Add GCP wait-start-ssh helper

scripts/gcp_wait_start_ssh.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+# meshai-a100-trainer: start + SSH hazir olana kadar bekle / tekrar dene.
+# Cloud Shell veya gcloud kurulu herhangi bir makinede:
+#   bash scripts/gcp_wait_start_ssh.sh
+#   bash scripts/gcp_wait_start_ssh.sh --no-ssh          # sadece ac, SSH yapma
+#   bash scripts/gcp_wait_start_ssh.sh --cmd 'cd ~/MeshAI_Cloud && ...'
+
+set -euo pipefail
+
+INSTANCE="${INSTANCE:-meshai-a100-trainer}"
+ZONE="${ZONE:-europe-west4-a}"
+MAX_ATTEMPTS="${MAX_ATTEMPTS:-60}"
+SLEEP_SEC="${SLEEP_SEC:-20}"
+DO_SSH=1
+REMOTE_CMD=""
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --no-ssh) DO_SSH=0; shift ;;
+    --cmd) REMOTE_CMD="$2"; shift 2 ;;
+    --zone) ZONE="$2"; shift 2 ;;
+    --instance) INSTANCE="$2"; shift 2 ;;
+    *) echo "Bilinmeyen arg: $1"; exit 1 ;;
+  esac
+done
+
+log() { echo "[$(date '+%H:%M:%S')] $*"; }
+
+need_gcloud() {
+  if ! command -v gcloud >/dev/null 2>&1; then
+    echo "HATA: gcloud yok. Bu scripti Cloud Shell'de calistir."
+    exit 1
+  fi
+}
+
+instance_status() {
+  gcloud compute instances describe "$INSTANCE" --zone="$ZONE" --format='get(status)' 2>/dev/null || echo "UNKNOWN"
+}
+
+ensure_started() {
+  local st
+  st="$(instance_status)"
+  log "Durum: $st"
+  if [[ "$st" == "RUNNING" ]]; then
+    return 0
+  fi
+  if [[ "$st" == "STAGING" || "$st" == "PROVISIONING" || "$st" == "STOPPING" ]]; then
+    log "Gecis durumu ($st) — bekleniyor..."
+    return 1
+  fi
+  # TERMINATED / STOPPED / SUSPENDED / UNKNOWN
+  log "Start deneniyor: $INSTANCE ($ZONE)"
+  if gcloud compute instances start "$INSTANCE" --zone="$ZONE"; then
+    log "Start komutu OK"
+    return 0
+  fi
+  log "Start basarisiz — tekrar denenecek"
+  return 1
+}
+
+ssh_ready() {
+  # Exit 0 if SSH accepts a trivial command
+  gcloud compute ssh "$INSTANCE" --zone="$ZONE" --command="echo SSH_OK" --quiet 2>/dev/null | grep -q SSH_OK
+}
+
+need_gcloud
+log "Hedef: $INSTANCE / $ZONE (max $MAX_ATTEMPTS x ${SLEEP_SEC}s)"
+
+attempt=0
+while (( attempt < MAX_ATTEMPTS )); do
+  attempt=$((attempt + 1))
+  log "Deneme $attempt/$MAX_ATTEMPTS"
+
+  ensure_started || true
+  sleep 5
+
+  st="$(instance_status)"
+  if [[ "$st" != "RUNNING" ]]; then
+    log "Henuz RUNNING degil ($st) — ${SLEEP_SEC}s"
+    sleep "$SLEEP_SEC"
+    continue
+  fi
+
+  log "RUNNING — SSH kontrol..."
+  if ssh_ready; then
+    log "SSH hazir."
+    if [[ "$DO_SSH" -eq 0 ]]; then
+      log " --no-ssh: cikis (VM acik)"
+      exit 0
+    fi
+    if [[ -n "$REMOTE_CMD" ]]; then
+      log "Uzak komut calistiriliyor..."
+      gcloud compute ssh "$INSTANCE" --zone="$ZONE" --command="$REMOTE_CMD"
+      exit $?
+    fi
+    log "Interaktif SSH aciliyor..."
+    exec gcloud compute ssh "$INSTANCE" --zone="$ZONE"
+  fi
+
+  log "SSH henuz yok — ${SLEEP_SEC}s sonra tekrar"
+  sleep "$SLEEP_SEC"
+done
+
+log "HATA: $MAX_ATTEMPTS denemede SSH hazir olmadi."
+exit 1