Can not get RCON to connect to server

[bobbyrabbit]

I'm new to docker and have managed to install a Creative and Survival server. I'm trying to RCON the Survival server, but connection is always refused.
I have enabled RCON in the server.properties file using port 25566 with rcon.port=25576
and RCON is starting successfully.

I am attempting to run this command from terminal to setup rcon-web:
docker run -d --name rcon-web -p 4326:4326 -p 4327:4327 -e RWA_PASSWORD=guipassword -e RWA_RCON_PASSWORD=minecraft -e RWA_RCON_PORT=25576 -e RWA_RCON_HOST=127.0.0.1 -e RWA_SERVER_NAME=mc2survival itzg/rcon

When checking the logs in portainer for rcon-web, I see:
2021-03-18T15:18:54.475Z RconServer [127.0.0.1:25576]: Connection failed

and error in the GUI of:
The current selected server is not available anymore. Maybe gone offline?

Can anybody help with this, I've spent a day on it! My Daughter needs op'ing and I'm getting it in the neck :-)
Thanks

[itzg]

Rather than docker runing them, it's use to use compose, such as

https://raw.githubusercontent.com/itzg/docker-rcon-web-admin/master/docker-compose.yml

however, a quick solution if you just want to run commands is exec'ing into the minecraft container such as

docker exec mc2survival rcon-cli op PLAYER_NAME

where I'm guessing mc2survival is the container name.

If you want to docker run the web app, add a network option to have that container re-use the network namespace of the minecraft container:

docker run -d --name rcon-web -p 4326:4326 -p 4327:4327 -e RWA_PASSWORD=guipassword -e RWA_RCON_PASSWORD=minecraft -e RWA_RCON_PORT=25576 -e RWA_RCON_HOST=127.0.0.1 -e RWA_SERVER_NAME=mc2survival --network container:mc2survival itzg/rcon

[bobbyrabbit]

Thanks for your reply. Really appreciated.
Yes mc2survival is the container name.

On trying:
docker exec mc2survival rcon-cli op PLAYER_NAME
I receive error: Failed to connect to RCON serverdial tcp: lookup mc2survival on 213.133.99.99:53: no such host

When adding the network option I receive error:
docker: Error response from daemon: conflicting options: port publishing and the container type network mode.

Thanks for your time.

[itzg]

Hmm, that's not the host nor class of IP address I expected there. How did you start your mc2survival container? If you don't have that handy, then output of docker inspect mc2survival might help.

Basically, this is how I typically do it

https://github.com/itzg/docker-minecraft-server#interacting-with-the-server

but something is different than I expect about your container.

[bobbyrabbit]

Thanks again.
Running a docker exec does return that rather odd IP address, which is related to where my Dedicated Server is hosted!

I originally setup the container like so:
docker run -d -it -p 25566:25566 --name mc2survival -e TZ=Europe/London -e TYPE=PAPER -e EULA=TRUE -e MODE=survival --restart=always -v /home/mc2survival/data:/data itzg/minecraft-server

Here is the result of docker inspect:

[
{
"Id": "d7f43c58b6b395c3cc19d2f3f80b18df8fd9538ff39f298b95c1e088c06fe48b",
"Created": "2021-03-18T14:55:52.134542957Z",
"Path": "/start",
"Args": [],
"State": {
"Status": "running",
"Running": true,
"Paused": false,
"Restarting": false,
"OOMKilled": false,
"Dead": false,
"Pid": 2418146,
"ExitCode": 0,
"Error": "",
"StartedAt": "2021-03-18T14:55:53.872947521Z",
"FinishedAt": "0001-01-01T00:00:00Z",
"Health": {
"Status": "healthy",
"FailingStreak": 0,
"Log": [
{
"Start": "2021-03-19T13:41:31.314982953Z",
"End": "2021-03-19T13:41:31.410764894Z",
"ExitCode": 0,
"Output": "localhost:25566 : version=Paper 1.16.5 online=0 max=20 motd='Survival Server'"
},
{
"Start": "2021-03-19T13:42:01.556013776Z",
"End": "2021-03-19T13:42:01.63767422Z",
"ExitCode": 0,
"Output": "localhost:25566 : version=Paper 1.16.5 online=0 max=20 motd='Survival Server'"
},
{
"Start": "2021-03-19T13:42:31.755632983Z",
"End": "2021-03-19T13:42:31.859157508Z",
"ExitCode": 0,
"Output": "localhost:25566 : version=Paper 1.16.5 online=0 max=20 motd='Survival Server'"
},
{
"Start": "2021-03-19T13:43:01.96383623Z",
"End": "2021-03-19T13:43:02.051708698Z",
"ExitCode": 0,
"Output": "localhost:25566 : version=Paper 1.16.5 online=0 max=20 motd='Survival Server'"
},
{
"Start": "2021-03-19T13:43:32.151827681Z",
"End": "2021-03-19T13:43:32.234714955Z",
"ExitCode": 0,
"Output": "localhost:25566 : version=Paper 1.16.5 online=0 max=20 motd='Survival Server'"
}
]
}
},
"Image": "sha256:96d6244fc4e4fbea95f93241c933cc315a23643aab33ceb635a533193641146c",
"ResolvConfPath": "/var/lib/docker/containers/d7f43c58b6b395c3cc19d2f3f80b18df8fd9538ff39f298b95c1e088c06fe48b/resolv.conf",
"HostnamePath": "/var/lib/docker/containers/d7f43c58b6b395c3cc19d2f3f80b18df8fd9538ff39f298b95c1e088c06fe48b/hostname",
"HostsPath": "/var/lib/docker/containers/d7f43c58b6b395c3cc19d2f3f80b18df8fd9538ff39f298b95c1e088c06fe48b/hosts",
"LogPath": "/var/lib/docker/containers/d7f43c58b6b395c3cc19d2f3f80b18df8fd9538ff39f298b95c1e088c06fe48b/d7f43c58b6b395c3cc19d2f3f80b18df8fd9538ff39f298b95c1e088c06fe48b-json.log",
"Name": "/mc2survival",
"RestartCount": 0,
"Driver": "overlay2",
"Platform": "linux",
"MountLabel": "",
"ProcessLabel": "",
"AppArmorProfile": "docker-default",
"ExecIDs": null,
"HostConfig": {
"Binds": [
"/home/mc2survival/data:/data"
],
"ContainerIDFile": "",
"LogConfig": {
"Type": "json-file",
"Config": {}
},
"NetworkMode": "bridge",
"PortBindings": {
"25566/tcp": [
{
"HostIp": "",
"HostPort": "25566"
}
]
},
"RestartPolicy": {
"Name": "always",
"MaximumRetryCount": 0
},
"AutoRemove": false,
"VolumeDriver": "",
"VolumesFrom": null,
"CapAdd": [
"AUDIT_WRITE",
"CHOWN",
"DAC_OVERRIDE",
"FOWNER",
"FSETID",
"KILL",
"MKNOD",
"NET_BIND_SERVICE",
"NET_RAW",
"SETFCAP",
"SETGID",
"SETPCAP",
"SETUID",
"SYS_CHROOT"
],
"CapDrop": [
"AUDIT_CONTROL",
"BLOCK_SUSPEND",
"DAC_READ_SEARCH",
"IPC_LOCK",
"IPC_OWNER",
"LEASE",
"LINUX_IMMUTABLE",
"MAC_ADMIN",
"MAC_OVERRIDE",
"NET_ADMIN",
"NET_BROADCAST",
"SYSLOG",
"SYS_ADMIN",
"SYS_BOOT",
"SYS_MODULE",
"SYS_NICE",
"SYS_PACCT",
"SYS_PTRACE",
"SYS_RAWIO",
"SYS_RESOURCE",
"SYS_TIME",
"SYS_TTY_CONFIG",
"WAKE_ALARM"
],
"CgroupnsMode": "host",
"Dns": [],
"DnsOptions": [],
"DnsSearch": [],
"ExtraHosts": [],
"GroupAdd": null,
"IpcMode": "private",
"Cgroup": "",
"Links": null,
"OomScoreAdj": 0,
"PidMode": "",
"Privileged": false,
"PublishAllPorts": false,
"ReadonlyRootfs": false,
"SecurityOpt": null,
"UTSMode": "",
"UsernsMode": "",
"ShmSize": 67108864,
"Runtime": "runc",
"ConsoleSize": [
0,
0
],
"Isolation": "",
"CpuShares": 0,
"Memory": 0,
"NanoCpus": 0,
"CgroupParent": "",
"BlkioWeight": 0,
"BlkioWeightDevice": [],
"BlkioDeviceReadBps": null,
"BlkioDeviceWriteBps": null,
"BlkioDeviceReadIOps": null,
"BlkioDeviceWriteIOps": null,
"CpuPeriod": 0,
"CpuQuota": 0,
"CpuRealtimePeriod": 0,
"CpuRealtimeRuntime": 0,
"CpusetCpus": "",
"CpusetMems": "",
"Devices": [],
"DeviceCgroupRules": null,
"DeviceRequests": null,
"KernelMemory": 0,
"KernelMemoryTCP": 0,
"MemoryReservation": 0,
"MemorySwap": 0,
"MemorySwappiness": null,
"OomKillDisable": false,
"PidsLimit": null,
"Ulimits": null,
"CpuCount": 0,
"CpuPercent": 0,
"IOMaximumIOps": 0,
"IOMaximumBandwidth": 0,
"MaskedPaths": [
"/proc/asound",
"/proc/acpi",
"/proc/kcore",
"/proc/keys",
"/proc/latency_stats",
"/proc/timer_list",
"/proc/timer_stats",
"/proc/sched_debug",
"/proc/scsi",
"/sys/firmware"
],
"ReadonlyPaths": [
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/sys",
"/proc/sysrq-trigger"
]
},
"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/3715cdf44dd5a4676e2e1c3f4cda847cef1c916676188c89d0cb5aff63b8d645-init/diff:/var/lib/docker/overlay2/ae2b55cea15b8b97816cf447a0e0e765595341a280f817161a7da39124094661/diff:/var/lib/docker/overlay2/549fdc0c6b0810239c4c31bb90ead3b81f7e8f3bfc580c33b8d182fb59c03150/diff:/var/lib/docker/overlay2/b6a90497ce2b6d66466f5f1776485c86cdc43b840abeb13f56bf47fa3eee7344/diff:/var/lib/docker/overlay2/3e20b5bfcabb5c790749c0c02ebfb5cc349403a14339ba0a868a0798c77f9d4a/diff:/var/lib/docker/overlay2/32f0502f3423f0eee3cc75134f077f6acfaba74f97ffc0eca6d280e5bb0549ee/diff:/var/lib/docker/overlay2/64bf6cf3aadae5330adb83b6000c9a1a9435d2c01e8aac40dce4b86e41b33089/diff:/var/lib/docker/overlay2/bc678de8af9004ed8411f908802aaadb0d82c9b908aafa10b804c2ab7f0d8438/diff:/var/lib/docker/overlay2/1090553959b5b686633331f1ea4c28a3f093b363710818e23aa94fe3bf0ae07c/diff:/var/lib/docker/overlay2/30e13d4eaf1311acacf0ab5f5658e26b14b44f639383c38dd7f18ef2bc925259/diff:/var/lib/docker/overlay2/17d4580035cbc2b9c9d6988fbf83a42b329e912fb95af3b905203c068190e28f/diff:/var/lib/docker/overlay2/dbece14d2e8ec9598d9c77ca00fa9628b70c658813b2f95d9c7142ccd818d310/diff:/var/lib/docker/overlay2/bdf6af3f84a93ed7938e92dd18017912e5c3d93e0d69d585b9e9b4b0584ab84d/diff:/var/lib/docker/overlay2/c565157a8b5452545b623e86921abfa614e2170e120dd6337fd83da54541c777/diff:/var/lib/docker/overlay2/80c772b508fd1502c0de1c67772fe18b23b693c8c5f0a2ba038ccb91223df81d/diff:/var/lib/docker/overlay2/2fc74024f02123b3a16488d717f27ad240aefea0d82aa9ae32792161e41f7bce/diff:/var/lib/docker/overlay2/16857b9bb9611d3c4d1c69e5d48f60d4e3025f113ae664482c4534b5d6a79628/diff:/var/lib/docker/overlay2/f38c69592f10e78d511d81de60058a09243321b69f6419ffb8b89e758388bedc/diff:/var/lib/docker/overlay2/e9be4942bfb9c48c2db4f85db2dc4220ebac6dfdeaa03b5fec6c3b31dedb9288/diff:/var/lib/docker/overlay2/ed0005c00811c5486aeab2b64ad415d577cbb1ed1112b4a7eeedbae2db78d9a1/diff:/var/lib/docker/overlay2/f0587541e603851750e20449cd7724a4f2275b4ce209ef44d17fb47e109cb377/diff:/var/lib/docker/overlay2/85100392bf97565985e75fd18e38e4538d71232fdca62687a73a3b28c6d53ef7/diff:/var/lib/docker/overlay2/0b2bcc55512d074bbc01898e3f326afa804199369c28bd912de111810695f941/diff:/var/lib/docker/overlay2/90fb7a35b6c34e01a69fbe6f96ba4ded2dd0a30f58c23c61bb20da6cc217a42e/diff",
"MergedDir": "/var/lib/docker/overlay2/3715cdf44dd5a4676e2e1c3f4cda847cef1c916676188c89d0cb5aff63b8d645/merged",
"UpperDir": "/var/lib/docker/overlay2/3715cdf44dd5a4676e2e1c3f4cda847cef1c916676188c89d0cb5aff63b8d645/diff",
"WorkDir": "/var/lib/docker/overlay2/3715cdf44dd5a4676e2e1c3f4cda847cef1c916676188c89d0cb5aff63b8d645/work"
},
"Name": "overlay2"
},
"Mounts": [
{
"Type": "bind",
"Source": "/home/mc2survival/data",
"Destination": "/data",
"Mode": "",
"RW": true,
"Propagation": "rprivate"
}
],
"Config": {
"Hostname": "ad38d19ed4cb",
"Domainname": "",
"User": "",
"AttachStdin": false,
"AttachStdout": false,
"AttachStderr": false,
"ExposedPorts": {
"25565/tcp": {},
"25566/tcp": {},
"25575/tcp": {}
},
"Tty": true,
"OpenStdin": true,
"StdinOnce": false,
"Env": [
"TZ=Europe/London",
"TYPE=PAPER",
"EULA=TRUE",
"MODE=survival",
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/lib/jvm/java-1.8-openjdk/jre/bin:/usr/lib/jvm/java-1.8-openjdk/bin",
"LANG=C.UTF-8",
"JAVA_HOME=/usr/lib/jvm/java-1.8-openjdk/jre",
"JAVA_VERSION=8u212",
"JAVA_ALPINE_VERSION=8.212.04-r0",
"UID=1000",
"GID=1000",
"JVM_XX_OPTS=-XX:+UseG1GC",
"MEMORY=1G",
"VERSION=LATEST",
"FORGEVERSION=RECOMMENDED",
"SPONGEBRANCH=STABLE",
"FABRICVERSION=LATEST",
"LEVEL=world",
"PVP=true",
"DIFFICULTY=easy",
"ENABLE_RCON=true",
"RCON_PORT=25576",
"RCON_PASSWORD=minecraft",
"LEVEL_TYPE=DEFAULT",
"SERVER_PORT=25566",
"ONLINE_MODE=TRUE",
"SERVER_NAME=Dedicated Server",
"ENABLE_AUTOPAUSE=false",
"AUTOPAUSE_TIMEOUT_EST=3600",
"AUTOPAUSE_TIMEOUT_KN=120",
"AUTOPAUSE_TIMEOUT_INIT=600",
"AUTOPAUSE_PERIOD=10",
"LANGUAGE=en_US:en",
"LC_ALL=en_US.UTF-8",
"AUTOPAUSE_KNOCK_INTERFACE=eth0",
"RCON_HOST=mc2survival"
],
"Cmd": null,
"Healthcheck": {
"Test": [
"CMD-SHELL",
"/health.sh"
],
"StartPeriod": 60000000000
},
"Image": "itzg/minecraft-server:latest",
"Volumes": {
"/data": {}
},
"WorkingDir": "/data",
"Entrypoint": [
"/start"
],
"OnBuild": null,
"Labels": {
"org.opencontainers.image.authors": "Geoff Bourne itzgeoff@gmail.com",
"org.opencontainers.image.created": "2020-12-16T02:42:23Z",
"org.opencontainers.image.documentation": "https://github.com/itzg/docker-minecraft-server",
"org.opencontainers.image.revision": "f613228619c6a3d2e4a3ad39c595f966cc1e7c31",
"org.opencontainers.image.source": "https://github.com/itzg/docker-minecraft-server",
"org.opencontainers.image.url": "https://github.com/itzg/docker-minecraft-server",
"org.opencontainers.image.version": "latest"
}
},
"NetworkSettings": {
"Bridge": "",
"SandboxID": "89129e211f5179fe3b5054b29c77d37e43e4e0c9f1d24223eb20e30e01ed05c5",
"HairpinMode": false,
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"Ports": {
"25565/tcp": null,
"25566/tcp": [
{
"HostIp": "0.0.0.0",
"HostPort": "25566"
}
],
"25575/tcp": null
},
"SandboxKey": "/var/run/docker/netns/89129e211f51",
"SecondaryIPAddresses": null,
"SecondaryIPv6Addresses": null,
"EndpointID": "206d5cb72a0dd89057327d5aed5c96d3d9155e64581c0d27c66bf4e31df1800b",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"MacAddress": "HIDDEN",
"Networks": {
"bridge": {
"IPAMConfig": {},
"Links": null,
"Aliases": null,
"NetworkID": "6cceb6b2ced20c6b7b662d25edff0247bf54efaec0b83548e53ed1f808e25f4b",
"EndpointID": "206d5cb72a0dd89057327d5aed5c96d3d9155e64581c0d27c66bf4e31df1800b",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "HIDDEN",
"DriverOpts": null
}
}
}
}
]

[itzg]

Actually, it looks like you must have included -e RCON_HOST=mc2survival in your container command-line. That really should be left as the default "localhost"...in fact I can't remember off hand why it's even configurable.

[bobbyrabbit]

I changed RCON_HOST to localhost and now I can RCON in. Thank you so much