mirror of
https://github.com/jokob-sk/NetAlertX.git
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73 lines
4.1 KiB
Bash
Executable File
73 lines
4.1 KiB
Bash
Executable File
#!/bin/sh
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# check-ports.sh detects and warns if required ports are already in use
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# or if they are configured to be the same.
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# Intended for lightweight Alpine containers (uses busybox netstat).
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# Define ports from ENV variables, applying defaults
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PORT_APP=${PORT:-20211}
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# Prefer explicit GRAPHQL_PORT, fall back to parsed override if present.
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if [ -n "${APP_CONF_OVERRIDE:-}" ]; then
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# crude parse: look for GRAPHQL_PORT in JSON-like string
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PORT_GQL=$(printf '%s' "${APP_CONF_OVERRIDE}" | grep -o 'GRAPHQL_PORT"*[:=]\"*[0-9]\+' | tr -cd '0-9' || true)
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fi
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PORT_GQL=${PORT_GQL:-${GRAPHQL_PORT:-20212}}
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# Check if ports are configured to be the same
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if [ "${PORT_APP}" -eq "${PORT_GQL}" ]; then
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cat <<EOF
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══════════════════════════════════════════════════════════════════════════════
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⚠️ Configuration Warning: Both ports are set to ${PORT_APP}.
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The Application port (\$PORT) and the GraphQL API port (\$GRAPHQL_PORT)
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are configured to use the same port. This will cause a conflict.
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https://docs.netalertx.com/docker-troubleshooting/port-conflicts
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══════════════════════════════════════════════════════════════════════════════
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EOF
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fi
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# Check for netstat (usually provided by busybox)
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if ! command -v netstat >/dev/null 2>&1; then
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cat <<EOF
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══════════════════════════════════════════════════════════════════════════════
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⚠️ Configuration Error: 'netstat' command not found.
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Cannot check port availability. Please ensure 'net-tools'
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or the busybox 'netstat' applet is available in this container.
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══════════════════════════════════════════════════════════════════════════════
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EOF
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exit 0 # Exit gracefully, this is a non-fatal check
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fi
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# Fetch all listening TCP/UDP ports once.
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# We awk $4 to get the 'Local Address' column (e.g., 0.0.0.0:20211 or :::20211)
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LISTENING_PORTS=$(netstat -lntu | awk '{print $4}')
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# Check Application Port
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# We grep for ':{PORT}$' to match the port at the end of the string.
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if echo "$LISTENING_PORTS" | grep -q ":${PORT_APP}$"; then
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cat <<EOF
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══════════════════════════════════════════════════════════════════════════════
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⚠️ Port Warning: Application port ${PORT_APP} is already in use.
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The main application (defined by \$PORT) may fail to start.
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https://docs.netalertx.com/docker-troubleshooting/port-conflicts
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══════════════════════════════════════════════════════════════════════════════
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EOF
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fi
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# Check GraphQL Port (always emit if listening, even if same port)
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if echo "$LISTENING_PORTS" | grep -q ":${PORT_GQL}$"; then
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cat <<EOF
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══════════════════════════════════════════════════════════════════════════════
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⚠️ Port Warning: GraphQL API port ${PORT_GQL} is already in use.
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The GraphQL API (defined by \$APP_CONF_OVERRIDE or \$GRAPHQL_PORT)
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may fail to start.
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https://docs.netalertx.com/docker-troubleshooting/port-conflicts
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══════════════════════════════════════════════════════════════════════════════
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EOF
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fi |