146 lines
4.3 KiB
Bash
Executable File
146 lines
4.3 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
# Zero downtime deployment script (Blue-Green Strategy)
|
|
# Ensures application never goes down during updates
|
|
|
|
set -e
|
|
|
|
# Configuration
|
|
IMAGE_NAME="resource-governance"
|
|
REGISTRY="andersonid"
|
|
NAMESPACE="resource-governance"
|
|
TAG=${1:-"latest"}
|
|
FULL_IMAGE="$REGISTRY/$IMAGE_NAME:$TAG"
|
|
|
|
echo "Zero Downtime Deploy to OpenShift"
|
|
echo "================================="
|
|
echo "Image: $FULL_IMAGE"
|
|
echo "Namespace: $NAMESPACE"
|
|
echo "Strategy: Blue-Green (Zero Downtime)"
|
|
echo ""
|
|
|
|
# Check if logged into OpenShift
|
|
if ! oc whoami > /dev/null 2>&1; then
|
|
echo "ERROR: Not logged into OpenShift. Run: oc login"
|
|
exit 1
|
|
fi
|
|
|
|
echo "SUCCESS: Logged into OpenShift as: $(oc whoami)"
|
|
echo ""
|
|
|
|
# Function to check if all pods are ready
|
|
check_pods_ready() {
|
|
local deployment=$1
|
|
local namespace=$2
|
|
local timeout=${3:-300}
|
|
|
|
echo "Waiting for deployment $deployment pods to be ready..."
|
|
oc rollout status deployment/$deployment -n $namespace --timeout=${timeout}s
|
|
}
|
|
|
|
# Function to check if application is responding
|
|
check_app_health() {
|
|
local service=$1
|
|
local namespace=$2
|
|
local port=${3:-8080}
|
|
|
|
echo "Checking application health..."
|
|
|
|
# Try temporary port-forward for testing
|
|
local temp_pid
|
|
oc port-forward service/$service $port:$port -n $namespace > /dev/null 2>&1 &
|
|
temp_pid=$!
|
|
|
|
# Wait for port-forward to initialize
|
|
sleep 3
|
|
|
|
# Test health check
|
|
local health_status
|
|
health_status=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:$port/api/v1/health 2>/dev/null || echo "000")
|
|
|
|
# Stop temporary port-forward
|
|
kill $temp_pid 2>/dev/null || true
|
|
|
|
if [ "$health_status" = "200" ]; then
|
|
echo "SUCCESS: Application healthy (HTTP $health_status)"
|
|
return 0
|
|
else
|
|
echo "ERROR: Application not healthy (HTTP $health_status)"
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
# Apply basic manifests
|
|
echo "Applying basic manifests..."
|
|
oc apply -f k8s/namespace.yaml
|
|
oc apply -f k8s/rbac.yaml
|
|
oc apply -f k8s/configmap.yaml
|
|
|
|
# Check if deployment exists
|
|
if oc get deployment $IMAGE_NAME -n $NAMESPACE > /dev/null 2>&1; then
|
|
echo "Existing deployment found. Starting zero-downtime update..."
|
|
|
|
# Get current replica count
|
|
CURRENT_REPLICAS=$(oc get deployment $IMAGE_NAME -n $NAMESPACE -o jsonpath='{.spec.replicas}')
|
|
echo "Current replicas: $CURRENT_REPLICAS"
|
|
|
|
# Update deployment image
|
|
echo "Updating image to: $FULL_IMAGE"
|
|
oc set image deployment/$IMAGE_NAME $IMAGE_NAME=$FULL_IMAGE -n $NAMESPACE
|
|
|
|
# Wait for rollout with longer timeout
|
|
echo "Waiting for rollout (may take a few minutes)..."
|
|
if check_pods_ready $IMAGE_NAME $NAMESPACE 600; then
|
|
echo "SUCCESS: Rollout completed successfully!"
|
|
|
|
# Check application health
|
|
if check_app_health "${IMAGE_NAME}-service" $NAMESPACE; then
|
|
echo "Zero downtime deploy completed successfully!"
|
|
else
|
|
echo "WARNING: Deploy completed, but application may not be healthy"
|
|
echo "Check logs: oc logs -f deployment/$IMAGE_NAME -n $NAMESPACE"
|
|
fi
|
|
else
|
|
echo "ERROR: Rollout failed or timeout"
|
|
echo "Checking pod status:"
|
|
oc get pods -n $NAMESPACE -l app.kubernetes.io/name=$IMAGE_NAME
|
|
exit 1
|
|
fi
|
|
else
|
|
echo "Deployment does not exist. Creating new deployment..."
|
|
oc apply -f k8s/deployment.yaml
|
|
oc apply -f k8s/service.yaml
|
|
oc apply -f k8s/route.yaml
|
|
|
|
# Wait for pods to be ready
|
|
if check_pods_ready $IMAGE_NAME $NAMESPACE 300; then
|
|
echo "SUCCESS: New deployment created successfully!"
|
|
else
|
|
echo "ERROR: Failed to create deployment"
|
|
exit 1
|
|
fi
|
|
fi
|
|
|
|
# Check final status
|
|
echo ""
|
|
echo "FINAL STATUS:"
|
|
echo "============="
|
|
oc get deployment $IMAGE_NAME -n $NAMESPACE
|
|
echo ""
|
|
oc get pods -n $NAMESPACE -l app.kubernetes.io/name=$IMAGE_NAME
|
|
echo ""
|
|
|
|
# Get route URL
|
|
ROUTE_URL=$(oc get route $IMAGE_NAME-route -n $NAMESPACE -o jsonpath='{.spec.host}' 2>/dev/null || echo "")
|
|
if [ -n "$ROUTE_URL" ]; then
|
|
echo "Access URLs:"
|
|
echo " OpenShift: https://$ROUTE_URL"
|
|
echo " Port-forward: http://localhost:8080 (if active)"
|
|
echo ""
|
|
echo "To start port-forward: oc port-forward service/${IMAGE_NAME}-service 8080:8080 -n $NAMESPACE"
|
|
fi
|
|
|
|
echo ""
|
|
echo "Zero downtime deploy completed!"
|
|
echo "Strategy: Rolling Update with maxUnavailable=0 (zero downtime)"
|