Select the Manage actions link next to a resource to display the capabilities enabled for that resource. In the Targets view, you can also manage the capabilities enabled on this resource. You've now successfully added your Linux VM to Chaos Studio. Select Upgrade if you're not on the latest model. Select Instances, and then select all instances. If you're enabling a virtual machine scale set, upgrade instances to the latest model by going to the virtual machine scale set resource pane. The portal enables the agent target and capabilities and installs the chaos agent as a VM extension. The Azure portal adds the user-assigned identity to the VM. Select the Managed Identity to use to authenticate the chaos agent and optionally enable Application Insights to see experiment events and agent logs.Īfter a few minutes, a notification appears that indicates that the resources selected were successfully enabled. Then select Enable agent-based targets from the dropdown menu. Select the checkbox next to your VM and select Enable targets. Search for Chaos Studio (preview) in the search bar. Then you assign it to the target VM or virtual machine scale set. Prior to finishing the next steps, you must create a user-assigned managed identity. Or: sudo dnf -y install & sudo yum -y install stress-ngĮnable the chaos target, capabilities, and agent For example: sudo apt-get update & sudo apt-get -y install unzip & sudo apt-get -y install stress-ng Then run the appropriate installation command for your package manager. To install stress-ng, connect to your Linux VM. This open-source application can cause various stress events on a VM. The Chaos Studio agent for Linux requires stress-ng. You use it to inject faults in the guest operating system. The chaos agent is an application installed on your VM as a VM extension. Another target type enables agent-based faults (which requires the installation of an agent). One target type enables service-direct faults (where no agent is required). To add a VM to Chaos Studio, create a target and capabilities on the resource. If you don't have a user-assigned managed identity, you can create one.Įnable Chaos Studio on your virtual machineĬhaos Studio can't inject faults against a VM unless that VM was added to Chaos Studio first. A user-assigned managed identity that was assigned to the target VM or virtual machine scale set.A network setup that permits you to SSH into your VM.If you don't have a VM, you can create one. If you don't have an Azure subscription, create an Azure free account before you begin. A service-direct fault runs directly against an Azure resource without any need for instrumentation. An agent-based fault requires setup and installation of the chaos agent. You can use these same steps to set up and run an experiment for any agent-based fault. Running this experiment can help you defend against an application from becoming resource starved. In this article, you cause a high CPU event on a Linux virtual machine (VM) by using a chaos experiment and Azure Chaos Studio Preview. You can use a chaos experiment to verify that your application is resilient to failures by causing those failures in a controlled environment.
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