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https://github.com/jokob-sk/NetAlertX.git
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69 lines
4.0 KiB
Bash
Executable File
69 lines
4.0 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=${PORT:-20211}
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# PORT_GQL=${APP_CONF_OVERRIDE:-${GRAPHQL_PORT:-20212}}
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# # Check if ports are configured to be the same
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# if [ "$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
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# (\$APP_CONF_OVERRIDE or \$GRAPHQL_PORT) are configured to use the
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# same port. This will cause a conflict.
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# https://github.com/jokob-sk/NetAlertX/blob/main/docs/docker-troubleshooting/port-conflicts.md
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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 ${PORT_APP} is already in use.
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The main application (defined by \$PORT) may fail to start.
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https://github.com/jokob-sk/NetAlertX/blob/main/docs/docker-troubleshooting/port-conflicts.md
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══════════════════════════════════════════════════════════════════════════════
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EOF
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fi
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# # Check GraphQL Port
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# # We add a check to avoid double-warning if ports are identical AND in use
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# if [ "$PORT_APP" -ne "$PORT_GQL" ] && echo "$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://github.com/jokob-sk/NetAlertX/blob/main/docs/docker-troubleshooting/port-conflicts.md
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# ══════════════════════════════════════════════════════════════════════════════
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# EOF
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# fi |