mirror of
https://github.com/jokob-sk/NetAlertX.git
synced 2025-12-07 01:26:11 -08:00
69 lines
4.0 KiB
Bash
Executable File
69 lines
4.0 KiB
Bash
Executable File
#!/bin/sh
|
|
# check-ports.sh detects and warns if required ports are already in use
|
|
# or if they are configured to be the same.
|
|
# Intended for lightweight Alpine containers (uses busybox netstat).
|
|
|
|
# Define ports from ENV variables, applying defaults
|
|
PORT_APP=${PORT:-20211}
|
|
PORT_GQL=${APP_CONF_OVERRIDE:-${GRAPHQL_PORT:-20212}}
|
|
|
|
# Check if ports are configured to be the same
|
|
if [ "$PORT_APP" -eq "$PORT_GQL" ]; then
|
|
cat <<EOF
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
⚠️ Configuration Warning: Both ports are set to ${PORT_APP}.
|
|
|
|
The Application port (\$PORT) and the GraphQL API port
|
|
(\$APP_CONF_OVERRIDE or \$GRAPHQL_PORT) are configured to use the
|
|
same port. This will cause a conflict.
|
|
|
|
https://github.com/jokob-sk/NetAlertX/blob/main/docs/docker-troubleshooting/port-conflicts.md
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
EOF
|
|
fi
|
|
|
|
# Check for netstat (usually provided by busybox)
|
|
if ! command -v netstat >/dev/null 2>&1; then
|
|
cat <<EOF
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
⚠️ Configuration Error: 'netstat' command not found.
|
|
|
|
Cannot check port availability. Please ensure 'net-tools'
|
|
or the busybox 'netstat' applet is available in this container.
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
EOF
|
|
exit 0 # Exit gracefully, this is a non-fatal check
|
|
fi
|
|
|
|
# Fetch all listening TCP/UDP ports once.
|
|
# We awk $4 to get the 'Local Address' column (e.g., 0.0.0.0:20211 or :::20211)
|
|
LISTENING_PORTS=$(netstat -lntu | awk '{print $4}')
|
|
|
|
# Check Application Port
|
|
# We grep for ':{PORT}$' to match the port at the end of the string.
|
|
if echo "$LISTENING_PORTS" | grep -q ":${PORT_APP}$"; then
|
|
cat <<EOF
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
⚠️ Port Warning: Application port ${PORT_APP} is already in use.
|
|
|
|
The main application (defined by \$PORT) may fail to start.
|
|
|
|
https://github.com/jokob-sk/NetAlertX/blob/main/docs/docker-troubleshooting/port-conflicts.md
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
EOF
|
|
fi
|
|
|
|
# Check GraphQL Port
|
|
# We add a check to avoid double-warning if ports are identical AND in use
|
|
if [ "$PORT_APP" -ne "$PORT_GQL" ] && echo "$LISTENING_PORTS" | grep -q ":${PORT_GQL}$"; then
|
|
cat <<EOF
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
⚠️ Port Warning: GraphQL API port ${PORT_GQL} is already in use.
|
|
|
|
The GraphQL API (defined by \$APP_CONF_OVERRIDE or \$GRAPHQL_PORT)
|
|
may fail to start.
|
|
|
|
https://github.com/jokob-sk/NetAlertX/blob/main/docs/docker-troubleshooting/port-conflicts.md
|
|
══════════════════════════════════════════════════════════════════════════════
|
|
EOF
|
|
fi |