Service Health Checks with Retries

Service Health Checks with Retries

Exponential backoff health check loop:

wait_for_service() {
    local url="$1"
    local retries=5
    local wait_sec=2
    until curl -sSf "$url" >/dev/null || [ $retries -eq 0 ]; do
        echo "Service unavailable, retrying in ${wait_sec}s..."
        sleep "$wait_sec"
        (( retries-- ))
        (( wait_sec *= 2 ))
    done
}