fix: I dunno, I'm making git server changes

scripts/ci/switch-traffic.sh

@@ -0,0 +1,157 @@
+#!/bin/bash
+# Traffic switching script for blue-green deployment
+# Updates Traefik weighted routing configuration
+#
+# Usage: ./switch-traffic.sh <target_stack> [mode]
+#   target_stack: blue or green (the stack to switch TO)
+#   mode: instant (default) or gradual
+#
+# Gradual mode: 25% -> 50% -> 75% -> 100% with 3s intervals
+#
+# Exit codes:
+#   0 - Traffic switch successful
+#   1 - Switch failed
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+
+TARGET_STACK="${1:-}"
+MODE="${2:-instant}"
+
+if [[ -z "$TARGET_STACK" ]] || [[ ! "$TARGET_STACK" =~ ^(blue|green)$ ]]; then
+  echo "Usage: $0 <blue|green> [instant|gradual]"
+  exit 1
+fi
+
+TRAEFIK_CONFIG="$PROJECT_ROOT/config/traefik/dynamic/blue-green.yml"
+STATE_FILE="$PROJECT_ROOT/config/deployment/state.json"
+
+if [[ ! -f "$TRAEFIK_CONFIG" ]]; then
+  echo "ERROR: Traefik config not found: $TRAEFIK_CONFIG"
+  exit 1
+fi
+
+echo "========================================"
+echo "Traffic Switch"
+echo "Target Stack: $TARGET_STACK"
+echo "Mode: $MODE"
+echo "========================================"
+
+# Determine source and target weights
+if [[ "$TARGET_STACK" == "blue" ]]; then
+  SOURCE_STACK="green"
+else
+  SOURCE_STACK="blue"
+fi
+
+# Function to update weights in Traefik config
+update_weights() {
+  local blue_weight="$1"
+  local green_weight="$2"
+
+  echo "  Setting weights: blue=$blue_weight, green=$green_weight"
+
+  # Use sed to update weights in the YAML file
+  # Frontend blue weight
+  sed -i.bak -E "s/(name: mvp-frontend-blue-svc[[:space:]]+weight:)[[:space:]]+[0-9]+/\1 $blue_weight/" "$TRAEFIK_CONFIG"
+  # Frontend green weight
+  sed -i.bak -E "s/(name: mvp-frontend-green-svc[[:space:]]+weight:)[[:space:]]+[0-9]+/\1 $green_weight/" "$TRAEFIK_CONFIG"
+  # Backend blue weight
+  sed -i.bak -E "s/(name: mvp-backend-blue-svc[[:space:]]+weight:)[[:space:]]+[0-9]+/\1 $blue_weight/" "$TRAEFIK_CONFIG"
+  # Backend green weight
+  sed -i.bak -E "s/(name: mvp-backend-green-svc[[:space:]]+weight:)[[:space:]]+[0-9]+/\1 $green_weight/" "$TRAEFIK_CONFIG"
+
+  # Clean up backup files
+  rm -f "${TRAEFIK_CONFIG}.bak"
+
+  # Traefik watches the file and reloads automatically
+  # Give it a moment to pick up changes
+  sleep 1
+}
+
+# Verify Traefik has picked up the changes
+verify_traefik_reload() {
+  # Give Traefik time to reload config
+  sleep 2
+
+  # Check if Traefik is still healthy
+  if docker exec mvp-traefik traefik healthcheck > /dev/null 2>&1; then
+    echo "  OK: Traefik config reloaded"
+    return 0
+  else
+    echo "  WARNING: Could not verify Traefik health"
+    return 0  # Don't fail on this, file watcher is reliable
+  fi
+}
+
+if [[ "$MODE" == "gradual" ]]; then
+  echo ""
+  echo "Gradual traffic switch starting..."
+  echo "----------------------------------------"
+
+  if [[ "$TARGET_STACK" == "blue" ]]; then
+    STEPS=("25 75" "50 50" "75 25" "100 0")
+  else
+    STEPS=("75 25" "50 50" "25 75" "0 100")
+  fi
+
+  step=1
+  for weights in "${STEPS[@]}"; do
+    blue_w=$(echo "$weights" | cut -d' ' -f1)
+    green_w=$(echo "$weights" | cut -d' ' -f2)
+
+    echo ""
+    echo "Step $step/4: blue=$blue_w%, green=$green_w%"
+    update_weights "$blue_w" "$green_w"
+    verify_traefik_reload
+
+    if [[ $step -lt 4 ]]; then
+      echo "  Waiting 3 seconds before next step..."
+      sleep 3
+    fi
+
+    step=$((step + 1))
+  done
+
+else
+  # Instant switch
+  echo ""
+  echo "Instant traffic switch..."
+  echo "----------------------------------------"
+
+  if [[ "$TARGET_STACK" == "blue" ]]; then
+    update_weights 100 0
+  else
+    update_weights 0 100
+  fi
+
+  verify_traefik_reload
+fi
+
+# Update state file
+echo ""
+echo "Updating deployment state..."
+echo "----------------------------------------"
+
+if [[ -f "$STATE_FILE" ]] && command -v jq &> /dev/null; then
+  TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+
+  jq --arg active "$TARGET_STACK" \
+     --arg inactive "$SOURCE_STACK" \
+     --arg ts "$TIMESTAMP" \
+     '.active_stack = $active | .inactive_stack = $inactive | .last_switch = $ts' \
+     "$STATE_FILE" > "${STATE_FILE}.tmp" && mv "${STATE_FILE}.tmp" "$STATE_FILE"
+
+  echo "  Active stack: $TARGET_STACK"
+  echo "  Inactive stack: $SOURCE_STACK"
+fi
+
+echo ""
+echo "========================================"
+echo "Traffic Switch COMPLETE"
+echo "All traffic now routed to: $TARGET_STACK"
+echo "========================================"
+
+exit 0