Customizing Linux CVM Configurations

Last updated: 2021-12-13 16:02:15

    Custom configuration provides more image platforms and advanced configurations for storage, bandwidth, and security group. You can select the configuration mode as needed. This document uses custom configuration as an example.

    Registration and Verification

    Before using a CVM, you need to perform the following operations:

    1. Sign up for a Tencent Cloud account and complete identity verification.
      A new user needs to sign up for an account on the Tencent Cloud website. For details, see Signing up for a Tencent Cloud Account.
    2. Visit the Tencent CVM Introduction page, and click Get Started.

    Selecting a Device Model

    1. Configure the following information as prompted by the page:
      Select the Region and Model
      CategoryRequired/OptionalConfiguration Description
      Billing ModeRequired
      • Pay as you go: an elastic billing mode for the CVM.
      RegionRequiredWe recommend you select a region closest to your customer to reduce access latency and increase access speed.
      Availability ZoneRequiredSelect an availability zone as needed.
      If you want to purchase multiple CVMs, we recommend you select different availability zones to implement disaster recovery.
      NetworkRequiredA logically isolated network space built in Tencent Cloud. A virtual private cloud (VPC) includes at least one subnet. The system provides a default VPC and subnet for each region.
      If the existing VPC or subnet does not meet your requirements, you can create a VPC or subnet on the VPC Console.
      • resources in the same VPC can be shared within the private network.
      • When purchasing the CVM, ensure that the CVM and the subnet where the CVM is created have the same availability zones.
      InstanceRequiredTencent Cloud provides different instance types based on the underlying hardware. For optimal performance, we recommend you use the instance types of the latest generation.
      For more information on instances, see Instance Types.
      ImageRequiredTencent Cloud provides public images, custom images, and shared images. For more information on images, seeImage Types Overview.
      If you have just started using Tencent Cloud, we recommend you choose public images.
      System DiskRequiredUsed to install the operating system. Its default capacity is 50 GB.
      Available Cloud Block Storage (CBS) types vary with regions. Please select a value as instructed by the page.
      For more information on CBS, see CBS Types.
      Data DiskOptionalUsed to scale up the storage capacity of the CVM to ensure high efficiency and reliability. CBS data disks are not added by default.
      For more information on CBS, see CBS Types.
      Public Network BandwidthRequiredTencent Cloud provides two network billing modes. Set a value as needed.
      • Bill-by-bandwidth: select a fixed bandwidth. Packet loss will occur when the bandwidth exceeds this value. This is applicable to scenarios where the network connection fluctuates slightly.
      • Bill-by-traffic: billing is based on traffic that is actually used. You can specify a peak bandwidth to prevent charges incurred by unexpected traffic. Packet loss will occur when the instantaneous bandwidth exceeds this value. This is applicable to scenarios where the network connection fluctuates significantly.
      Public GatewayOptionalAs a network interface between the VPC and the public network, the public gateway can forward requests of CVMs that are within different subnets of the VPC and have no public IP addresses.
      Note: Tencent Cloud discontinued configuring the public gateway on the CVM purchase page after December 6, 2019. To configure the public gateway, see Configuring a Public Gateway.
      QuantityRequiredNumber of CVMs to be purchased.
    2. Click Next: Complete Configuration to access the CVM configuration page.

    Configuring the CVM

    1. Configure the following information as prompted by the page:
      Security Group and CVM
      CategoryRequired/OptionalConfiguration Description
      ProjectRequiredThe default project is selected. You can select an existing project as needed to manage different CVMs.
      Security GroupRequiredUsed to configure the network access policies for one or more CVMs.
      Ensure that login port 22 is open.For more information, see Security Groups.
      Instance NameOptionalThe name of the CVM to be created.
      It is defined by the user. We recommend CVM-01.
      Login MethodRequiredConfigure the method to log in to the CVM as needed.
      • Custom Password: customize the password for logging in to the instance.
      • SSH Key Pair: associate the instance with a SSH key to ensure a secure login to the CVM.
        If no key is available or existing keys are inappropriate, click Create Now to create a key. For more information on SSH keys, see SSH Keys.
      • Random Password: an automatically generated password will be sent through theMessage Center.
      Security ServiceOptionalBy default, security service is enabled for free to help you build a CVM security system to prevent data leakage.
      Cloud MonitoringOptionalBy default, cloud monitoring is enabled for free. It provides comprehensive CVM data monitoring, intelligent data analysis, real-time fault alarms, and custom data reports to precisely monitor Tencent Cloud services and the health conditions of CVMs.
      Advanced SettingsOptionalConfigure additional settings for the instance as needed.
      • Hostname: you can customize the name of the computer in the CVM operating system. After a CVM is created, you can log in to the CVM to view the hostname.
      • CAM role: you can set a role and use it to grant role entity the permissions to access CVM services and resources and perform operations in Tencent Cloud. For more information about the settings, see Managing Roles.
      • Placement Group: you can add an instance to a placement group as needed to improve service availability. For more information, see Placement Group.
      • Tag: you can specify a tag to manage CVM resources by category. For more information, see User Guide on Tags.
      • Custom Data: you can configure an instance by specifying custom data, and the configured scripts will run when an instance is launched. If multiple CVMs are purchased together, the custom data will run on all CVMs. The Linux operating system supports the Shell format and a maximum of 16 KB of raw data. For details, see Configuring Custom Data (Linux CVM).
        Note: custom data configuration only supports certain common images with the Cloud-init service. For more information, see Cloud-Init & Cloudbase-Init.
    2. Click Next: Confirm Configuration to access the configuration information confirmation page.

    Confirming the Configuration Information

    1. Validate the information of the CVM to be purchased and the cost details of each configuration item.
    2. Click Purchase and complete the payment. Then, you can log in to the CVM Console to see your CVM.
      Information such as the instance name, public IP address, private IP address, login username, and initial login password of the CVM will be sent to your account through the Message Center. You can use this information to log in to and manage your instances. To ensure the security of your CVM, please change your CVM login password as soon as possible.

    Logging in to and Connecting the Instance

    After completing CVM operations, you can log in to your CVM on the Tencent Cloud Console and perform operations such as building a site as needed.
    Select a method for logging in to the CVM on the Tencent Cloud Console as needed:

    Partitioning and Formatting the Data Disk

    If you added a data disk when selecting the instance type, you need to format and partition the data disk after logging in to the CVM instance. If you have not added any data disks, skip this step.
    Select the appropriate operations guide according to the disk capacity and the CVM operating system.

    For more operations, see Initialization Scenarios.