FAQs - support.huaweicloud.com · Debian 7.5.0, 8.2.0, 8.8.0, 9.0.0 Ubuntu 14.04 server, 16.04 server EulerOS 2.2 SUSE Enterprise11 SP4, Enterprise12 SP1, Enterprise12 SP2 Fedora

Cloud Eye

FAQs

Issue 01

Date 2020-03-17

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without priorwritten consent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respectiveholders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei andthe customer. All or part of the products, services and features described in this document may not bewithin the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,information, and recommendations in this document are provided "AS IS" without warranties, guaranteesor representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: https://www.huawei.com

Email: [email protected]

Issue 01 (2020-03-17) Copyright © Huawei Technologies Co., Ltd. i

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Contents

1 Concepts.................................................................................................................................... 11.1 What Is Cloud Eye?................................................................................................................................................................. 11.2 What Alarm Status Does Cloud Eye Support?.............................................................................................................. 11.3 Which Alarm Severities Are Supported by Cloud Eye?...............................................................................................11.4 What Is Rollup?........................................................................................................................................................................ 21.5 How Long Is the Metric Data Retained?......................................................................................................................... 21.6 How Many Rollup Methods Does Cloud Eye Support?.............................................................................................. 31.7 What OSs Does the Agent Support?................................................................................................................................ 31.8 How Do I Upgrade the Agent?........................................................................................................................................... 51.9 Why Is the Metric Collection Point Lost During Certain Period of Time?........................................................... 5

2 Usages........................................................................................................................................ 72.1 What Is an Alarm Notification? How Many Types of Alarm Notifications Does Cloud Eye Support?How Can I Configure Them?...................................................................................................................................................... 72.2 Why Are the Network Traffic Metrics in Cloud Eye Different from Those Detected in ECS?.......................72.3 What Are the Effects on ECS Metrics If VM Tools Is Not Installed on ECSs?..................................................... 82.4 Why Is the Monitoring Data Not Displayed on the Cloud Eye Console?............................................................ 82.5 How Can I Export Monitoring Data?................................................................................................................................ 82.6 Under What Circumstances Will an Alarm Rule Trigger "Insufficient data"?.................................................... 92.7 How Do I Handle the Garbled CSV File If I Open It with Excel?............................................................................ 92.8 Why I Cannot See the Monitoring Data on the Cloud Eye Console After Purchasing Cloud ServiceResources?......................................................................................................................................................................................... 92.9 How Can I Ensure the Newly Purchased ECS Has the OS Monitoring Function?.......................................... 102.10 Why the Cloud Eye Console Does Not Display the OS Monitoring Data or the Data Display Is LaggedAfter Agent Is Installed and Configured on ECS?............................................................................................................. 122.11 What Should I Do If Agent Status Is Faulty?............................................................................................................ 132.12 Restoring Agent Configurations.................................................................................................................................... 132.13 How Do I Query the Current Agent Version?........................................................................................................... 132.14 How Can I Create an Agency?....................................................................................................................................... 142.15 What Can I Do If the Agency Has Expired?...............................................................................................................162.16 What Should I Do If the IAM Account Permission Is Abnormal?...................................................................... 162.17 What Can I Do If I Cannot Create an Agency?........................................................................................................ 172.18 What Should I Do If the Agency Is Used by Other Cloud Services?................................................................. 172.19 What Should I Do If the Service Port Is Used by the Agent?.............................................................................. 172.20 How to Change the DNS Server Address and Add Security Group Rules?.....................................................18

Cloud EyeFAQs Contents

Issue 01 (2020-03-17) Copyright © Huawei Technologies Co., Ltd. ii

2.21 Why Is the Basic Monitoring Data Inconsistent with the OS Monitoring Data?......................................... 202.22 Why a BMS Is Displayed in the ECS List on the Server Monitoring Page After the Agent Is Installedon the BMS?...................................................................................................................................................................................212.23 What Should I Do If the Monitoring Period Is Interrupted or the Agent Status Frequently Changes?............................................................................................................................................................................................................ 212.24 How Many Statuses Does the Agent Have?............................................................................................................. 232.25 How Do I Change the Phone Number and Email Address for Receiving Alarm Notifications?..............242.26 How Can a Sub Account Receive Alarm Notifications?........................................................................................ 252.27 Why Do I Receive a Bandwidth Overflow Alarm Notification But No Overspeed Record Is Available inthe Monitoring Data?................................................................................................................................................................. 252.28 Why Are the Memory Usage and Disk Usage Metrics Not Available for My ECS?.....................................252.29 How Do I Enable the Data Disk Usage Alarm Notification?...............................................................................25

Cloud EyeFAQs Contents

Issue 01 (2020-03-17) Copyright © Huawei Technologies Co., Ltd. iii

1 Concepts1.1 What Is Cloud Eye?

Cloud Eye is a multi-dimensional monitoring platform. You can use Cloud Eye tomonitor the utilization of service resources, track the running status of cloudservices, configure alarm rules and notifications, and quickly respond to resourcechanges.

1.2 What Alarm Status Does Cloud Eye Support?Cloud Eye supports three alarm status: Alarm, OK, and Insufficient data.

● If an alarm rule is disabled, its alarm status is considered as invalid, andDisabled is displayed.

● Insufficient data indicates that no monitoring data is reported for threeconsecutive hours because the corresponding service instance is deleted or theinstance status is abnormal.

● Alarm indicates that the monitoring data meets the preset alarm policy.● OK indicates that the monitoring data is reported normally and does not

meet the preset alarm policy.

1.3 Which Alarm Severities Are Supported by CloudEye?

Alarm severities are classified into four levels: critical, major, minor, andinformational. You can set alarm severities of alarm rules as required.

● Critical: An emergency fault occurs in the resource corresponding to thealarm rule and services are affected.

● Major: A relatively serious problem that affects services occurs in the resourcecorresponding to the alarm rule and may hinder the normal use of theresource.

Cloud EyeFAQs 1 Concepts

Issue 01 (2020-03-17) Copyright © Huawei Technologies Co., Ltd. 1

● Minor: A less serious problem occurs in the resource corresponding to thealarm rule and will not hinder the normal use of the resource.

● Informational: A potential error exists in the resources corresponding to thealarm rule and may affect the services.

1.4 What Is Rollup?Rollup is the process in which Cloud Eye calculates sample raw data collected indifferent periods by using different rollup methods, including Avg., Max., Min.,Sum, and Variance. The calculation period is called rollup period.

Rollup is a smooth calculation process. The longer the rollup interval, the moresmoothly processing will be implemented, and the more accurate these generateddata will reflect the real situation. However, the shorter the rollup interval is, themore effective alarm reporting will be.

The rollup period can be 5 minutes, 20 minutes, 1 hour, 4 hours, or 1 day.

The methods Cloud Eye uses to process collected data vary depending on datatype:

● If the data is an integer, the data will be rounded.● If the data is a decimal fraction, two decimal places will be retained. Any

further decimal places will be rounded.

For example, the instance quantity in AS is an integer. If the rollup period is 5minutes, the values of collected metric data are 1 and 4, while the average valueis 2 instead of 2.5.

You can choose the proper rollup method to meet your service requirements.

1.5 How Long Is the Metric Data Retained?Metric data includes raw and rolled-up data.

● Raw data is sampled raw data and is retained for two days.● Rolled-up data is data aggregated based on raw data. The retention time for

rolled-up data depends on the rollup period:– Rollup period of 5 minutes: data retained for 10 days– Rollup period of 20 minutes: data retained for 20 days– Rollup period of 1 hour: data retained for 155 days– Rollup period of 4 hours: data retained for 300 days– Rollup period of 24 hours: data retained for 5 years

If a resource is stopped, closed, or deleted, the original metric will be deleted onehour after its raw data is not reported. After the metric data report resumes, thehistorical data of that metric is available.



1.6 How Many Rollup Methods Does Cloud EyeSupport?

Cloud Eye supports the following rollup methods:

● AverageIf Avg. is selected for Statistic, Cloud Eye calculates the average value ofmetric data within a rollup period.

● MaximumIf Max. is selected for Statistic, Cloud Eye calculates the maximum value ofmetric data within a rollup period.

● MinimumIf Min. is selected for Statistic, Cloud Eye calculates the minimum value ofmetric data within a rollup period.

● SumIf Sum is selected for Statistic, Cloud Eye calculates the sum of metric datawithin a rollup period.

● VarianceIf Variance is selected for Statistic, Cloud Eye calculates the variance value ofmetric data within a rollup period.

Rollup uses a rollup method to aggregate raw data generated within a specific period.Take the 5-minute period as an example. If it is 10:35 now, the raw data generatedbetween 10:30 and 10:35 will be aggregated to 10:30.

1.7 What OSs Does the Agent Support?The following table lists OSs compatible with Agent. OSs not included in the tableare being tested.

NO TICE

Using OSs or versions that have not been verified may adversely affect yourservices. Exercise caution when using them.

Table 1-1 and Table 1-2 list the available OSs.

Table 1-1 System version (ECS)

Available OS(64 bit)

Version

CentOS 6.3, 6.5, 6.8, 6.9, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6

OpenSUSE 13.2, 42.2



Available OS(64 bit)

Version

Debian 7.5.0, 8.2.0, 8.8.0, 9.0.0

Ubuntu 14.04 server, 16.04 server

EulerOS 2.2

SUSE Enterprise11 SP4, Enterprise12 SP1, Enterprise12 SP2

Fedora 24, 25

Oracle Linux 6.9, 7.4

CoreOS 10.10.5NOTE

Cloud-Init cannot be automatically installed. The manual installationdirectory is /.To query the Agent status, run the following command: systemctltelescoped status.

Other Gentoo Linux 13.0, Gentoo Linux 17.0NOTE

To query the Agent status, run the following command: rc-servicetelescoped status.

Windows Windows Server 2016 Standard 64bit EnglishWindows Server 2016 Standard 64bit ChineseWindows Server 2016 Datacenter 64bit EnglishWindows Server 2016 Datacenter 64bit ChineseWindows Server 2012 R2 Standard 64bit EnglishWindows Server 2012 R2 Standard 64bit ChineseWindows Server 2012 R2 Datacenter 64bit EnglishWindows Server 2012 R2 Datacenter 64bit ChineseWindows Server 2008 R2 Standard 64bit EnglishWindows Server 2008 R2 Standard 64bit ChineseWindows Server 2008 R2 Datacenter 64bit ChineseWindows Server 2008 R2 Enterprise 64bit EnglishWindows Server 2008 R2 Enterprise 64bit ChineseWindows Server 2008 WEB R2 64bit Chinese

ARMgeneral-computing

CentOS 7.4 64bit with ARM(40GB)CentOS 7.5 64bit with ARM(40GB)CentOS 7.6 64bit with ARM(40GB)EulerOS 2.8 64bit with ARM(40GB)Fedora 29 64bit with ARM(40GB)Ubuntu 18.04 64bit with ARM(40GB)



Table 1-2 System version (BMS)

Available OS (64 bit) Version

SUSE Enterprise11 SP4

CentOS 6.9, 7.2, and 7.3

The GPU plug-in supports only EulerOS 2.2, Ubuntu 14.04 server, and CentOS 7.3.

1.8 How Do I Upgrade the Agent?Agents of different versions provided by Cloud Eye have different metrics orfunctions. You can manually or automatically upgrade the Agent. The differencesbetween the two modes are as follows:● (Recommended) Automatic upgrade: Complex steps involved in the manual

upgrade are saved. After the Agent is updated, the automatic upgrade isautomatically performed to enable you to experience the new functions in thefirst time.

● Manual upgrade: In manual mode, you need to uninstall the Agent andreinstall it.– Linux OS: Log in to the ECS as user root and run the /usr/local/

telescope/uninstall.sh command to uninstall the Agent. Reinstall thenew version according to Agent Installation and Configuration

– Windows OS: In the directory where the Agent installation package of theearlier version is stored, double-click the uninstall.bat script to uninstallthe Agent. In the directory where the Agent installation package of thenew version is stored, double-click install.bat to install and start theAgent.

1.9 Why Is the Metric Collection Point Lost DuringCertain Period of Time?

Figure 1-1 shows that no monitoring data is available during certain period oftime.



https://support.huaweicloud.com/intl/en-us/usermanual-ces/ces_01_0027.html

Figure 1-1 Viewing graphs

This phenomenon is not a function or design defect. The Agent collects metricsbased on the server time. When the server time changes (time change caused bytime synchronization), the illusion of metric collection point loss is displayed,actually, the metric collection point is not lost.



2 Usages2.1 What Is an Alarm Notification? How Many Types ofAlarm Notifications Does Cloud Eye Support? How CanI Configure Them?

Alarm notifications are actions that the system takes when the alarm status of analarm rule is changed.

You can configure alarm notifications when creating or modifying an alarm rule.You can also disable alarm notifications.

Cloud Eye supports the following alarm notification types:

● Sends emails to users, or sends HTTP/HTTPS requests to servers.● Triggers automatic capacity expansion and reduction by working with AS.

2.2 Why Are the Network Traffic Metrics in Cloud EyeDifferent from Those Detected in ECS?

The sample data collection interval in Cloud Eye is different from that used by themetric monitoring tool in the ECS.

Cloud Eye collects ECS and EVS data at four-minute intervals. The data collectioninterval for ECS second generation is 5 minutes. However, the metric monitoringtool in the ECS collects data at one-second intervals.

As the data collection cycle gets longer, the distortion of short time data increases.Therefore, Cloud Eye is suitable for monitoring long-term websites andapplications running on ECSs.

Furthermore, you can configure alarm thresholds to generate alarms in the eventof resource exceptions or insufficiency, improving resource reliability.

Cloud EyeFAQs 2 Usages


2.3 What Are the Effects on ECS Metrics If VM Tools IsNot Installed on ECSs?

If VM Tools is not installed on ECSs, Cloud Eye can still monitor the outbandincoming rate and outband outgoing rate. However, it cannot monitor memoryusage, disk usage, inband incoming rate, or inband outgoing rate, which reducesdata accuracy of the CPU usage.

For details about ECS metrics supported by Cloud Eye, see Basic ECS Metrics.

2.4 Why Is the Monitoring Data Not Displayed on theCloud Eye Console?

Possible causes are as follows:

● The ECS or BMS has been stopped for more than 1 hour.● The EVS disk is not attached to an ECS or a BMS.● No backend server is bound to the elastic load balancer or all backend servers

are shut down.● It is less than 10 minutes after a resource is purchased.

2.5 How Can I Export Monitoring Data?1. On the console, choose Cloud Service Monitoring or Server Monitoring.2. Click Export Data.3. Set the time range, resource type, dimension, monitored object, and metric.4. Click Export.

You can export data of multiple metrics at a time.

● The first row in the exported monitoring report displays the user name, regionname, service name, instance name, instance ID, metric name, monitoringdata, time, and timestamp. This report enables users to view historicalmonitoring data.

● If you need to convert the time in Unix timestamp to the time of the targettime zone, perform the following steps:

a. Use Excel to open a .csv file.b. Use the following formula to convert the time:

Target time = (Unix timestamp/1000 + (Target time zone) x 3600)/86400+ 70 x 365 + 19

c. Set cell format to Date.For example, the Unix timestamp is 1475918112000 and the target timeis Beijing time. Beijing is located in the UTC+8 time zone. Therefore, thetarget time is calculated as follows:



https://support.huaweicloud.com/intl/en-us/usermanual-ecs/ecs_03_1002.html

Target time = (1475918112000/1000 + (+8) x 3600)/86400 + 70 x 365+ 19Set the cell format to date and select a presentation format such as2016/3/14 13:30. Then, the final time is obtained and presented as2016/10/8 17:15.

2.6 Under What Circumstances Will an Alarm RuleTrigger "Insufficient data"?

When the monitoring data of a metric is not reported to Cloud Eye for threeconsecutive hours, the alarm rule status changes to Insufficient data. In this case,if you click Insufficient data for Trigger condition when creating the alarm rule,the system will send an email or a text message to you in a timely manner, so thatyou can locate problems promptly. The system can also send HTTP or HTTPSrequests to the server.

In special cases, if the period for reporting monitoring data is greater than threehours and for three consecutive periods the monitoring data is not reported, thealarm rule status changes to Insufficient data.

2.7 How Do I Handle the Garbled CSV File If I Open Itwith Excel?

You can export the Cloud Eye monitoring data as a CSV file, but when you openthis file with Excel, there may be garbled Chinese characters. This is because theexported CSV file is encoded in UTF-8 while Excel is opened in the ANSI format. Tosolve this problem, use either of the following solutions:

● Use a text editor such as NotePad or use WPS to open the exported CSV file.● When you open the CSV file, set Excel as follows:

1. Create an EXCEL file.2. Choose Data > From Text.3. Select the exported monitoring data file in CSV format and click Import.

The Text Import Wizard dialog box is displayed.4. Select Delimited and click Next.5. Deselect Tab, select Comma, and click Next.6. Click Finish.7. In the Import Data dialog box, click OK.

2.8 Why I Cannot See the Monitoring Data on theCloud Eye Console After Purchasing Cloud ServiceResources?

We are working to interconnect Cloud Eye with more cloud services. Before theinterconnection is completed, you cannot view the resource monitoring data of the



cloud services that have not been interconnected with Cloud Eye. Therefore, if youwant to check the resource monitoring data of the cloud services you purchased,you need to first check whether the cloud services have been interconnected withCloud Eye.

If the services have been interconnected with Cloud Eye, wait for a period of time,because the frequencies of each service to collect and report data to Cloud Eye aredifferent. You can view the resource monitoring graph after Cloud Eye collects thefirst piece of monitoring data.

2.9 How Can I Ensure the Newly Purchased ECS Has theOS Monitoring Function?

Scenarios

This topic describes how to enable the newly purchased ECS coming with the OSMonitoring function.

The created private image cannot be used across regions. If the private image is used acrossregions, no monitoring data is available.

Prerequisites

The ECS has the Agent installed is available.

Procedure1. Log in to the ECS console. On the ECS list, locate the row containing the ECS

with the Agent installed, and choose More > Stop in the Operation column.

Figure 2-1 Stop

2. Choose More > Create Image.



Figure 2-2 Create Image

3. Set the private image name to Image_with_agent and click Next.

Figure 2-3 Image_with_agent

4. Purchase a new ECS and select the newly created private imageImage_with_agent.



Figure 2-4 Image_with_agent(40GB)

5. After the new ECS is created, log in to the ECS. Change InstanceId in theAgent configuration file /usr/local/telescope/bin/conf.json to the ECS nameto complete the replication process.

Figure 2-5 Modifying the Agent configuration file

2.10 Why the Cloud Eye Console Does Not Display theOS Monitoring Data or the Data Display Is LaggedAfter Agent Is Installed and Configured on ECS?

After installing the Agent successfully, you need to choose Server Monitoring,enable the ECS Monitoring Status, and wait for 2 minutes. Then the OSMonitoring data will be displayed on the Cloud Eye console.

If Agent Status is Running and Monitoring Status is enabled, but no OSMonitoring data is displayed after you have waited for 5 minutes, you need tocheck whether the ECS time and the console client time are consistent.

When the Agent reports data, it takes the ECS or BMS local time. When theconsole delivers requests, it takes the browser time of the user client. If the twotimes are inconsistent, no OS Monitoring data is displayed on the Cloud Eyeconsole.

Run the following command to change the BMS time to be the same as that of themonitoring server: timedatectl set-timezone 'Asia/Shanghai'



2.11 What Should I Do If Agent Status Is Faulty?OS Monitoring sends a heartbeat message to Cloud Eye every 1 minute. If CloudEye cannot receive a heartbeat for 3 minutes, Agent Status is displayed as Faulty.

Possible causes are:

1. The Agent is incorrectly configured. For details, see (Optional) ManuallyConfiguring the Agent for Linux in the Cloud Eye User Guide.

2. Locate the cause in log /usr/local/telescope/log/common.log.

2.12 Restoring Agent ConfigurationsAfter the Agent is installed, you can configure AK/SK, RegionID, and ProjectId inone-click mode. This saves manual configuration and improves configurationefficiency.

Alternatively, on the Server Monitoring page, select the target ECS and clickRestore Agent Configurations. In the displayed Restore Agent Configurationsdialog box, click One-Click Restore.

2.13 How Do I Query the Current Agent Version?You can log in to the management console to query the Agent version of thecurrent ECS. The procedure is as follows:

1. Log in to the management console.

2. Click in the upper left to select a region and a project.3. Under Management & Deployment, select Cloud Eye.

The Cloud Eye console is displayed.4. In the navigation pane on the left, choose Server Monitoring.

The Server Monitoring page is displayed.5. Locate the row containing the target ECS. In the Operation column, click

More, and choose Modify Upgrade Method.

You can modify the Agent upgrade method only for ECSs whose Agent Status isRunning.

6. In the displayed Modify Upgrade Method dialog box, check the value ofCurrent Version.For example, if Current Version is 1.1.4, the version of the Agent installed onthe current ECS is 1.1.4.



https://support.huaweicloud.com/intl/en-us/usermanual-ces/ces_01_0031.htmlhttps://support.huaweicloud.com/intl/en-us/usermanual-ces/ces_01_0031.html

2.14 How Can I Create an Agency?

ScenariosThis topic describes how to enable Telescope to automatically obtain the AK andSK by creating an agency. This frees you from exposing the AK or SK in theconfiguration file.

Procedure1. Log in to the management console.

2. Click in the upper left to select a region and a project.3. Under Management & Deployment, select Identity and Access

Management.4. Choose Agency > Create Agency.5. Configure the parameters required for creating an agency.

Table 2-1 Creating an agency

Name Description

Agency Name Specifies the name of the agency.Example: CESAgentAutoConfigAgency

Agency Type Select Cloud service.

Cloud Service Select ECS.

Validity Period Select Permanent.

Description Specifies the detailed information about the agency. Thisparameter is optional.

6. In the Permissions area, click Modify in the row where the current region is

located. The Policy page is displayed.7. In the Available Policies area on the left, enter CES. In the search result,

select CES and CES Administrator.

In the Available Policies area on the left, enter LTS. In the search result, select LTSand LTS Administrator.



Figure 2-6 Policy

8. Click OK in the lower part of the page.

If no agency is configured for the server, perform the following operationsto configure the agency:

1. Log in to the management console.2. Under Computing, select Elastic Cloud Server.

If you purchase a BMS, click Bare Metal Server under Computing.

3. Click the name of the target ECS on which the Agent is installed.4. For Agency Name, select the agency name created in 2.14 How Can I Create

an Agency? and click the green icon to confirm your selection.

Figure 2-7 Selecting an agency name (ECS)



Figure 2-8 Selecting an agency name (BMS)

2.15 What Can I Do If the Agency Has Expired?If the current agency expires, the entrusted time has expired and cannot be used.You can change the entrusted time to permanent based on 2.14 How Can ICreate an Agency?

2.16 What Should I Do If the IAM Account PermissionIs Abnormal?

A user in a user group must have the Security Administrator permission. If no, amessage indicating that the permission is abnormal is displayed. Contact theadministrator to change the permission.

Figure 2-9 Checking the permissions



2.17 What Can I Do If I Cannot Create an Agency?If the agency quota is full during the Agent configuration restoration, you cannotcreate an agency. You can delete invalid agencies or expand the agency quota torestore the Agent configuration again.

2.18 What Should I Do If the Agency Is Used by OtherCloud Services?

When the Agent configuration is restored, an agency whose name isCESAgentAutoConfigAgency is automatically created. If you have created suchan agency but ECS or BMS is not selected for Agency Type, the agency may beused by other cloud services.

You can delete the agency and restore the Agent configuration again, or manuallyconfigure the agency based on 2.14 How Can I Create an Agency?

2.19 What Should I Do If the Service Port Is Used bythe Agent?

Cloud Eye Agent uses HTTP requests to report data. Dynamic ports are randomlyoccupied during the reporting. The port range is obtained from the system file: /proc/sys/net/ipv4/ip_local_port_range. If the service port used conflicts with theport used by the Agent, you can modify /proc/sys/net/ipv4/ip_local_port_rangeand restart the Agent to solve the problem.

Procedure1. Log in an ECS or a BMS as user root.2. Run the following command to open the sysctl.conf file:

vim /etc/sysctl.conf3. (Permanent modification) Run the following command to add new port

configurations to the sysctl.conf file:net.ipv4.ip_local_port_range=49152 65536

4. Run the following command to make the modification take effect:sysctl -p /etc/sysctl.conf

● The permanent modification still takes effect after the ECS or BMS is restarted.● For temporary modification (which expires after the ECS or BMS is restarted), run

command # echo 49152 65536 > /proc/sys/net/ipv4/ip_local_port_range.

5. Run the following command to restart the Agent:/usr/local/telescope/telescoped restart

/usr/local/telescope is the Agent installation path.



2.20 How to Change the DNS Server Address and AddSecurity Group Rules?

ScenariosThis topic describes how to add a DNS server address to an ECS or a BMS.

DNS and security group configuration are intended for the primary NIC.

Procedure1. Log in to the ECS or BMS as user root.2. Add the DNS server address to the resolv.conf file.

a. Run the vi /etc/resolv.conf command to open the file.b. Add the DNS server address, for example, nameserver 100.125.1.250 to

the file. Enter :wq. Press Enter to save the setting and close the file.

Figure 2-10 Adding the DNS server address

The value of nameserver varies depending on the region.CN North-Beijing1: 100.125.1.250 and 100.125.21.250CN East-Shanghai2: 100.125.17.29 and 100.125.135.29CN South-Guangzhou: 100.125.1.250 and 100.125.136.29AP-Hong Kong: 100.125.1.250 and 100.125.3.250AP-Bangkok: 100.125.1.250,100.125.3.250

3. On the management console, modify the DNS server address used by thesubnet of the ECS.

a. Click in the upper left to select a region and a project.b. Under Service List, choose Computing > Elastic Cloud Server.

On the ECS console, click the name of the target ECS to view its details.c. Click vpc-ces next to VPC to go to the VPC console.



Figure 2-11 VPC

d. In the VPC list, click vpc-ces.

e. In the subnet list, click Modify in the row where subnet-3e3b are located.

In the displayed Modify Subnet dialog box, change the value of DNSServer Address 1 to 100.125.1.250. An example is shown in Figure 2-12.

● subnet-3e3b is the ECS subnet.

● The IP address of the DNS server must be the same as the value ofnameserver in 2.

Figure 2-12 Modify Subnet

f. Click OK.

The changed DNS server address takes effect after the ECS or BMS is restarted.

4. On the ECS console, modify the security group rules used by the ECS.

a. In the ECS list, select an ECS and click its name. On the displayed ECSdetails page, select the Security Groups tab.

b. Click a security group name and click Modify Security Group Rule in theupper right corner of the security group rules.

c. On the security group details page, choose Outbound Rules > Add Ruleto add rules based on Table 2-2.



Table 2-2 Security group rules

Direction

Protocol Port Destination IPAddress

Description

Outbound

TCP 80 100.125.0.0/16 Used to downloadthe Agentinstallationpackage from theOBS bucket to theECS or BMS andobtain themetadata andauthenticationinformation of theECS or BMS.

Outbound

TCP andUDP

53 100.125.0.0/16 Used by DNS toresolve domainnames, forexample, resolvethe OBS domainname when usersare downloadingthe Agentinstallationpackage, andresolve the CloudEye endpoint whenthe Agent issendingmonitoring data toCloud Eye.

Outbound

TCP 443 100.125.0.0/16 Used to collectmonitoring data toCloud Eye.

2.21 Why Is the Basic Monitoring Data Inconsistentwith the OS Monitoring Data?

Symptom

CPU Usage under Basic Monitoring is greater than 90% and is close to 100%,which is greatly different from that under OS Monitoring.

Causes1. If you set idle to poll in the guest operating system (guestOS), and the

guestOS is idle and enters the polling state, it consumes computing resources



and does not proactively release CPU resources. As a result, the CPU usage isabnormal.

2. In the HANA instance, idle is set to mwait in the guestOS. When the guestOSis idle and enters the mwait status, the guestOS consumes less resourcesthan that when idle is set to poll. However, the guestOS does not proactivelyrelease CPU resources, too. As a result, the CPU usage is abnormal.

Solution

To view more accurate monitoring data, you are advised to install the Agent toview OS monitoring data.

2.22 Why a BMS Is Displayed in the ECS List on theServer Monitoring Page After the Agent Is Installed onthe BMS?

Symptom

After the Agent is installed on a BMS, it is listed on the Server Monitoring >Elastic Cloud Server page on the Cloud Eye console.

Possible Causes

The Agent determines whether the server is an ECS or BMS based on the serviceprovided via the IP address 169.254.169.254. If the route of this address ischanged, the Agent will consider the server as an ECS by default.

Solution

Manually modify the Agent configuration file. Add a BMS identifier BmsFlag andset it to true.

● For details about a Linux OS, see (Optional) Manually Configuring theAgent for Linux.

● For details about a Windows OS, see (Optional) Manually Configuring theAgent for Windows.

2.23 What Should I Do If the Monitoring Period IsInterrupted or the Agent Status Frequently Changes?

Symptom

If the following symptoms occur, the Agent is overloaded or is not running stably:

● On the Server Monitoring module on the Cloud Eye console, the Agentstatus changes frequently between Running and Faulty.

● The time period in the monitoring panel is interrupted.



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Possible Causes

To prevent other services from being affected, Cloud Eye uses a fuse mechanismto automatically stop the Agent process once it consumes too many CPU ormemory resources on the server. After the Agent process is stopped, no monitoringdata will be reported.

Principles of the Fuse Mechanism

By default, the Agent detection mechanism is as follows:

Check whether the CPU usage of the Agent process exceeds 30% or the memoryusage exceeds 700 MB every minute, that is, the second threshold. If the CPU ormemory usage exceeds the second threshold, the Agent process exits. If the CPUor memory usage of the Agent process does not exceed the second threshold,check whether it exceeds the first threshold (10% of CPU usages or 200 MB ofmemory usage). If it exceeds the first threshold for three consecutive times, exitthe Agent process and record the information.

After the Agent exit, the daemon process automatically starts the Agent processand checks the exit record. If there are three consecutive exit records, the Agentwill hibernate for 20 minutes, during which monitoring data will not be collected.

When too many disks are attached to a server, the CPU or memory usage of theAgent process will become high. You can configure the first and second thresholdsto trigger the fuse mechanism according to the actual resource usages.

Procedure1. Log in to the ECS or BMS on which the Agent does not report data as user

root.

2. Run the following command to go to the Agent installation path bin:

cd /usr/local/telescope/bin

In a Windows OS, the directory is telescope_windows_amd64\bin.

3. Modify configuration file conf.json.

a. Run the following command to open conf.json:

vi conf.json

b. Add the parameters listed in Table 2-3 to the conf.json file.

Table 2-3 Parameter description

Parameter Description

cpu_first_pct_threshold

Specifies the first threshold for the CPU usage. If theCPU usage of the Agent process is about 20%, youare advised to set this parameter to 35. The unit ispercent (%).



Parameter Description

memory_first_threshold

Specifies the first threshold for the memory usage. Ifthe Agent uses about 100 MB of memory, you areadvised to set this parameter to 314572800. The unitis byte by default.

cpu_second_pct_threshold

Specifies the second threshold for the CPU usage. Ifthe CPU usage of the Agent process is about 20%,you are advised to set this parameter to 55. The unitis percent (%).

memory_second_threshold

Specifies the second threshold for the memory usage.If the Agent process uses about 100 MB memory, youare advised to set this parameter to 734003200. Theunit is byte by default.

To query the CPU usage and memory usage of the Agent process, usethe following method:● Linux

top -p telescope PID● Windows

View the details of the Agent process in the Task Manager.

{ "InstanceId":"xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "ProjectId": "b5b92ee0xxxxxxxxxxxxxxxxcab92396", "AccessKey": "QZ0XGJXFxxxxxxxxT65R", "SecretKey": "lEv2aXAGwxxxxxxxxxxxxxxxxxxxxF8t0Bf18Tn2", "RegionId": "ap-southeast-1", "ClientPort": 0, "PortNum": 200, "cpu_first_pct_threshold": 35, "memory_first_threshold": 314572800, "cpu_second_pct_threshold": 70, "memory_second_threshold": 734003200}

c. Run the following command to save and exit the conf.json file::wq

4. Run the following command to restart the Agent:/usr/local/telescope/telescoped restart

For a Windows OS, in the directory where the Agent installation package is stored,double-click the shutdown.bat script to stop the Agent, and execute the start.batscript to start the Agent.

2.24 How Many Statuses Does the Agent Have?The Agent has the following statuses:

● Not installed or started: The Agent is not installed on the ECS or BMS or theAgent is manually stopped.



● Running: The Agent is running properly and can properly report monitoringdata.

● Faulty: The Agent sends a heartbeat message to Cloud Eye every 1 minute. IfCloud Eye cannot receive a heartbeat for 3 minutes, Agent Status is displayedas Faulty.

a. In this case, check whether the configuration is correct based onManually Configuring the Agent.

b. Locate the cause in log /usr/local/telescope/log/common.log.

● Configuration error: No agency has been configured for the ECS or BMS, thecurrent agency permissions are abnormal, the current agency is invalid, or thesecurity group rule of the default NIC or the DNS configuration is incorrect.

2.25 How Do I Change the Phone Number and EmailAddress for Receiving Alarm Notifications?

Alarm notifications can be sent to account contacts or SMN topic subscriberswhen you create alarm rules.

You can change phone numbers and email addresses of your account contacts orSMN topics.

For Cloud Account Contacts

If you set Notification Object to Account contact, alarm notifications will be sentto the mobile number and email address registered for your account.

You can update them in the account center so that notifications can be sent to thenew contact addresses.


2. Hover your mouse on the username in the upper right corner and select BasicInformation.

The My Account page is displayed.

3. Click Edit following the phone number or email address.

4. Change the mobile number or email address as prompted.

For SMN Topics

If you select an SMN topic for Notification Object, perform the following steps tochange the mobile numbers and email addresses:


2. Under Application, select Simple Message Notification.

3. In the navigation pane, choose Topic Management > Topics.

4. Click the name of the required topic.

5. Add or delete subscription endpoints of the topic.



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2.26 How Can a Sub Account Receive AlarmNotifications?

To enable a sub account to receive alarm notifications, you can subscribe theaccount email address or phone number to an SMN topic and select the topicwhen you create alarm rules. For details, see Creating a Topic and AddingSubscriptions.

2.27 Why Do I Receive a Bandwidth Overflow AlarmNotification But No Overspeed Record Is Available inthe Monitoring Data?

If the average bandwidth overflow value within 5 minutes does not exceed thethreshold, no alarm record will be generated. However, you may have configuredthat alarm notifications be triggered immediately. Once an instant bandwidthoverflow value exceeds the threshold, you will receive a notification.

2.28 Why Are the Memory Usage and Disk UsageMetrics Not Available for My ECS?

Linux ECSs do not support memory usage and disk usage metrics. The two metricsare available for Windows OS only.

For details about basic monitoring metrics supported by different OSs, see BasicECS Metrics.

To monitor memory and disk usages, see Installing the Agent.

2.29 How Do I Enable the Data Disk Usage AlarmNotification?

You need to install the server monitoring Agent to monitor the disk usage. If youneed to enable the disk usage alarm notification, set the alarm policy to (Agent)Disk Usage (Recommended) and select a mount point when Enabling AlarmNotifications for Server Monitoring.

After installing the Agent, you can view the data disk usage on the Cloud Eyeconsole. On the OS Monitoring page, click the Disk tab and select a mount pointbesides the Auto Refresh button.



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Figure 2-13 Viewing the data disk usage on the OS Monitoring page



Contents1 Concepts1.1 What Is Cloud Eye?1.2 What Alarm Status Does Cloud Eye Support?1.3 Which Alarm Severities Are Supported by Cloud Eye?1.4 What Is Rollup?1.5 How Long Is the Metric Data Retained?1.6 How Many Rollup Methods Does Cloud Eye Support?1.7 What OSs Does the Agent Support?1.8 How Do I Upgrade the Agent?1.9 Why Is the Metric Collection Point Lost During Certain Period of Time?

2 Usages2.1 What Is an Alarm Notification? How Many Types of Alarm Notifications Does Cloud Eye Support? How Can I Configure Them?2.2 Why Are the Network Traffic Metrics in Cloud Eye Different from Those Detected in ECS?2.3 What Are the Effects on ECS Metrics If VM Tools Is Not Installed on ECSs?2.4 Why Is the Monitoring Data Not Displayed on the Cloud Eye Console?2.5 How Can I Export Monitoring Data?2.6 Under What Circumstances Will an Alarm Rule Trigger "Insufficient data"?2.7 How Do I Handle the Garbled CSV File If I Open It with Excel?2.8 Why I Cannot See the Monitoring Data on the Cloud Eye Console After Purchasing Cloud Service Resources?2.9 How Can I Ensure the Newly Purchased ECS Has the OS Monitoring Function?2.10 Why the Cloud Eye Console Does Not Display the OS Monitoring Data or the Data Display Is Lagged After Agent Is Installed and Configured on ECS?2.11 What Should I Do If Agent Status Is Faulty?2.12 Restoring Agent Configurations2.13 How Do I Query the Current Agent Version?2.14 How Can I Create an Agency?2.15 What Can I Do If the Agency Has Expired?2.16 What Should I Do If the IAM Account Permission Is Abnormal?2.17 What Can I Do If I Cannot Create an Agency?2.18 What Should I Do If the Agency Is Used by Other Cloud Services?2.19 What Should I Do If the Service Port Is Used by the Agent?2.20 How to Change the DNS Server Address and Add Security Group Rules?2.21 Why Is the Basic Monitoring Data Inconsistent with the OS Monitoring Data?2.22 Why a BMS Is Displayed in the ECS List on the Server Monitoring Page After the Agent Is Installed on the BMS?2.23 What Should I Do If the Monitoring Period Is Interrupted or the Agent Status Frequently Changes?2.24 How Many Statuses Does the Agent Have?2.25 How Do I Change the Phone Number and Email Address for Receiving Alarm Notifications?2.26 How Can a Sub Account Receive Alarm Notifications?2.27 Why Do I Receive a Bandwidth Overflow Alarm Notification But No Overspeed Record Is Available in the Monitoring Data?2.28 Why Are the Memory Usage and Disk Usage Metrics Not Available for My ECS?2.29 How Do I Enable the Data Disk Usage Alarm Notification?

Documents

FAQs - support.huaweicloud.com · Debian 7.5.0, 8.2.0, 8.8.0, 9.0.0 Ubuntu 14.04 server, 16.04 server EulerOS 2.2 SUSE Enterprise11 SP4, Enterprise12 SP1, Enterprise12 SP2 Fedora