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Logging In

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Accessing the Cluster

Camber provides HPC clusters for various computational workloads. Connect to the cluster at:

  • HPC Cluster URL: hpc.cambercloud.com

To access the cluster via SSH:

ssh <username>@hpc.cambercloud.com

Replace <username> with your actual Camber username.

SSH Key Setup

Secure cluster access requires SSH key authentication. You can either generate a new key pair through the CamberCloud portal or upload an existing one.

Option 1: Generate New Key Pair

  1. Sign in to the CamberCloud web portal at https://app.cambercloud.com/login
  2. Navigate to Profile > Security and Access > SSH Keys
  3. Click Generate New Key
  4. Download the private key file (.pem) immediately — this is your only opportunity to retrieve it
  5. The corresponding public key will be automatically added to your account

Option 2: Use Existing Key Pair

If you don’t have an SSH key pair, create one locally:

# Preferred: ED25519 (more secure)
ssh-keygen -t ed25519

# Alternative: RSA (widely compatible)
ssh-keygen -t rsa -b 4096

To upload your existing public key:

  1. Log in to the web portal at https://app.cambercloud.com/login

  2. You’ll see the CamberCloud profile page:

    CamberCloud Profile

  3. Click Add new key, enter a descriptive name, and paste your public key content (typically from your *.pub file):

    Add SSH Key

Connecting to the Cluster

Use the following commands to connect, specifying the path to your private key if it’s not in the default location. The -i flag specifies the identity file for authentication:

# Using a generated key from Option 1
ssh -i /path/to/downloaded/private-key.pem username@hpc.cambercloud.com

# Using an existing ED25519 key
ssh -i ~/.ssh/id_ed25519 username@hpc.cambercloud.com

# Using an existing RSA key
ssh -i ~/.ssh/id_rsa username@hpc.cambercloud.com

SSH Configuration (Optional)

Simplify connections by creating an SSH configuration file. This allows you to use short aliases like ssh camber-prod.

Edit or create ~/.ssh/config and add:

Host camber-prod
    HostName hpc.cambercloud.com
    User your_username           # Replace with your actual username
    IdentityFile ~/.ssh/id_ed25519  # Path to your private key

Now you can connect simply with:

ssh camber-prod

Troubleshooting SSH

If you encounter connection issues, try these solutions:

Permission Denied (publickey)

  • Verify your private key is correct and the public key is registered in the portal
  • Check key file permissions: chmod 600 /path/to/private-key
  • Ensure you’re using the correct username and hostname

Connection Refused or Timed Out

  • Confirm the cluster URL: hpc.cambercloud.com
  • Check your internet connection and firewall settings
  • Verify cluster status via the Camber portal or contact support

Key Not Recognized

  • Add the key to your SSH agent:
    ssh-add /path/to/private-key
  • Use verbose mode for debugging:
    ssh -v username@hpc.cambercloud.com

Cannot Reach Server

  • Test connectivity with:
    ping hpc.cambercloud.com
  • If unreachable, contact the support team to check cluster status

Unsupported Key Format

  • Camber supports ssh-ed25519 and ssh-rsa formats only
  • Regenerate your key pair if using another format

Lost Private Key

  • Generate a new key pair via the portal

Security Best Practices

  • Keep your private key secure — never share it or upload it anywhere
  • Only upload the public key to the Camber portal
  • Supported key formats: ssh-ed25519 and ssh-rsa
  • Lost private key? Generate a new key pair via the portal immediately
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