Implement autodiscovery for copy hosts and enhance interface detection in build-and-copy and launch-cluster scripts
This commit is contained in:
Eugene Rakhmatulin
168
autodiscover.sh
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168
autodiscover.sh
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#!/bin/bash
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# Function to detect IB and Ethernet interfaces
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detect_interfaces() {
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# If both interfaces are already set, nothing to do
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if [[ -n "$ETH_IF" && -n "$IB_IF" ]]; then
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return 0
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fi
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# Check for required tools
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if ! command -v ibdev2netdev &> /dev/null; then
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echo "Error: ibdev2netdev not found. Cannot auto-detect interfaces."
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return 1
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fi
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echo "Auto-detecting interfaces..."
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# Get all Up interfaces: "rocep1s0f1 port 1 ==> enp1s0f1np1 (Up)"
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# We capture: IB_DEV, NET_DEV
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mapfile -t IB_NET_PAIRS < <(ibdev2netdev | awk '/Up\)/ {print $1 " " $5}')
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if [ ${#IB_NET_PAIRS[@]} -eq 0 ]; then
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echo "Error: No active IB interfaces found."
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return 1
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fi
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DETECTED_IB_IFS=()
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CANDIDATE_ETH_IFS=()
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for pair in "${IB_NET_PAIRS[@]}"; do
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ib_dev=$(echo "$pair" | awk '{print $1}')
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net_dev=$(echo "$pair" | awk '{print $2}')
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DETECTED_IB_IFS+=("$ib_dev")
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# Check if interface has an IP address
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if ip addr show "$net_dev" | grep -q "inet "; then
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CANDIDATE_ETH_IFS+=("$net_dev")
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fi
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done
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# Set IB_IF if not provided
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if [[ -z "$IB_IF" ]]; then
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IB_IF=$(IFS=,; echo "${DETECTED_IB_IFS[*]}")
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echo " Detected IB_IF: $IB_IF"
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fi
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# Set ETH_IF if not provided
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if [[ -z "$ETH_IF" ]]; then
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if [ ${#CANDIDATE_ETH_IFS[@]} -eq 0 ]; then
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echo "Error: No active IB-associated interfaces have IP addresses."
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return 1
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fi
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# Selection logic: Prefer interface without capital 'P'
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SELECTED_ETH=""
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for iface in "${CANDIDATE_ETH_IFS[@]}"; do
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if [[ "$iface" != *"P"* ]]; then
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SELECTED_ETH="$iface"
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break
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fi
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done
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# Fallback: Use the first one if all have 'P' or none found yet
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if [[ -z "$SELECTED_ETH" ]]; then
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SELECTED_ETH="${CANDIDATE_ETH_IFS[0]}"
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fi
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ETH_IF="$SELECTED_ETH"
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echo " Detected ETH_IF: $ETH_IF"
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fi
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}
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# Function to detect local IP
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detect_local_ip() {
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if [[ -n "$LOCAL_IP" ]]; then
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return 0
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fi
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# Ensure interface is detected if not provided
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if [[ -z "$ETH_IF" ]]; then
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detect_interfaces || return 1
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fi
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# Get CIDR of the selected ETH_IF
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CIDR=$(ip -o -f inet addr show "$ETH_IF" | awk '{print $4}' | head -n 1)
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if [[ -z "$CIDR" ]]; then
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echo "Error: Could not determine IP/CIDR for interface $ETH_IF"
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return 1
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fi
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LOCAL_IP=${CIDR%/*}
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echo " Detected Local IP: $LOCAL_IP ($CIDR)"
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}
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# Function to detect cluster nodes
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detect_nodes() {
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detect_local_ip || return 1
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# If nodes are already set, populate PEER_NODES and return
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if [[ -n "$NODES_ARG" ]]; then
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PEER_NODES=()
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IFS=',' read -ra ALL_NODES <<< "$NODES_ARG"
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for node in "${ALL_NODES[@]}"; do
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node=$(echo "$node" | xargs)
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if [[ "$node" != "$LOCAL_IP" ]]; then
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PEER_NODES+=("$node")
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fi
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done
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return 0
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fi
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echo "Auto-detecting nodes..."
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if ! command -v nc &> /dev/null; then
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echo "Error: nc (netcat) not found. Please install netcat."
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return 1
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fi
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if ! command -v python3 &> /dev/null; then
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echo "Error: python3 not found. Please install python3."
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return 1
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fi
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DETECTED_IPS=("$LOCAL_IP")
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PEER_NODES=()
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echo " Scanning for SSH peers on $CIDR..."
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# Generate list of IPs using python
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ALL_IPS=$(python3 -c "import ipaddress, sys; [print(ip) for ip in ipaddress.ip_network(sys.argv[1], strict=False).hosts()]" "$CIDR")
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TEMP_IPS_FILE=$(mktemp)
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# Scan in parallel
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for ip in $ALL_IPS; do
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# Skip own IP
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if [[ "$ip" == "$LOCAL_IP" ]]; then continue; fi
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(
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# Check port 22 with 1 second timeout
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if nc -z -w 1 "$ip" 22 &>/dev/null; then
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echo "$ip" >> "$TEMP_IPS_FILE"
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fi
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) &
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done
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# Wait for all background scans to complete
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wait
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# Read found IPs
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if [[ -f "$TEMP_IPS_FILE" ]]; then
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while read -r ip; do
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DETECTED_IPS+=("$ip")
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PEER_NODES+=("$ip")
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echo " Found peer: $ip"
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done < "$TEMP_IPS_FILE"
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rm -f "$TEMP_IPS_FILE"
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fi
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# Sort IPs
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IFS=$'\n' SORTED_IPS=($(sort <<<"${DETECTED_IPS[*]}"))
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unset IFS
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NODES_ARG=$(IFS=,; echo "${SORTED_IPS[*]}")
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echo " Cluster Nodes: $NODES_ARG"
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}
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