You can use the Application Monitoring sub-service of Application Real-Time Monitoring Service (ARMS) to monitor Go applications that are deployed in Kubernetes clusters. ARMS allows you to monitor applications based on various performance metrics, such as the topology, API requests, abnormal transactions, slow transactions, and SQL analysis. This topic describes how to automatically install an ARMS agent for Go in a Kubernetes cluster.
This topic does not apply to Alibaba Cloud Container Service for Kubernetes (ACK) clusters. For information about how to install an ARMS agent for Go in an ACK cluster, see Automatically install an ARMS agent in ACK.
Prerequisites
The kube-apiserver version of the Kubernetes cluster is 1.10 or later.
The cluster is accessible over the Internet, or a network connection is established between an Alibaba Cloud virtual private cloud (VPC) and the cluster by using a Cloud Enterprise Network (CEN) instance.
The application uses Go 1.18 or later.
Step 1: Compile the Go binary file
Run the
wgetcommand to download the compilation tool instgo based on the region where the environment and machine reside. Store instgo in a directory where the compiling user has the write permissions, because instgo triggers automatic updates during compilation.NoteThe compilation tool for Go, instgo, is provided by ARMS to help you monitor your Go applications.
If you are able to access Object Storage Service (OSS) over the Internet, you can directly use the public endpoint of the operating system and architecture in the China (Hangzhou) region to obtain the compilation tool.
Grant the compilation tool the permissions required to perform the related operations.
Linux/Darwin
# Grant the permissions. chmod +x instgoWindows
In Windows, you do not need to grant permissions.
Optional. Obtain the license key and set the compilation parameter.
ImportantIf you skip this step, instgo enters Dev mode and installs the ARMS agent of the latest version by default. To deploy the agent in a production environment, we recommend that you set the DescribeTraceLicenseKey parameter.
You can call an API operation to obtain the license key. For more information, see DescribeTraceLicenseKey.
After you obtain the license key, run the
setcommand to set the compilation parameter.instgo set --licenseKey=${YourLicenseKey} --regionId=${YourRegionId} --dev=falseAdd instgo as a prefix to your existing compilation command and run the following command:
instgo go build {arg1} {arg2} {arg3}Use the binary file compiled in the previous step to build the image.
References
The first time that you compile the application, the ARMS agent is downloaded to the
/optdirectory (C:\ProgramDatain Windows) by default. If you have no permissions on the directory, you can use the--cacheDirflag to specify a cache directory or run thesudo -Ecommand to compile the agent. In Windows, run commands to compile the application as an administrator.If the compilation is forcibly stopped or killed, a residue may be caused. For information about how to clean up the residue, see Uninstall an ARMS agent for Go.
Step 2: Install Helm V3
Step 3: Install an ARMS agent for Go
You can use Application Monitoring to monitor the following types of applications: Deployment and StatefulSet. This section uses a Deployment as an example.
Run the following
wgetcommand to download the installation package of the ARMS agent for Go (ack-onepilot).wget 'https://aliacs-app-catalog.oss-cn-hangzhou.aliyuncs.com/charts-incubator/ack-onepilot-3.3.4.tgz'Run the following command to decompress the installation package.
tar xvf ack-onepilot-3.3.4.tgzEdit the values.yaml file in the installation package. Modify the following parameters based on your business requirements and save the file.
registry: registry-__ACK_REGION_ID__.ack.aliyuncs.com/acs/ cluster_id: __ACK_CLUSTER_ID__ accessKey: __ACCESSKEY__ accessKeySecret: __ACCESSKEY_SECRET__ uid: "__ACK_UID__" region_id: __ACK_REGION_ID__registry: the image address of ack-onepilot.cluster_id: the unique ID of the Kubernetes cluster. We recommend that you specify this parameter in the<uid>-<clusterid>format.accessKeyandaccessKeySecret: the AccessKey ID and AccessKey secret of your Alibaba Cloud account. For more information about how to obtain an AccessKey pair, see Create an AccessKey pair.ImportantYou must make sure that the AliyunARMSFullAccess and AliyunSTSAssumeRoleAccess policies are attached to your Alibaba Cloud account.
uid: the ID of your Alibaba Cloud account. To obtain the ID of your Alibaba Cloud account, move the pointer over the profile picture in the upper-right corner of the Alibaba Cloud Management Console.region_id: the region ID. For more information about the regions that support Application Monitoring, see Supported regions.
Install ack-onepilot.
Run the following command without opening the installation package.
helm3 upgrade --install ack-onepilot ack-onepilot --namespace ack-onepilot --create-namespace
Step 4: Modify the YAML file of the application
Run the following command to view the YAML file of the Deployment.
kubectl get deployment {Deployment name} -o yamlNoteIf you do not know the Deployment name, run the following command to view all Deployments. You can find the Deployment in the results. Then, view the YAML file of the application.
kubectl get deployments --all-namespaceRun the following command to open the YAML file of the Deployment.
kubectl edit deployment {Deployment name} -o yamlIn the YAML file, go to the
spec.template.metadatadirectory and add the following content.labels: aliyun.com/app-language: "golang" # The value indicates that the application uses the Go language. armsPilotAutoEnable: "on" armsPilotCreateAppName: "<your-deployment-name>" # Replace <your-deployment-name> with the Deployment name.The following example shows a complete YAML file for creating and monitoring a Deployment in a Kubernetes cluster.
Check the result
After about one minute, log on to the ARMS console. In the left-side navigation pane, choose . If the application is displayed on the Application List page, the application is being monitored.
