mirror of
https://github.com/kikootwo/ReadMeABook.git
synced 2026-06-03 12:50:09 +00:00
Joe Harrison
7addb1dc70
Implements smart detection that allows users to provide external DATABASE_URL or REDIS_URL. When external services are detected, internal instances are automatically disabled to save resources. Maintains full backward compatibility with existing setup
74 lines
2.7 KiB
Bash
74 lines
2.7 KiB
Bash
#!/bin/bash
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# Redis startup wrapper for unified container
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# Smart supervisor: detects external Redis and sleeps instead of starting local instance
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#
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# Behavior:
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# - If REDIS_URL points to external host (not 127.0.0.1/localhost), sleep infinity
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# - Otherwise, start local Redis instance
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#
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# Uses gosu to ensure correct PUID:PGID for file operations
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#
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# Supports:
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# - Docker/LXC: Uses gosu to switch to PUID:PGID (default)
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# - Rootless Podman: Set ROOTLESS_CONTAINER=true to skip gosu
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set -e
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# Load environment from /etc/environment (set by entrypoint)
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if [ -f /etc/environment ]; then
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set -a
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source /etc/environment
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set +a
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fi
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echo "[Redis] Checking for external Redis configuration..."
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# Extract host from REDIS_URL
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# Format: redis://host:port or redis://:password@host:port
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if [ -n "$REDIS_URL" ]; then
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# Extract the host part (between :// or @, and :port or end)
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REDIS_HOST=$(echo "$REDIS_URL" | sed -n 's|redis://\([^:@]*@\)\?\([^:/]*\).*|\2|p')
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echo "[Redis] Detected REDIS_URL host: $REDIS_HOST"
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# Check if host is external (not localhost or 127.0.0.1)
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if [ "$REDIS_HOST" != "127.0.0.1" ] && [ "$REDIS_HOST" != "localhost" ]; then
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echo "[Redis] ✅ External Redis detected at $REDIS_HOST"
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echo "[Redis] Skipping local Redis startup - sleeping to keep supervisord happy"
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exec sleep infinity
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fi
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fi
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echo "[Redis] Starting local Redis server..."
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# Get PUID/PGID (default to redis user's current IDs if not set)
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PUID=${PUID:-$(id -u redis)}
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PGID=${PGID:-$(id -g redis)}
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echo "[Redis] Process will run as UID:GID = $PUID:$PGID"
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# =============================================================================
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# START REDIS WITH APPROPRIATE UID:GID HANDLING
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# =============================================================================
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# Two scenarios:
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# 1. Default: Running as root, use gosu to switch to PUID:PGID
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# 2. ROOTLESS_CONTAINER=true: Skip gosu (rootless Podman user namespace handles UID mapping)
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REDIS_CMD="/usr/bin/redis-server --appendonly yes --dir /var/lib/redis --bind 127.0.0.1 --port 6379"
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if [ "$(id -u)" = "0" ]; then
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if [ "${ROOTLESS_CONTAINER}" = "true" ]; then
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# Rootless Podman: Skip gosu - user namespace already maps UID 0 to host user
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echo "[Redis] ROOTLESS_CONTAINER=true - skipping gosu (user namespace handles UID mapping)"
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exec $REDIS_CMD
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else
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# Default: Use gosu to switch to the specified PUID:PGID
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echo "[Redis] Switching to UID:GID $PUID:$PGID via gosu..."
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exec gosu "$PUID:$PGID" $REDIS_CMD
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fi
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else
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# Not running as root - run directly (fallback for unusual configurations)
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echo "[Redis] Warning: Not running as root, cannot use gosu. Running as current user ($(id -u):$(id -g))."
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exec $REDIS_CMD
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fi
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