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- Fault Action Library
- Compute
- JVM Process CPU at Full Load
- Cross-AZ Experiment in CVM
- CVM DNS Unavailability Experiment
- CVM Domain Name Parsing Tampering Experiment
- CVM System Time Skew
- CVM Disk IO Hang Fault Experiment
- CVM Memory OOM and Disk IO Load
- Experiments on CVM Intra-host Network Disorder
- CVM Kernel Faults
- Experiments on CVM Intra-host Network Latency
- High Utilization of CVM Resources (CPU, Memory, and Disk)
- Experiments on CVM Intra-host Network Corruption
- Experiments on CVM Intra-host Network Duplication
- Experiments on CVM Intra-host Network Occupation
- CVM Network Interruption
- CVM Ping Unreachable
- Cloud API Ban in CVM
- Database
- Primary-secondary Switch in TencentDB for PostgreSQL
- MySQL Instance Overall Unavailable
- Primary-secondary Switch in MySQL
- Setting Maximum Number of Connections in MySQL
- Primary Node Fault Experiment on TencentDB for MySQL
- TencentDB for MySQL Read-only Instance Group Unavailable
- Primary-secondary Switch in TDSQL for MySQM
- Primary-secondary Switch in MariaDB
- Primary-secondary Switch in TDSQL-C
- Practice of TencentDB for Redis Proxy Node Faults
- TencentDB for Redis Primary Node Fault
- Primary-secondary Nodes in TencentDB for Redis Instance Unavailable
- Simulating Primary-secondary Switch in Redis
- Simulating MongoDB Storage Node Fault
- Simulating Self-Built MySQL Crash Through Network Blocking
- Restarting TencentDB for MySQL
- Primary-secondary Switch in SQL Server
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- Experiment on Container Resource Pod Operation Faults
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- High Cluster Pod Resource (CPU, Memory, and Disk) Utilization Rate
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Implementing CRS Connection Count Increase with Custom Actions
Last updated: 2024-09-26 15:49:18
Background
CFG allows users to customize fault actions for chaos engineering experiments. In fault scenarios where stress test is executed on MySQL or CRS, a CVM instance within the same VPC as MySQL or CRS can be used to execute stress test scripts.
Practical Examples
The following demonstrates how to use custom actions to implement CRS connection count increase.
Step 1: Experiment preparation
A CVM instance used for fault injection with a Redis client installed, used to connect to the CRS instance (Ensure the CVM can be connected to the CRS instance.)
A CRS instance that is in the same VPC with the CVM
Fault action script file
Step 2: Create custom actions
1. Log in to Tencent Smart Advisor > Chaotic Fault Generator, enter the Action Library Management page, and select Create Custom Action.
2. Configure the custom actions. Configure command content and command parameters. Click Save after you complete the configuration.
The example command content includes parameters such as request_num, host, port, password, and client_count, which can be passed during execution.
redis-benchmark -q -n {{request_num}} -h {{host}} -p {{port}} -a '{{password}}' -c {{client_count}}
Step 3: Experiment orchestration
1. Enter the Experiment Management page, click Create a New Experiment, fill in the experiment details, and select the objective CVM instance for the experiment.
2. Click Add Experiment Action in the lower-left corner, select Shell Script, select the custom action you created, and click Next.
3. Modify the default parameters of the action according to the stress test requirements.
4. After configuring action parameters, click Next. After filling in the experiment global configuration, click Submit.
Step 4: Execute the experiment
1. Execute the experiment and observe the execution results.
2. During execution, you can monitor data on the CRS console.
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