• Elastic Cloud Server

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  5. Accessing and Using ECSs
  6. ECSs and Other Services

ECSs and Other Services

Figure 1 shows the relationships between ECS and other services.
Figure 1 Relationships between ECS and other services

ECS-related Services

  • Auto Scaling (AS)

    Automatically adjusts ECS service resources based on the configured AS policies. This improves resource usage and reduces resource costs.

  • Elastic Load Balancing (ELB)

    Automatically distributes traffic to multiple ECSs. This enhances system service and fault tolerance capabilities.

  • Elastic Volume Service (EVS)

    Enables you to attach EVS disks to an ECS and expand their capacity.

  • Virtual Private Cloud (VPC)

    Enables you to configure internal networks and change network configurations by customizing security groups, VPNs, IP address segments, and bandwidth. This simplifies network management. You can also customize the ECS access rules within a security group and between security groups to strengthen ECS security protection.

  • Image Management Service (IMS)

    Enables you to create ECSs using images. This improves the efficiency of ECS creation.

  • Cloud Eye

    Allows you to check the status of monitored service objects after you have obtained an ECS. This can be done without requiring additional plug-ins be installed. Table 1 lists the ECS metrics supported by Cloud Eye.

    Table 1 ECS metrics

    Metric

    Description

    Formula

    Remarks

    CPU Usage

    Indicates the vCPU usage (%) of an ECS.

    vCPU usage of an ECS/Number of vCPUs in the ECS

    N/A

    Memory Usage

    Indicates the memory usage (%) of an ECS.

    Used memory of an ECS/Total memory of the ECS

    This metric is unavailable if the image has no OTC Tools installed.

    Disk Usage

    Indicates the disk usage (%) of an ECS.

    Used capacity of an ECS disk/Total capacity of the ECS disk

    This metric is unavailable if the image has no OTC Tools installed.

    Disk Read Bandwidth

    Indicates the number of bytes read from an ECS per second.

    Total number of bytes read from an ECS disk/Monitoring period

    byte_out = (rd_bytes - last_rd_bytes) /Time difference

    Disk Write Bandwidth

    Indicates the number of bytes written to an ECS per second.

    Total number of bytes written to an ECS disk/Monitoring period

    N/A

    Disk Read IOPS

    Indicates the number of read requests sent to an ECS per second.

    Total number of read requests sent to an ECS disk/Monitoring period

    req_out = (rd_req - last_rd_req)/Time difference

    Disk Write IOPS

    Indicates the number of write requests sent to an ECS per second.

    Total number of write requests sent to an ECS disk/Monitoring period

    req_in = (wr_req - last_wr_req)/Time difference

    Inband Incoming Rate

    Indicates the number of incoming bytes on an ECS per second.

    Total number of inband incoming bytes on an ECS/Monitoring period

    N/A

    Inband Outgoing Rate

    Indicates the number of outgoing bytes on an ECS per second.

    Total number of inband outgoing bytes on an ECS/Monitoring period

    N/A

    Outband Incoming Rate

    Indicates the number of incoming bytes on an ECS per second on the hypervisor.

    Total number of outband incoming bytes on an ECS/Monitoring period

    This metric is unavailable if SR-IOV is enabled.

    Outband Outgoing Rate

    Indicates the number of outgoing bytes on an ECS per second on the hypervisor.

    Total number of outband outgoing bytes on an ECS/Monitoring period

    This metric is unavailable if SR-IOV is enabled.

    System Status Check Failed

    Indicates the status of the cloud platform for running ECSs. The check result is 0 or 1.

    • 0: The system is running properly. All check items are normal.
    • 1: The system is not running properly. At least one check item failed.

    The system periodically checks the status and returns check results using value 0 or 1.

    • If the detected fault does not affect ECS functions, certain management operations performed on the ECS, such as starting, stopping, or specifications modifications, may be affected.
    • If the detected fault affects ECS functions, such as a host power supply failure, the system will recover the ECS as soon as possible.

    When the power source of the physical host fails or the hardware/software becomes faulty, the check result is 1.

    InfiniBand NIC status

    Indicates the status of an InfiniBand NIC on an H2 ECS.

    NOTE:

    Only Mellanox EDR 100 GB single-port InfiniBand NICs are supported.

    The system periodically checks the status and returns check results using value 0 or 1.

    • 0: The system is running properly. That is, the InfiniBand NIC is functional.
    • 1: The system is not running properly. That is, the InfiniBand NIC malfunctions.

    When the physical NIC corresponding to a virtual NIC becomes faulty, for example, the network cable is not securely connected to the NIC, the switch or adapter is incompatible with the InifiniBand NIC, or the NIC is disabled, the returned value is 1.

  • Key Management Service (KMS)

    The encryption feature relies on KMS. You can use an encrypted image or EVS disks when creating an ECS. In such a case, you are required to use the key provided by KMS to improve data security.

  • Cloud Trace Service (CTS)

    Allows you to record ECS-related operations for later query, audit, and backtrack.

  • Cloud Server Backup Service (CSBS)

    Protects ECS backups. CSBS backs up all EVS disks of an ECS, including the system disk and data disks, and uses the backup to restore the ECS.