Upgrade Alibaba Cloud verification level How to Apply for Alibaba Cloud ECS Instances

Alibaba Cloud / 2026-07-06 17:33:56

Upgrade Alibaba Cloud verification level Overview: What You’ll Be Able to Do

Alibaba Cloud’s Elastic Compute Service (ECS) is a straightforward way to get scalable virtual machines in the cloud. If you’ve used AWS EC2 or similar services before, the flow will feel familiar: you choose an instance, configure networking and storage, add security settings, and then connect to the machine to install your software.

Upgrade Alibaba Cloud verification level This guide walks you through the practical “apply and launch” process for Alibaba Cloud ECS instances, from preparing your account to getting a secure remote connection. It’s written for beginners, but it also highlights common mistakes that cost time.

Before You Start: Account and Access Setup

Create or Prepare Your Alibaba Cloud Account

To apply for ECS instances, you need an Alibaba Cloud account that can access ECS resources. If you’re new, complete the basic registration steps first.

Most users will also need to set up identity verification and billing permissions. Even if you can browse the console, you may be blocked from launching instances until billing and verification are in place.

Check Your Region and Network Requirements Early

Upgrade Alibaba Cloud verification level ECS is deployed by region and availability zone. Your choice affects latency, compliance, and sometimes the availability of certain instance families.

Before selecting an ECS instance, decide where you want it to run. Ask yourself:

Upgrade Alibaba Cloud verification level Do you need to serve users in a specific geography?
Will you connect to other cloud services in the same region?
Do you have data residency requirements?

Choosing the wrong region later can lead to extra networking work, like cross-region connections or re-creating resources.

Step 1: Open ECS in the Alibaba Cloud Console

Log in to the Alibaba Cloud console, search for “ECS” (Elastic Compute Service), and open the ECS page. From there, you’ll typically see options such as “Instances,” “Buying,” or “Create Instance.”

Look for a button or menu item labeled something like “Create Instance.” This is the start of the actual “apply” process.

Step 2: Choose the Instance Type (Specifications)

Select Instance Family and Size

ECS instances come in different families and sizes, each optimized for particular workloads. The most common approach is to pick based on your CPU and memory needs.

Upgrade Alibaba Cloud verification level When you see a list of instance types, read the labels carefully. Two users can pick the same “size” but different families, and the performance profile can vary.

For a new project, choose based on a conservative estimate, then scale later. Overbuying can waste budget; underbuying can slow your work. A practical rule is:

If you’re hosting a small web app or learning, start small (enough for OS + your services).
If you’re running databases or heavy workloads, plan for memory and I/O needs.
If you want a bursty workload, check whether the instance family supports that pattern well.

Choose the Billing Method (Pay-as-You-Go vs Subscription)

Alibaba Cloud usually offers different billing models. Two common ones are:

Pay-as-you-go: You pay based on actual usage. Good for experiments and flexible workloads.
Subscription/Reserved-like options: Often cheaper for longer periods. Good for stable long-term needs.

Make the choice based on how certain you are about duration. If you’re testing a setup, pay-as-you-go reduces risk.

Upgrade Alibaba Cloud verification level Step 3: Pick the OS Image and System Type

Select an Operating System Image

ECS instances require an operating system image. Alibaba Cloud typically provides a list of public images, including common Linux distributions and sometimes Windows images.

For Linux beginners, selecting a mainstream distribution is the safest path because documentation and tutorials are easier to follow.

Consider also the version. Using a newer stable OS can improve security, but some legacy applications might require older versions.

Enable or Consider Customization (If Offered)

Depending on the console options, you may see ways to customize the instance at launch (for example, setting up initial scripts, keys, or default software). If you don’t need automation right now, keep it simple and focus on getting a secure, working server first.

Step 4: Configure Networking (VPC, Subnet, and Security)

Understand VPC vs Default Networking

Most ECS setups use a Virtual Private Cloud (VPC) for isolation. A VPC lets you control IP ranges and network boundaries. You may be able to choose an existing VPC or create a new one.

If you’re launching your first ECS instance, creating a new VPC is often easiest. However, don’t create resources blindly—plan your IP ranges so you won’t need to rework them later.

Select a Subnet and IP Plan

Within a VPC, you’ll choose a subnet. The subnet controls the IP range and affects networking behavior.

Pay attention to whether the instance should have a public IP (for direct internet access). If your goal is to manage the server from your laptop or office network, you’ll need a route to reach it. If your goal is to keep it private, you’ll connect via a VPN or a bastion host instead.

Security Group: Your First Line of Defense

A security group is where you define inbound and outbound rules. Even if you choose an OS correctly, misconfigured security rules can create security risks or prevent your access.

For SSH access to a Linux ECS instance, you typically need an inbound rule for port 22. For a web server, you may need port 80 (HTTP) and/or port 443 (HTTPS).

Upgrade Alibaba Cloud verification level Key safety guidance:

Restrict the source IP range as much as possible (for example, your office IP, not the entire internet).
Avoid opening SSH to anywhere unless you have no alternative.
Only open the ports you actually need.

If you’re not sure what to open, start minimal: SSH (22) for admin access, and add web ports later when your app is ready.

Step 5: Storage Configuration (Disk Type and Size)

Choose Disk Size Based on Real Needs

ECS includes system disk storage. You must choose the disk size during creation. It’s tempting to choose the smallest size, but you’ll want room for:

The OS itself
Your application files
Logs
Package updates and dependencies

For early testing, a modest size can be enough. For production workloads, plan for growth and log storage. Many projects end up resizing later, but it’s better to start with sensible capacity.

Consider Disk Performance Needs

Depending on available options, you may choose disk performance tiers (for example, standard vs higher-performance). If you’re running a database or high I/O service, disk performance matters.

If your workload is unknown, pick a balanced configuration and monitor performance after launch.

Upgrade Alibaba Cloud verification level Step 6: Authentication Method (Password or SSH Key)

Prefer SSH Keys for Linux Instances

For Linux servers, the safest and most common practice is to use SSH keys instead of passwords. SSH keys are harder to brute-force and generally more manageable.

In the ECS creation flow, you may see options to:

Paste an existing public key
Select or create a key pair
Use password authentication (less recommended)

If the console offers key management, create or upload your SSH key pair and keep your private key secure.

If Using Password Authentication, Set a Strong Password

If you must use password authentication (for example, during a learning phase), use a strong, unique password and avoid leaving it unchanged. Treat the server like an important system from day one.

Step 7: Review All Settings Before Launch

Before clicking “Create” or “Buy Now,” review the key settings:

Region and zone
Instance type and billing method
OS image
Networking setup (VPC/subnet)
Security group inbound rules
Public IP requirement
Disk size
Authentication method (key/password)

This review matters because mistakes—like enabling public SSH too broadly—can create security exposure immediately after the instance starts.

Step 8: Create the ECS Instance and Confirm It Is Running

After you submit the creation request, Alibaba Cloud will provision the instance. This can take a few minutes.

Once the instance state changes to “Running” (or equivalent), you can proceed to connect.

Step 9: Connect to Your ECS Instance

Get the Public IP and Connection Details

To connect from your computer, you need the instance’s accessible address and authentication credentials.

In the ECS console, look for:

Public IP address (if you enabled it)
Username (often based on the OS image)
SSH key usage details or password

Make sure your local IP is allowed by your security group rules.

Connect to Linux via SSH

On your local machine, you can use SSH to connect. The command format typically looks like:

ssh -i <your_private_key> <username>@<public_ip>

If you can’t connect, the most common causes are:

Security group doesn’t allow your IP to reach port 22
Wrong username for the selected OS image
Wrong key (using a different private key than the one configured)
Instance isn’t actually running or the network isn’t ready

Connect to Windows (If You Chose Windows)

If your ECS is based on Windows, connection usually uses Remote Desktop (RDP). In that case, you’ll need the RDP credentials, and you must allow inbound traffic for the RDP port through security rules.

Windows login steps also depend on whether you configured password authentication, generated credentials, or used an approved mechanism for initial login.

Step 10: Basic Hardening After You Log In

Launching the instance is not the end. A quick baseline setup helps prevent common problems.

Update the System

Upgrade Alibaba Cloud verification level After logging in, update packages and security patches. Many fresh images still need updates, especially if time has passed since the image was created.

Create an Admin User (Optional but Recommended)

Depending on the OS, you may have a default user account. A good practice is to create a dedicated admin account and restrict direct access.

Upgrade Alibaba Cloud verification level This is especially important if you plan to share access with teammates. Keep controls clean and auditable.

Verify Firewall Rules and Open Ports Carefully

Even if your cloud security group is configured, the instance OS firewall can still block or allow ports. Confirm that only required services are reachable.

Set Up Key-Based Access Consistently

If you used SSH keys at launch, confirm that key-based login is enabled and that password-based login is disabled if you want stronger security.

If you’re unsure, start by keeping password login enabled only temporarily, then tighten the configuration once everything works.

Cost Awareness: Avoid Surprises

ECS is billed based on compute time and selected options. A few practical reminders:

If you’re experimenting, choose a short usage plan or pay-as-you-go so costs stay manageable.
Stopping an instance may reduce compute charges, but some resources (like certain disk storage or IP resources) can still incur costs depending on configuration.
Unused public exposure (like open ports) can create security and operational risk.

If you’re unsure about what exactly is billed in your setup, review your billing dashboard and check resource-level cost information.

Troubleshooting: Common Problems and Fixes

“I Can’t Connect” After the Instance Is Running

Use a simple checklist:

Confirm the instance is in a running state.
Confirm your security group allows inbound traffic to the right port from your IP.
Confirm you used the correct authentication method (the right key or correct password).
Confirm the username matches the OS image.

“The Port Is Open in the Security Group, Still No Access”

If your security group is correct but you still can’t connect, check the OS firewall and service status.

For SSH, ensure the SSH service is running.
Verify your OS-level firewall permits the port.
Check network configuration inside the instance.

Wrong Region Choice Later

If you discover that your other cloud services are in a different region, you may face cross-region connectivity challenges. In that case, you have two options:

Recreate the ECS instance in the correct region
Implement cross-region networking with the necessary routing and security rules

For first-time setups, recreating in the correct region is often faster and cleaner.

Scaling and Next Steps After Launch

Once your ECS instance is stable, you can move beyond the initial “apply” step. Common next moves include:

Deploy your application and set up a process manager
Configure a domain name and HTTPS (if needed)
Set up monitoring for CPU, memory, disk, and network
Prepare backups and snapshots
Consider load balancing if traffic grows

For teams, you can also automate deployments and instance provisioning so new environments are consistent.

Quick Checklist: From Zero to Connected ECS

Have an Alibaba Cloud account with ECS access and billing enabled
Choose region and VPC/subnet thoughtfully
Select instance type, billing method, and OS image
Configure security group rules (minimum required ports)
Choose authentication method (prefer SSH keys for Linux)
Select disk size based on your needs
Create the instance and confirm it is running
Connect using SSH/RDP and verify services
Harden the system: updates, firewall/service checks, safer access

If you follow this order and verify each step, applying for and launching an Alibaba Cloud ECS instance becomes a repeatable routine rather than a confusing checklist.