What is a Multi-Cloud strategy?

Question

Accepted Answer

**Multi-Cloud** — Using two or more cloud providers simultaneously.

**Why:**
1. Avoid vendor lock-in.
2. High availability.
3. Cost (price comparison).
4. Regulatory compliance.

**Tools:** Terraform, Kubernetes, Crossplane.

**Multi-Cloud example with Terraform:**
```hcl
provider "aws" {
  region = "us-east-1"
}

provider "google" {
  project = "my-project"
  region  = "us-central1"
}

resource "aws_instance" "primary" {
  ami           = "ami-xxx"
  instance_type = "t3.micro"
}

resource "google_compute_instance" "secondary" {
  name         = "backup-server"
  machine_type = "e2-micro"
  zone         = "us-central1-a"
  boot_disk {
    initialize_params {
      image = "debian-cloud/debian-11"
    }
  }
}
```

**Challenges:** Management complexity, cross-provider egress, service incompatibility.

DevOps: What is a Multi-Cloud strategy?