CloudMonitor:Use PCs to detect the network quality of sites

Background information

• For more information about activation and billing of the site monitoring feature, see Activate Network Analysis and Monitoring.

• If your site is configured with high-level firewall policy settings or a whitelist, you may need to add the IP addresses of detection points to the whitelist so that the detection points can successfully access your site without being blocked by the firewall. For more information, see How do I configure a whitelist for a detection request if the detection request is mistakenly identified as an attack or a crawler?

Procedure

1. Log on to the CloudMonitor console.

2. In the left-side navigation pane, choose Network Analysis and Monitoring > Site Monitoring.

3. On the Monitoring Tasks tab, click Create Task.

4. On the Create Task page, select PC and configure the parameters for the site monitoring task. The following table describes the parameters.

   • Basic Information

     • Task Type: HTTP(S)

       Parameter	Description
       Task Name	The name of the site monitoring task. The name must be 4 to 100 characters in length, and can contain letters, digits, and underscores (_).
       Monitored Address	The address of the site that you want to monitor. Valid values: GET (default) POST HEAD The monitored address is a URL. Separate multiple monitored addresses with carriage returns.
       Frequency	The frequency at which the site monitoring task sends detection requests to your site. Valid values: 15 Seconds, 1 Minute, 5 Minutes, 15 Minutes, 30 Minutes, and 60 Minutes. For example, if you select 1 Minute, a detection point in a region sends a detection request to your site every minute. You can customize the monitoring cycle and specify the precise monitoring time. Note If you activated pay-as-you-go CloudMonitor Basic (cms_post) or purchased subscription CloudMonitor Basic (cms_edition) before 22:00:00 on September 13, 2022, you cannot set the Frequency parameter to 15 Seconds. You must activate Network Analysis and Monitoring before you can set the Frequency parameter to 15 Seconds.
       Advanced Settings	For more information about the advanced settings for HTTP or HTTPS, see Advanced settings. Important Handshake protocols earlier than TLS 1.2 have security vulnerabilities. Therefore, CloudMonitor does not support handshake protocols earlier than TLS 1.2 on the server, keeping pace with mainstream browsers. If the error tls: server selected unsupported protocol version 302 occurs on a running site monitoring task but you do not want to upgrade the TLS protocol on the server, you can select the minimum compatible TLS version on the Others tab of the Advanced Settings page.

     • Task Type: PING

       Parameter	Description
       Task Name	The name of the site monitoring task. The name must be 4 to 100 characters in length, and can contain letters, digits, and underscores (_).
       Monitored Address	The address of the site that you want to monitor. The monitored address is a domain name or an IP address. Separate multiple monitored addresses with carriage returns.
       Frequency	The frequency at which the site monitoring task sends detection requests to your site. Valid values: 15 Seconds, 1 Minute, 5 Minutes, 15 Minutes, 30 Minutes, and 60 Minutes. For example, if you select 1 Minute, a detection point in a region sends a detection request to your site every minute. You can customize the monitoring cycle and specify the precise monitoring time. Note If you activated pay-as-you-go CloudMonitor Basic (cms_post) or purchased subscription CloudMonitor Basic (cms_edition) before 22:00:00 on September 13, 2022, you cannot set the Frequency parameter to 15 Seconds. You must activate Network Analysis and Monitoring before you can set the Frequency parameter to 15 Seconds.
       Number of Ping Packets	The number of times that the site is pinged. Default value: 10.

     • Task Type: DNS

       Parameter	Description
       Task Name	The name of the site monitoring task. The name must be 4 to 100 characters in length, and can contain letters, digits, and underscores (_).
       Monitored Address	The address of the site that you want to monitor. The monitored address is a domain name. Separate multiple monitored addresses with carriage returns.
       Frequency	The frequency at which the site monitoring task sends detection requests to your site. Valid values: 15 Seconds, 1 Minute, 5 Minutes, 15 Minutes, 30 Minutes, and 60 Minutes. For example, if you select 1 Minute, a detection point in a region sends a detection request to your site every minute. You can customize the monitoring cycle and specify the precise monitoring time. Note If you activated pay-as-you-go CloudMonitor Basic (cms_post) or purchased subscription CloudMonitor Basic (cms_edition) before 22:00:00 on September 13, 2022, you cannot set the Frequency parameter to 15 Seconds. You must activate Network Analysis and Monitoring before you can set the Frequency parameter to 15 Seconds.
       Type	The type of DNS records that you want to query. Valid values: A (default) MX NS CNAME TXT ANY AAAA
       DNS Access Protocol	The transport layer protocol used by DNS. Valid values: udp (default) tcp tcp-tls
       DNS Server	The type of the DNS server. Valid values: System default DNS The operator DNS corresponding to the detection point Custom DNS
       Number of Retries after DNS Failure	The number of retries after a DNS detection fails.
       Expected Resolution Result	CloudMonitor checks whether the DNS resolution result contains the expected domain names or IP addresses. If the list of expected values is a subset of the list of DNS results, the detection is considered successful. Separate multiple domain names or IP addresses with commas (,).
       Matching Rule	The matching rule for the domain name or IP address.
       Port	The port of the DNS server.

     • Task Type: TCP or UDP

       Parameter	Description
       Task Name	The name of the site monitoring task. The name must be 4 to 100 characters in length, and can contain letters, digits, and underscores (_).
       Monitored Address	The address of the site that you want to monitor. The monitored address is an IP address. Separate multiple monitored addresses with carriage returns.
       Frequency	The frequency at which the site monitoring task sends detection requests to your site. Valid values: 15 Seconds, 1 Minute, 5 Minutes, 15 Minutes, 30 Minutes, and 60 Minutes. For example, if you select 1 Minute, a detection point in a region sends a detection request to your site every minute. You can customize the monitoring cycle and specify the precise monitoring time. Note If you activated pay-as-you-go CloudMonitor Basic (cms_post) or purchased subscription CloudMonitor Basic (cms_edition) before 22:00:00 on September 13, 2022, you cannot set the Frequency parameter to 15 Seconds. You must activate Network Analysis and Monitoring before you can set the Frequency parameter to 15 Seconds.
       Port	The TCP or UDP port number. Default value: 80.
       Advanced Settings	For more information about the advanced settings for TCP or UDP, see Advanced settings.

     • Task Type: SMTP or POP3

       Parameter	Description
       Task Name	The name of the site monitoring task. The name must be 4 to 100 characters in length, and can contain letters, digits, and underscores (_).
       Monitored Address	The address of the site that you want to monitor. The monitored address is a domain name or an IP address. Separate multiple monitored addresses with carriage returns.
       Frequency	The frequency at which the site monitoring task sends detection requests to your site. Valid values: 15 Seconds, 1 Minute, 5 Minutes, 15 Minutes, 30 Minutes, and 60 Minutes. For example, if you select 1 Minute, a detection point in a region sends a detection request to your site every minute. You can customize the monitoring cycle and specify the precise monitoring time. Note If you activated pay-as-you-go CloudMonitor Basic (cms_post) or purchased subscription CloudMonitor Basic (cms_edition) before 22:00:00 on September 13, 2022, you cannot set the Frequency parameter to 15 Seconds. You must activate Network Analysis and Monitoring before you can set the Frequency parameter to 15 Seconds.
       Port	The SMTP or POP3 port number. Default SMTP port number: 25. Default POP3 port number: 110.
       Username	The username and password of the SMTP or POP3 server.
       Password
       Secure Connection	Specifies whether to use secure connections for SMTP or POP3. Valid values: Use Do Not Use

     • Task Type: FTP

       Parameter	Description
       Task Name	The name of the site monitoring task. The name must be 4 to 100 characters in length, and can contain letters, digits, and underscores (_).
       Monitored Address	The address of the site that you want to monitor. The monitored address is a domain name or an IP address. Separate multiple monitored addresses with carriage returns.
       Frequency	The frequency at which the site monitoring task sends detection requests to your site. Valid values: 15 Seconds, 1 Minute, 5 Minutes, 15 Minutes, 30 Minutes, and 60 Minutes. For example, if you select 1 Minute, a detection point in a region sends a detection request to your site every minute. You can customize the monitoring cycle and specify the precise monitoring time. Note If you activated pay-as-you-go CloudMonitor Basic (cms_post) or purchased subscription CloudMonitor Basic (cms_edition) before 22:00:00 on September 13, 2022, you cannot set the Frequency parameter to 15 Seconds. You must activate Network Analysis and Monitoring before you can set the Frequency parameter to 15 Seconds.
       Port	The FTP port number. Default value: 21.
       Anonymous Logon	Anonymous Logon (default) Authentication Required If you select the Authentication Required option, you must specify the username and password of the FTP server.
       Username	The username and password of the FTP server.
       Password

   • Define Assertions

     If you set the Task Type parameter to HTTP(S), you can use the assertion feature to specify conditions based on the response that is returned by a detection and check whether the expected result is returned. You can configure multiple assertions by specifying conditions. A detection point is available only if it meets all the specified conditions.

     Note

     If you do not configure a status code assertion for HTTP detections, status codes that are less than 400 are available by default.

     CloudMonitor provides an available condition by default. If the default condition does not meet your business requirements, perform the following steps to add conditions:

     1. Click Add Condition Group.

     2. Configure the condition of the assertion.

        • Response Time (ms): checks whether the response time meets expectations. Default setting: less than 1,000 ms.

          Note

          The response time includes the DNS resolution time.

        • Status Code: checks whether the response status code meets expectations. Default status code: less than 400.

        • Header: checks whether the fields in the response header meet expectations. You must configure a custom condition for the response header assertion.

        • Body, XML Field of Body, and JSON Field of Body: check whether the content in the response body meets expectations by using text matching, XML parsing (XPath), and JSON parsing (JSONPath). For more information, see XPath Syntax and JSON with JSONPath.

     3. Click Verify.

        You can view the verification result on the right side of the page.

        • If the verification result is Successful, you can create a site monitoring task as expected.

        • If the verification result is Failed, you can perform network diagnostics at the corresponding detection point.

     If responses that do not meet the conditions are detected, you can initiate PING and MTR detections at the corresponding detection points.

     Note

     MTR is a network diagnostic tool that integrates PING and Traceroute features.

   • Select Detection Points

     Parameter	Description
     IP Protocol	The type of the IP address that is used by the site monitoring task. Valid values: IPv4, IPv6, IDC, and LastMile.
     Select detection points	The default detection points and custom detection points that are used for site monitoring. If the default detection points do not meet your business requirements, perform the following steps to add custom detection points: Click Manage custom templates. In the Detection Point Templates panel, click Create Template. In the Create/Modify Detection Point Template dialog box, enter a custom template name in the Template Name field and select the custom detection points that you want to use. Click OK. Click OK.

   • Configure Alert Rules

     CloudMonitor provides an alert rule by default. If the default rule does not meet your business requirements, perform the following steps to add an alert rule:

     1. Click Add Rule.

     2. In the Add Rule Description panel, configure parameters for the alert rule. The following table describes the parameters.

        Parameter	Description
        Rule Name	The name of the alert rule.
        Metric Name	The name of the metric that is used by the alert rule. Valid values: Percentage of Available Detection Points Percentage of available detection points = (Number of times that a domain name or IP address can be accessed properly within a monitoring period/Total number of detection requests) × 100%. Number of Unavailable Detection Points This metric specifies the number of times that the domain name or IP address of the site cannot be accessed as expected within a monitoring period. Number of Available Detection Points This metric specifies the number of times that the domain name or IP address of the site can be accessed as expected within a monitoring period. Any Status Code (Independent Alert) If the status code that is returned by one of the detection points meets the specified condition, an alert is triggered. All Status Codes (Combined Alert) If the status codes that are returned by all detection points meet the specified condition, an alert is triggered. Response Time
        Comparison	The operator that is used to compare the metric value with the threshold in the alert rule. Valid values: >= > <= < = != Compared With Yesterday Rise Compared With Yesterday Decline Compared With Last Week Rise Compared With Last Week Decline Compared With Last Period Rise Compared With Last Period Decline
        Threshold and Alert Level	The alert level and the corresponding threshold. The notification method for alerts of the Info level is Email + Webhook. Valid values of the number of consecutive periods in which the metric value reaches the threshold before an alert is triggered: 1, 2, 3, 4, 5, 10, 15, and 20.
        Tag	The tags of the alert rule.
        Auto Scaling	If you turn on Auto Scaling, the specified scaling rule is enabled when an alert is triggered. In this case, you must configure the Region, ESS Group, and ESS Rule parameters. For more information about how to create a scaling group, see Manage scaling groups. For more information about how to create a scaling rule, see Manage scaling rules.
        Simple Log Service	If you turn on Simple Log Service, the alert information is sent to the specified Logstore when an alert is triggered. In this case, you must configure the Region, ProjectName, and Logstore parameters. For more information about how to create a project and a Logstore, see Getting Started.
        Simple Message Queue (formerly MNS) - Topic	If you turn on Simple Message Queue (formerly MNS) - Topic, the alert information is sent to the specified topic in Simple Message Queue (formerly MNS) (SMQ) when an alert is triggered. In this case, you must configure the Region and topicName parameters. For more information about how to create a topic, see Create a topic.
        Function Compute	If you turn on Function Compute, an alert notification is sent to Function Compute for format processing when an alert is triggered. In this case, you must configure the Region, Service, and Function parameters. For more information about how to create a service and a function, see Quickly create a function.

     3. Click OK.

   • Select Alert Contact Groups

     Parameter	Description
     Contact Groups	The alert contact groups to which alert notifications are sent. Select at least one alert contact group. Alert notifications are sent to the alert contacts that belong to the specified alert contact groups. An alert contact group can contain one or more alert contacts.
     Mute For	The interval at which CloudMonitor resends alert notifications before an alert is cleared. Valid values: 5 Minutes, 15 Minutes, 30 Minutes, 60 Minutes, 3 Hours, 6 Hours, 12 Hours, and 24 Hours. If a metric value reaches the threshold, CloudMonitor sends an alert notification. If the metric value reaches the threshold again within the mute period, CloudMonitor does not resend an alert notification. If the alert is not cleared after the mute period ends, CloudMonitor resends an alert notification. Note You can click Advanced Settings to configure this parameter.
     Effective Period	The period during which the alert rule is effective. CloudMonitor monitors the specified resources based on the alert rule only within the specified period. Note You can click Advanced Settings to configure this parameter.
     Alert Callback	The callback URL that can be accessed over the Internet. CloudMonitor sends HTTP POST requests to push alert notifications to the specified URL. Only HTTP requests are supported. For more information about how to configure alert callback, see Use the alert callback feature to send notifications about threshold-triggered alerts. To test the connectivity of an alert callback URL, perform the following steps: Click Test next to the callback URL. In the Webhook Test panel, you can check and troubleshoot the connectivity of the alert callback URL based on the returned status code and test result details. Note To obtain the details of the test result, configure the Test Template Type and Language parameters and click Test. Click Close. Note You can click Advanced Settings to configure this parameter.

5. Click Create.

What to do next

References

• Use mobile devices to detect the network quality of sites

• IP address pools of detection points for site monitoring

• Error codes and status codes

• Metrics

Advanced settings