- Release Notes and Announcements
- User Guide
- Product Introduction
- Purchase Guide
- Getting Started
- Operation Guide
- Resource Management
- Permission Management
- Log Collection
- Collection Overview
- Collecting Logs in Self-Built Kubernetes Cluster
- Collecting Syslog
- Collection by LogListener
- Collecting Text Log
- Uploading Log over Kafka
- Uploading Logs via Anonymous Write
- Uploading Logs via Logback Appender
- Uploading Logs via Log4j Appender
- Uploading Log via SDK
- Uploading Log via API
- Importing Data
- Tencent Cloud Service Log Access
- Log Storage
- Search and Analysis
- Syntax and Rules
- Statistical Analysis (SQL)
- Quick Analysis
- SQL Syntax
- SQL Functions
- String Function
- Date and Time Functions
- IP Geographic Function
- URL Function
- Mathematical Calculation Functions
- Mathematical Statistical Function
- General Aggregate Function
- Geospatial Function
- Binary String Function
- Estimation Function
- Type Conversion Function
- Logical Function
- Operators
- Bitwise Operation
- Regular Expression Function
- Lambda Function
- Conditional Expressions
- Array Functions
- Interval-Valued Comparison and Periodicity-Valued Comparison Functions
- JSON Functions
- Window Functions
- Sampling Analysis
- Configuring Indexes
- Reindexing
- Context Search and Analysis
- Downloading Log
- Dashboard
- Data Processing documents
- Data Processing
- Creating Processing Task
- Viewing Data Processing Details
- Data Processing Functions
- Function Overview
- Key-Value Extraction Functions
- Enrichment Functions
- Flow Control
- Row Processing Functions
- Field Processing Functions
- Value Structuring Functions
- Regular Expression Processing Functions
- Time Value Processing Functions
- String Processing Functions
- Type Conversion Functions
- Logical and Mathematical Functions
- Encoding and Decoding Functions
- IP Parsing Functions
- Processing Cases
- Scheduled SQL Analysis
- SCF
- Data Processing
- Shipping and Consumption
- Log Shipping
- Monitoring Alarm
- Historical Documentation
- Best Practices
- Developer Guide
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Topic Management APIs
- Log Set Management APIs
- Index APIs
- Topic Partition APIs
- Machine Group APIs
- Collection Configuration APIs
- Log APIs
- Metric APIs
- Alarm Policy APIs
- Data Processing APIs
- Kafka Protocol Consumption APIs
- CKafka Shipping Task APIs
- Kafka Data Subscription APIs
- COS Shipping Task APIs
- SCF Delivery Task APIs
- Scheduled SQL Analysis APIs
- COS Data Import Task APIs
- Data Types
- Error Codes
- FAQs
- CLS Service Level Agreement
- CLS Policy
- Contact Us
- Glossary
- Release Notes and Announcements
- User Guide
- Product Introduction
- Purchase Guide
- Getting Started
- Operation Guide
- Resource Management
- Permission Management
- Log Collection
- Collection Overview
- Collecting Logs in Self-Built Kubernetes Cluster
- Collecting Syslog
- Collection by LogListener
- Collecting Text Log
- Uploading Log over Kafka
- Uploading Logs via Anonymous Write
- Uploading Logs via Logback Appender
- Uploading Logs via Log4j Appender
- Uploading Log via SDK
- Uploading Log via API
- Importing Data
- Tencent Cloud Service Log Access
- Log Storage
- Search and Analysis
- Syntax and Rules
- Statistical Analysis (SQL)
- Quick Analysis
- SQL Syntax
- SQL Functions
- String Function
- Date and Time Functions
- IP Geographic Function
- URL Function
- Mathematical Calculation Functions
- Mathematical Statistical Function
- General Aggregate Function
- Geospatial Function
- Binary String Function
- Estimation Function
- Type Conversion Function
- Logical Function
- Operators
- Bitwise Operation
- Regular Expression Function
- Lambda Function
- Conditional Expressions
- Array Functions
- Interval-Valued Comparison and Periodicity-Valued Comparison Functions
- JSON Functions
- Window Functions
- Sampling Analysis
- Configuring Indexes
- Reindexing
- Context Search and Analysis
- Downloading Log
- Dashboard
- Data Processing documents
- Data Processing
- Creating Processing Task
- Viewing Data Processing Details
- Data Processing Functions
- Function Overview
- Key-Value Extraction Functions
- Enrichment Functions
- Flow Control
- Row Processing Functions
- Field Processing Functions
- Value Structuring Functions
- Regular Expression Processing Functions
- Time Value Processing Functions
- String Processing Functions
- Type Conversion Functions
- Logical and Mathematical Functions
- Encoding and Decoding Functions
- IP Parsing Functions
- Processing Cases
- Scheduled SQL Analysis
- SCF
- Data Processing
- Shipping and Consumption
- Log Shipping
- Monitoring Alarm
- Historical Documentation
- Best Practices
- Developer Guide
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Topic Management APIs
- Log Set Management APIs
- Index APIs
- Topic Partition APIs
- Machine Group APIs
- Collection Configuration APIs
- Log APIs
- Metric APIs
- Alarm Policy APIs
- Data Processing APIs
- Kafka Protocol Consumption APIs
- CKafka Shipping Task APIs
- Kafka Data Subscription APIs
- COS Shipping Task APIs
- SCF Delivery Task APIs
- Scheduled SQL Analysis APIs
- COS Data Import Task APIs
- Data Types
- Error Codes
- FAQs
- CLS Service Level Agreement
- CLS Policy
- Contact Us
- Glossary
Overview
Cloud Log Service (CLS) provides a one-stop log data solution. You can quickly and conveniently connect to it in five minutes to enjoy a full range of stable and reliable services from log collection, storage, and processing to search, analysis, consumption, shipping, dashboard generation, and alarming, with no need to care about resource issues such as scaling. It helps you improve the problem locating and metric monitoring efficiency in an all-around manner, making log Ops much easier.
This document describes how to use basic CLS features:
Collect log files from servers with LogListener
Search for and analyze logs
If you don't have proper resources to collect logs, you can use demos to quickly try out CLS's log search and analysis, dashboard, and alarming features free of charge without collecting logs.
Step 1. Activate the service
Log in to the Tencent Cloud CLS console. If CLS is not activated for your account, you will be prompted for activation. Just click Activate.
Step 2. Install LogListener
LogListener collects log files to CLS. The following describes how to install it in a Tencent Cloud CVM/Lighthouse instance.
LogListener also supports non-Tencent Cloud servers, TKE, and self-built K8s clusters.
Step 2.1. Get the key
Step 2.2. Install LogListener
1. On the Machine Group Management page, switch to the target CVM/LightHouse region in the top-left corner and click Deploy Instances in the top-right corner.
2. Select the target instance, enter the
SecretId and SecretKey obtained in step 2.1 in Enter a SecretId, and enter Machine label (such as test, which is similar to an instance category for subsequent batch log collection from multiple machines).3. After the installation is completed, click Next.
4. Add the instance with LogListener installed to a new machine group that requires log collection. Log files under the same path can be batch collected for instances in the same group. Enter the Machine Group Name and click Join.
Step 3. Create a log topic
A log topic is the basic unit for log data collection, storage, search, and analysis. It usually corresponds to a certain application/service (with a similar log structure). Log topics can be grouped by logset. A logset doesn't store any log data and is only used to facilitate log topic management.
1. On the Log Topic page, switch to the region in step 2.2 in the top-left corner and click Create Log Topic.
2. In the pop-up window, enter information and click OK.
Log Topic Name:
test for exampleStorage Class: STANDARD
Logset Operation: Create Logset
Logset Name:
test for exampleStep 4. Configure collection rules and indexes
1. On the Log Topic page, click the Log Topic Name/ID in step 3.
2. Select the Collection Configuration tab and click Add in the LogListener Collection Configuration area.
3. On the Log Data Source page, select ** Logs with Full Text in a Single Line**.
Note:
If you select Logs with Full Text in a Single Line, raw logs will be directly reported to CLS, and log fields won't be segmented or extracted. This is a simple way of extraction suitable for getting started with CLS, but it may prevent you from using features such as log search and analysis (for example, log search by field or statistical log analysis). In actual use, we recommend you select a proper log format to segment and extract log fields as instructed in Collection Overview.
For JSON logs, you can select JSON Log File.
4. Select the machine group created in step 2.2 and click Next.
5. Enter the Collection Rule Name and Collection Path (i.e., the path of the target log file) and click Next.
For example, if the absolute path of the target file is
/root/test.log, then the Directory Prefix for Collection Path should be /root, and the file name should be test.log.6. Set the index configuration and enable full-text index.
Note:
If Extraction Mode is not Full text in a single line, you can enable Key-Value Index and click Auto Configure to automatically configure the key-value index for the collected logs.
The modified index configuration takes effect only for newly written logs. Existing data won't be updated.
For more information on index configuration items, see Configuring Index.
Step 5. Search for and analyze logs
1. On the Search and Analysis page, select the log topic created in step 3 at the top to view the collected log data.
2. In the input box at the top, enter the target text as the search condition and click Search and Analysis to search for logs matching the condition.
3. Use the pipe symbol and SQL for statistical analysis of the found raw data.
For example, calculate the distribution of log sources.
Note:
For more information on the search and analysis syntax, see Overview and Syntax Rules.
__SOURCE__ is a system preset field indicating the source IP of a log. After structuring a log and enabling statistics in Key-Value Index for log fields, you can perform statistical analysis on log fields, such as log count by URL.Additional Information
Concepts: This document describes the basic concepts of CLS, including log topic, logset, index, and segment.
Collecting and Searching NGINX Access Logs: This document describes how to collect NGINX logs and use regex to segment and extract log fields.
Migrating Local Logs Searched by the grep Command to CLS: This document describes how to convert the grep command to the CLS search syntax to quickly understand CLS syntax rules.
Tencent Cloud Service Log Access: CLS has integrated some commonly used Tencent Cloud products to easily collect their logs.
Creating Processing Task: The data processing feature provides the capabilities to filter, cleanse, mask, enrich, and distribute raw logs.
Monitoring Alarm Overview: An alarm policy can be set for logs, for example, triggering an alarm when the number of error logs exceeds 10 within one minute.
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