Background
In some scenes, a business system may cause frequent occupation of a CVM disk, making the disk unreadable and non-writable. The platform provides a CVM disk IO hang fault action to allow users to verify the capability of their systems for handling such abnormality.
Note:
This fault action only supports Centos7.2, Debian8.2 and Ubuntu16.0.4 and later operating systems.
Experiment Implementation
Step 1: Experiment Preparation
Prepare several CVM instance objects for the experiment.
Step 2: Experiment Orchestration
2. Click Skip and create a blank experiment. Fill in the experiment information, and select a CVM instance for the experiment objective.
3. Click Add Now to add an experiment action, select IO Resources, and select IO Hang fault.
4. Configure fault action parameters.
5. Submit to create an experiment.
Step 3: Experiment Execution
1. In the Experiment Action Group, click Execute to execute an experiment and start fault injection.
2. Click the Action Card to check results of the action execution.
Through inquiry of the IO monitoring metrics graph, you can find that IO has dropped and fault action has taken effect.
3. Execute recovery actions. We can see through disk monitoring that IO has recovered.