archive.
## Running a PaperSpigot server
Enable PaperSpigot server mode by adding a `-e TYPE=PAPER -e VERSION=1.9.4` to your command-line.
docker run -d -v /path/on/host:/data \
-e TYPE=PAPER -e VERSION=1.9.4 \
-p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server
__NOTE: to avoid pegging the CPU when running PaperSpigot,__ you will need to
pass `--noconsole` at the very end of the command line and not use `-it`. For example,
docker run -d -v /path/on/host:/data \
-e TYPE=PAPER -e VERSION=1.9.4 \
-p 25565:25565 -e EULA=TRUE --name mc itzg/minecraft-server --noconsole
You can install Bukkit plugins in two ways...
### Using the /data volume
This is the easiest way if you are using a persistent `/data` mount.
To do this, you will need to attach the container's `/data` directory
(see "Attaching data directory to host filesystem”).
Then, you can add plugins to the `/path/on/host/plugins` folder you chose. From the example above,
the `/path/on/host` folder contents look like:
```
/path/on/host
├── plugins
│   └── ... INSTALL PLUGINS HERE ...
├── ops.json
├── server.properties
├── whitelist.json
└── ...
```
If you add plugins while the container is running, you'll need to restart it to pick those
up:
docker stop mc
docker start mc
### Using separate mounts
This is the easiest way if you are using an ephemeral `/data` filesystem,
or downloading a world with the `WORLD` option.
There is one additional volume that can be mounted; `/plugins`.
Any files in this filesystem will be copied over to the main
`/data/plugins` filesystem before starting Minecraft.
This works well if you want to have a common set of plugins in a separate
location, but still have multiple worlds with different server requirements
in either persistent volumes or a downloadable archive.
## Using Docker Compose
Rather than type the server options below, the port mappings above, etc
every time you want to create new Minecraft server, you can now use
[Docker Compose](https://docs.docker.com/compose/). Start with a
`docker-compose.yml` file like the following:
```
minecraft-server:
ports:
- "25565:25565"
environment:
EULA: TRUE
image: itzg/minecraft-server
container_name: mc
tty: true
stdin_open: true
restart: always
```
and in the same directory as that file run
docker-compose -d up
Now, go play...or adjust the `environment` section to configure
this server instance.
## Server configuration
### Difficulty
The difficulty level (default: `easy`) can be set like:
docker run -d -e DIFFICULTY=hard ...
Valid values are: `peaceful`, `easy`, `normal`, and `hard`, and an
error message will be output in the logs if it's not one of these
values.
### Whitelist Players
To whitelist players for your Minecraft server, pass the Minecraft usernames separated by commas via the `WHITELIST` environment variable, such as
docker run -d -e WHITELIST=user1,user2 ...
If the `WHITELIST` environment variable is not used, any user can join your Minecraft server if it's publicly accessible.
### Op/Administrator Players
To add more "op" (aka adminstrator) users to your Minecraft server, pass the Minecraft usernames separated by commas via the `OPS` environment variable, such as
docker run -d -e OPS=user1,user2 ...
### Server icon
A server icon can be configured using the `ICON` variable. The image will be automatically
downloaded, scaled, and converted from any other image format:
docker run -d -e ICON=http://..../some/image.png ...
### Rcon
To use rcon use the `ENABLE_RCON` and `RCON_PASSORD` variables.
By default rcon port will be `25575` but can easily be changed with the `RCON_PORT` variable.
docker run -d -e ENABLE_RCON=true -e RCON_PASSWORD=testing
### Query
Enabling this will enable the gamespy query protocol.
By default the query port will be `25565` (UDP) but can easily be changed with the `QUERY_PORT` variable.
docker run -d -e ENABLE_QUERY=true
### Max players
By default max players is 20, you can increase this with the `MAX_PLAYERS` variable.
docker run -d -e MAX_PLAYERS=50
### Max world size
This sets the maximum possible size in blocks, expressed as a radius, that the world border can obtain.
docker run -d -e MAX_WORLD_SIZE=10000
### Allow Nether
Allows players to travel to the Nether.
docker run -d -e ALLOW_NETHER=true
### Announce Player Achievements
Allows server to announce when a player gets an achievement.
docker run -d -e ANNOUNCE_PLAYER_ACHIEVEMENTS=true
### Enable Command Block
Enables command blocks
docker run -d -e ENABLE_COMMAND_BLOCK=true
### Force Gamemode
Force players to join in the default game mode.
- false - Players will join in the gamemode they left in.
- true - Players will always join in the default gamemode.
docker run -d -e FORCE_GAMEMODE=false
### Generate Structures
Defines whether structures (such as villages) will be generated.
- false - Structures will not be generated in new chunks.
- true - Structures will be generated in new chunks.
docker run -d -e GENERATE_STRUCTURES=true
### Hardcore
If set to true, players will be set to spectator mode if they die.
docker run -d -e HARDCORE=false
### Max Build Height
The maximum height in which building is allowed.
Terrain may still naturally generate above a low height limit.
docker run -d -e MAX_BUILD_HEIGHT=256
### Max Tick Time
The maximum number of milliseconds a single tick may take before the server watchdog stops the server with the message, A single server tick took 60.00 seconds (should be max 0.05); Considering it to be crashed, server will forcibly shutdown. Once this criteria is met, it calls System.exit(1).
Setting this to -1 will disable watchdog entirely
docker run -d -e MAX_TICK_TIME=60000
### Spawn Animals
Determines if animals will be able to spawn.
docker run -d -e SPAWN_ANIMALS=true
### Spawn Monsters
Determines if monsters will be spawned.
docker run -d -e SPAWN_MONSTERS=true
### Spawn NPCs
Determines if villagers will be spawned.
docker run -d -e SPAWN_NPCS=true
### View Distance
Sets the amount of world data the server sends the client, measured in chunks in each direction of the player (radius, not diameter).
It determines the server-side viewing distance.
docker run -d -e VIEW_DISTANCE=10
### Level Seed
If you want to create the Minecraft level with a specific seed, use `SEED`, such as
docker run -d -e SEED=1785852800490497919 ...
### Game Mode
By default, Minecraft servers are configured to run in Survival mode. You can
change the mode using `MODE` where you can either provide the [standard
numerical values](http://minecraft.gamepedia.com/Game_mode#Game_modes) or the
shortcut values:
* creative
* survival
* adventure
* spectator (only for Minecraft 1.8 or later)
For example:
docker run -d -e MODE=creative ...
### Message of the Day
The message of the day, shown below each server entry in the UI, can be changed with the `MOTD` environment variable, such as
docker run -d -e 'MOTD=My Server' ...
If you leave it off, the last used or default message will be used. _The example shows how to specify a server
message of the day that contains spaces by putting quotes around the whole thing._
### PVP Mode
By default, servers are created with player-vs-player (PVP) mode enabled. You can disable this with the `PVP`
environment variable set to `false`, such as
docker run -d -e PVP=false ...
### Level Type and Generator Settings
By default, a standard world is generated with hills, valleys, water, etc. A different level type can
be configured by setting `LEVEL_TYPE` to
* DEFAULT
* FLAT
* LARGEBIOMES
* AMPLIFIED
* CUSTOMIZED
Descriptions are available at the [gamepedia](http://minecraft.gamepedia.com/Server.properties).
When using a level type of `FLAT` and `CUSTOMIZED`, you can further configure the world generator
by passing [custom generator settings](http://minecraft.gamepedia.com/Superflat).
**Since generator settings usually have ;'s in them, surround the -e value with a single quote, like below.**
For example (just the `-e` bits):
-e LEVEL_TYPE=flat -e 'GENERATOR_SETTINGS=3;minecraft:bedrock,3*minecraft:stone,52*minecraft:sandstone;2;'
### World Save Name
You can either switch between world saves or run multiple containers with different saves by using the `LEVEL` option,
where the default is "world":
docker run -d -e LEVEL=bonus ...
**NOTE:** if running multiple containers be sure to either specify a different `-v` host directory for each
`LEVEL` in use or don't use `-v` and the container's filesystem will keep things encapsulated.
### Downloadable world
Instead of mounting the `/data` volume, you can instead specify the URL of
a ZIP file containing an archived world. This will be downloaded, and
unpacked in the `/data` directory; if it does not contain a subdirectory
called `world/` then it will be searched for a file `level.dat` and the
containing subdirectory renamed to `world`. This means that most of the
archived Minecraft worlds downloadable from the Internet will already be in
the correct format.
The ZIP file may also contain a `server.properties` file and `modules`
directory, if required.
docker run -d -e WORLD=http://www.example.com/worlds/MySave.zip ...
**NOTE:** Unless you also mount `/data` as an external volume, this world
will be deleted when the container is deleted.
**NOTE:** This URL must be accessible from inside the container. Therefore,
you should use an IP address or a globally resolveable FQDN, or else the
name of a linked container.
### Downloadable mod/plugin pack for Forge, Bukkit, and Spigot Servers
Like the `WORLD` option above, you can specify the URL of a "mod pack"
to download and install into `mods` for Forge or `plugins` for Bukkit/Spigot.
To use this option pass the environment variable `MODPACK`, such as
docker run -d -e MODPACK=http://www.example.com/mods/modpack.zip ...
**NOTE:** The referenced URL must be a zip file with one or more jar files at the
top level of the zip archive. Make sure the jars are compatible with the
particular `TYPE` of server you are running.
### Online mode
By default, server checks connecting players against Minecraft's account database. If you want to create an offline server or your server is not connected to the internet, you can disable the server to try connecting to minecraft.net to authenticate players with environment variable `ONLINE_MODE`, like this
docker run -d -e ONLINE_MODE=FALSE ...
## JVM Configuration
### Memory Limit
The Java memory limit can be adjusted using the `JVM_OPTS` environment variable, where the default is
the setting shown in the example (max and min at 1024 MB):
docker run -e 'JVM_OPTS=-Xmx1024M -Xms1024M' ...
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