init

Dockerfile

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+FROM debian:12-slim
+
+ENV DEBIAN_FRONTEND=noninteractive
+ENV STEAMCMDDIR=/opt/steamcmd
+ENV VALHEIMDIR=/opt/valheim
+ENV BACKUPDIR=/backups
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        ca-certificates \
+        curl \
+        wget \
+        unzip \
+        tzdata \
+        lib32gcc-s1 \
+        lib32stdc++6 && \
+    rm -rf /var/lib/apt/lists/*
+
+# SteamCMD
+RUN mkdir -p ${STEAMCMDDIR} ${VALHEIMDIR} ${BACKUPDIR} && \
+    cd ${STEAMCMDDIR} && \
+    wget https://steamcdn-a.akamaihd.net/client/installer/steamcmd_linux.tar.gz && \
+    tar -xzf steamcmd_linux.tar.gz && rm steamcmd_linux.tar.gz
+
+# Copy scripts
+COPY entrypoint.sh /entrypoint.sh
+COPY backup.sh /backup.sh
+RUN chmod +x /entrypoint.sh /backup.sh
+
+WORKDIR ${VALHEIMDIR}
+
+EXPOSE 2456/udp 2457/udp 2458/udp
+
+VOLUME ["/config", "/backups"]
+
+ENTRYPOINT ["/entrypoint.sh"]

backup.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+WORLD_NAME="${WORLD_NAME:-Dedicated}"
+BACKUPDIR="${BACKUPDIR:-/backups}"
+
+ts=$(date +"%Y-%m-%d_%H-%M-%S")
+mkdir -p "${BACKUPDIR}"
+
+cp "/config/worlds_local/${WORLD_NAME}.db" "${BACKUPDIR}/${WORLD_NAME}_${ts}.db"
+cp "/config/worlds_local/${WORLD_NAME}.fwl" "${BACKUPDIR}/${WORLD_NAME}_${ts}.fwl"
+
+echo "Backup complete: ${BACKUPDIR}/${WORLD_NAME}_${ts}"

compose.yml

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+services:
+  valheim:
+    image: valheim-managed:latest
+    container_name: valheim
+    restart: unless-stopped
+    environment:
+      SERVER_NAME: "Minisip Valheim"
+      WORLD_NAME: "MinisipWorld"
+      SERVER_PASSWORD: "changeme"
+      PUBLIC: "1"
+      TZ: "America/Moncton"
+    volumes:
+      - /mnt/tank/valheim/config:/config
+      - /mnt/tank/valheim/backups:/backups
+    ports:
+      - "2456:2456/udp"
+      - "2457:2457/udp"
+      - "2458:2458/udp"

entrypoint.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+STEAMCMDDIR="${STEAMCMDDIR:-/opt/steamcmd}"
+VALHEIMDIR="${VALHEIMDIR:-/opt/valheim}"
+BACKUPDIR="${BACKUPDIR:-/backups}"
+BEPINEX_URL="${BEPINEX_URL:-https://thunderstore.io/package/download/BepInExPack_Valheim/latest.zip}"
+
+SERVER_NAME="${SERVER_NAME:-Valheim Server}"
+WORLD_NAME="${WORLD_NAME:-Dedicated}"
+SERVER_PASSWORD="${SERVER_PASSWORD:-changeme}"
+PUBLIC="${PUBLIC:-1}"
+
+install_valheim() {
+  echo "[valheim] installing/updating via SteamCMD..."
+  "${STEAMCMDDIR}/steamcmd.sh" +login anonymous \
+    +force_install_dir "${VALHEIMDIR}" \
+    +app_update 896660 validate \
+    +quit
+}
+
+install_bepinex() {
+  if [ -f "${VALHEIMDIR}/start_server_bepinex.sh" ]; then
+    echo "[bepinex] already installed."
+    return
+  fi
+
+  echo "[bepinex] downloading pack..."
+  curl -L "${BEPINEX_URL}" -o /tmp/bepinex.zip
+  unzip -q /tmp/bepinex.zip -d /tmp/bepinex
+  cp -r /tmp/bepinex/* "${VALHEIMDIR}/"
+  rm -rf /tmp/bepinex /tmp/bepinex.zip
+}
+
+backup_world() {
+  echo "[backup] backing up world..."
+  ts=$(date +"%Y-%m-%d_%H-%M-%S")
+  mkdir -p "${BACKUPDIR}"
+  cp "/config/worlds_local/${WORLD_NAME}.db" "${BACKUPDIR}/${WORLD_NAME}_${ts}.db"
+  cp "/config/worlds_local/${WORLD_NAME}.fwl" "${BACKUPDIR}/${WORLD_NAME}_${ts}.fwl"
+}
+
+# Install/update
+install_valheim
+install_bepinex
+
+# Background backup loop
+while true; do
+  sleep 3600
+  backup_world
+done &
+
+cd "${VALHEIMDIR}"
+
+echo "[valheim] starting server..."
+exec ./start_server_bepinex.sh \
+  -name "${SERVER_NAME}" \
+  -port 2456 \
+  -world "${WORLD_NAME}" \
+  -password "${SERVER_PASSWORD}" \
+  -public "${PUBLIC}"