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- Product Overview
- Purchase Guide
- Quick Start
- Operation Guide
- 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
- Network
- Container
- Simulating Container Resource Network Faults
- Experiment on Container Resource Pod Operation Faults
- Experiment on Container Resource Node Faults
- Experiment on Container Resource Application Process Faults
- Standard Cluster and Serverless Cluster Super Node Faults
- Serverless Pod Fault Experiment Case
- Cluster Node Resource (CPU, Memory, Disk) Stress Test Faults
- Serverless Pod Virtual Node Shutdown Faults
- Simulating Serverless Cluster Pod Network Faults
- High Cluster Pod Resource (CPU, Memory, and Disk) Utilization Rate
- Cluster Pod TencentCloud API Ban
- Big Data
- Cloud Load Balancer
- Message Queue
- Direct Connect
- Custom Actions
- Cloud Streaming Services (CSS)
- Compute
- Permission Management Guide
- API Documentation
- FAQs
- Related Protocol
- Contact Us
Simulating Primary-secondary Switch in Redis
Last updated: 2024-09-26 15:47:38
Background
Redis cluster is an important component for storing hot data of businesses. To ensure business availability, Gossip protocol between nodes in the cluster is used to determine node status. Heartbeat timeout (cluster-node-timeout) is 15s by default. If the fault node is the primary node, Tencent Cloud Redis will apply a failover mechanism and select a new primary node from the secondary node.
Based on the above features, Tencent Smart Advisor-Chaotic Fault Generator provides a manual method to skip node fault stage and directly simulate fault actions for HA policy. You can simulate the impact on businesses in the short period when failover occurs in Redis cluster by manual fault method.
Experiment Implementation
Experiment Preparation
Prepare a multi-node cross-availability zone Redis instance.
Experiment Steps
Step 1: Create an Experiment
1. Log in to the Tencent Smart Advisor > Chaotic Fault Generator, go to the Experiment Management page, and click Create a New Experiment.
2. Click Skip and create a blank experiment .
3. Fill in basic information. For Experiment Resource Object, select TencentDB for Redis memory edition under Cloud Resource Type, and add an instance.
Step 2: Add Actions
1. Click Add Now to add a fault action. Select Redis primary-secondary switch in Redis for fault action.
2. In action parameters setting, flexibly select primary/replica switch mode based on a simulated disaster recovery scene:
Prefer switching within the same availability zone
Simulate the real HA policy scene of Tencent Cloud Redis when the primary node is faulty: the latest data node is uplifted to the primary node; when data is identical, priority is given to other nodes in the same availability zone.
Prefer switching within the same availability zone
When an entire availability zone is faulty, nodes in another availability zone will be raised for the primary scene.
Step 3: Execute Experiment Actions
Go to Experiment Details. In the Experiment Action Group, click Execute to start executing an experiment.
Check Results
Take cross-availability zone mode as an example, check whether the availability zone state has changed before and after fault injection.
Yes
No
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