By monitoring several metrics, specifically disk usage, inbound and outbound bandwidth and QPS, CloudMonitor helps you understand the status of your instances in HybridDB for MySQL scaling groups and set alarm rules accordingly. CloudMonitor automatically collects data from HybridDB for MySQL from the time when you begin to use this product.

Monitoring service

  • Metrics
    Metric Dimensions Unit Minimum monitoring frequency
    Disk usage User and instance byte 5 minutes
    Inbound bandwidth User and instance byte/s 5 minutes
    Outbound bandwidth User and instance byte/s 5 minutes
    QPS User and instance count/s 5 minutes
    Note
    • Monitoring data is saved for up to 31 days.
    • You can view up to 14 consecutive days of monitoring data.
  • View monitoring data.
    1. Log on to the CloudMonitor Console.
    2. Go to the HybridDB for MySQL instance list under Cloud Service Monitoring.
    3. Click an instance name or click Monitoring Chart in the Actions column to access the instance monitoring details page and view various metrics.
    4. Click the Time Range toggle button from the upper menu of the page or use the precise selection function. You can view monitoring data from up to 14 consecutive days.
    5. Click Zoom In in the upper-right corner of the monitoring chart to enlarge the chart.

Alarm service

  • Set an alarm rule.
    1. Log on to the CloudMonitor Console.
    2. Go to the HybridDB for MySQL instance list under Cloud Service Monitoring.  
    3. Click an instance name or click Monitoring Chart in the Actions column to access the instance monitoring details page.
    4. Click the bell icon or New Alarm Rule in the upper-right corner of the monitoring data page to set an alarm rule for corresponding metrics of this instance.
  • Set multiple alarm rules.
    1. Log on to the CloudMonitor Console.
    2. Go to the HybridDB for MySQL instance list under Cloud Service Monitoring.  
    3. Select the appropriate instances on the instance list page. Click Set Alarm Rules to add multiple alarm rules.
  • Parameters
    • Products: ECS, RDS, OSS, among others
    • Resource Range: the range for which an alarm rule takes effect. There are two alarm rule ranges available: All Resources and Instances.
      • All Resources: Indicates that the specified alarm rule applies to all HybridDB for MySQL instances under your name. For example, if you set the resource range to all resources, and set the alarm threshold for CPU usage to 80%, then an alarm is triggered when the CPU usage of any HybridDB for MySQL instance exceeds 80%. When you select All Resources, you can report alarms for up to 1,000 resources. If the number of your resources exceeds 1,000, alarms cannot be reported for some resources even if they exceed the threshold you set in your alarm rule. Therefore, for these scenarios, we recommend that you use application groups to divide resources by service before setting up alarm rules to avoid this issue.
      • Instances: Indicates that the specified rule only applies to a specific instance. For example, if you set the resource range to Instances and set the alarm threshold for CPU usage to 80%, an alarm is triggered when the CPU usage of the specified instance exceeds 80%.
    • Alarm Rule: the alarm rule name
    • Rule Describe: the main content of the alarm rule where you define the alarm-triggering conditions, or value threshold, for related metrics. For example, if you describe the rule as 60mins Average CPU Usage >= 1GB, the alarm service will check every five minutes whether the average value of CPU usage within 60 minutes meets or exceeds 1 GB.

      Consider the following example. For the alarm service in host monitoring, one data point is reported in 15 seconds for a single server metric, and 20 data points in five minutes. This relates to the following alarm rules.

      • 5mins Average CPU Usage > 90%: The average CPU usage value of the 20 data points in five minutes exceeds 90%.
      • 5mins CPU Usage Always > 90%: The CPU usage values of the 20 data points in five minutes all exceed 90%.
      • 5mins CPU Usage Once > 90%: The CPU usage value of at least one of the 20 data points in five minutes exceeds 90%.
      • Total 5mins Internet Outbound Traffic > 50 MB: The sum of the outbound traffic values of the 20 data points in five minutes exceeds 50 MB.
    • Mute For: the period of time that an alarm is muted so that alarm contacts do not receive any alarm notifications during this period. An alarm rule can be muted for up to 24 hours (or 1 day).
    • Triggered when threshold is exceeded for: An alarm notification is sent if the detected values reach the alarm rule threshold a certain number of times consecutively.
    • Effective Period: the period of time for which an alarm rule is effective. During this period of time, the alarm service checks metric data and determines whether to generate an alarm.
    • Notification Contact: a group of contacts who receive alarm notifications.
    • Notification Methods: Emails and DingTalk chatbot.
    • Email Subject: The email subject is set as the product name, metric, and instance ID involved in the alarm by default.
    • Email Remark: supplementary information customized for an alarm email. Remarks are sent as part of the alarm notification email body.
    • HTTP CallBack: Enter a URL accessible through the Internet and CloudMonitor will push the alarm information to the address through a POST request. Currently, only HTTP is supported.