Writes logs to a specified Logstore.
Description
When you call the PutLogs operation to write logs to Simple Log Service, Simple Log Service checks the format of the logs. If a log does not meet the format requirements, the request fails and no logs are written to Simple Log Service.
You can write logs only in the Protocol Buffers (Protobuf) format as log groups. For more information, see Data encoding.
You can write logs in one of the following modes:
LoadBalance: In this mode, logs are randomly written to a shard that is available in the specified Logstore. This mode delivers high availability for write operations and is suitable for data consumption scenarios in which you do not need to preserve the order of logs.
KeyHash: In this mode, a hash key is added to the request parameters. The shard to which logs are written is determined based on the hash key. The hash key is optional. If you do not configure the hash key, logs are written to shards in LoadBalance mode. For example, Simple Log Service can write data from a producer such as an instance to a shard based on the hash value of the instance name. This ensures that the data that is written to the shard is ordered and the data in the shard is consumed based on the order. This way, when a shard is split or when shards are merged, the data that contains the same hash key is included only in one shard at a time. For more information, see Shard.
The maximum size of raw logs that can be written to Simple Log Service when the PutLogs operation is called is 10 MB. We recommend that the total size of the values for each log in a log group does not exceed 1 MB. Historical versions of SDKs may have different limits. We recommend that you upgrade your SDK to the latest version.
The references for Simple Log Service SDK for Java and Simple Log Service SDK for Python provide examples on how to call the PutLogs operation. For more information, see Get started with Log Service SDK for Java and Get started with Log Service SDK for Python.
Protobuf log data
The following tables describe the fields of compressed log data in the Protobuf format. For more information, see Data model and Data encoding.
Log
Parameter
Type
Required
Description
Time
Integer
Yes
The timestamp at which logs are generated. The timestamp follows the UNIX time format. It is the number of seconds that have elapsed since 00:00:00 Thursday, January 1, 1970.
Contents
List
Yes
The list of log fields. The list must contain at least one element. For more information, see the Content table.
Content
Parameter
Type
Required
Description
Key
String
Yes
The name of the custom key.
Value
String
Yes
The value of the custom key.
LogTag
Parameter
Type
Required
Description
Key
String
Yes
The name of the custom key.
Value
String
Yes
The value of the custom key.
LogGroup
Parameter
Type
Required
Description
Logs
List
Yes
The list of logs. For more information, see the Log table.
Topic
String
No
The topic of logs. This field is user-defined and is used to distinguish between logs.
Source
String
No
The source of logs. For example, the IP address of the server in which the log is generated can be used as the source.
LogTags
List
Yes
The list of log tags. For more information, see the LogTag table.
Request syntax
LoadBalance mode
POST /logstores/logstoreName/shards/lb HTTP/1.1 Authorization: LOG yourAccessKeyId:yourSignature Content-Type: application/x-protobuf Content-Length: Content Length Content-MD5: Content MD5 Date: GMT Date Host: ProjectName.Endpoint x-log-apiversion: 0.6.0 x-log-bodyrawsize: BodyRawSize x-log-compresstype: lz4 x-log-signaturemethod: hmac-sha1 <Compressed log data in the Protobuf format>
KeyHash mode
POST /logstores/logstoreName/shards/route?key=14d2f850ad6ea48e46e4547edbbb27e0 Authorization: LOG yourAccessKeyId:yourSignature Content-Type: application/x-protobuf Content-Length: Content Length Content-MD5: Content MD5 Date: GMT Date Host: ProjectName.Endpoint x-log-apiversion: 0.6.0 x-log-bodyrawsize: BodyRawSize x-log-compresstype: lz4 x-log-signaturemethod: hmac-sha1 <Compressed log data in the Protobuf format>
Host consists of a project name and a Simple Log Service endpoint. You must specify a project in Host.
Request parameters
Request headers
For more information about the common request headers of Simple Log Service API, see Common request headers.
Request parameters
Parameter
Type
Required
Example
Description
projectName
String
Yes
ali-test-project
The name of the project.
logstoreName
String
Yes
sample-logtail-config
The name of the Logstore.
Response parameters
Response headers
This operation returns only common response headers. For more information about the common response headers of Simple Log Service API, see Common response headers.
Response elements
If the HTTP status code 200 is returned, the request is successful. If the request is successful, no response elements are returned.
Examples
Sample requests
POST /logstores/sls-test-logstore/shards/lb { "Content-Length": 118, "Content-Type":"application/x-protobuf", "x-log-bodyrawsize":1356, "Host": "ali-test-project.cn-hangzhou-devcommon-intranet.sls.aliyuncs.com", "Content-MD5":"6554BD042149C844761C2C094A8FECCE", "Date":"Thu, 12 Nov 2015 06:54:26 GMT", "x-log-apiversion": "0.6.0", "x-log-compresstype":"lz4" "x-log-signaturemethod": "hmac-sha1", "Authorization":"LOG yourAccessKeyId:yourSignature" } <Binary data that is obtained after logs in the Protobuf format are compressed by using the LZ4 algorithm>
Sample success responses
Header { "Access-control-allow-origin" : "*", "Date" : "Wed, 11 Nov 2015 08:28:20 GMT", "Server" : "Tengine", "Content-Length" : 0, "x-log-requestid" : "5642FC2399248C8F7B0145FD", "Connection" : "close" }
Error codes
HTTP status code | Error code | Error message | Description |
400 | PostBodyInvalid | Protobuffer content cannot be parsed. | The error message returned because the logs in the Protobuf format are invalid and cannot be parsed. |
400 | InvalidTimestamp | Invalid timestamps are in logs. | The error message returned because the logs contain invalid timestamps. |
400 | InvalidEncoding | Non-UTF8 characters are in logs. | The error message returned because the logs contain non-UTF-8 characters. |
400 | InvalidKey | Invalid keys are in logs. | The error message returned because the logs contain invalid keys. |
400 | PostBodyTooLarge | Logs must be less than or equal to 3 MB and 4096 entries. | The error message returned because the size of logs is greater than or equal to 3 MB or the number of logs exceeds 4,096. |
400 | PostBodyUncompressError | Failed to decompress logs. | The error message returned because the logs failed to be decompressed. For more information, see Data compression. |
400 | PostBodyInvalid | The post data time is out of range | The error message returned because the log timestamp is not within the time range [-168 hours,+15 minutes]. |
404 | LogStoreNotExist | logstore logstoreName does not exist. | The error message returned because the specified Logstore does not exist. |
For a list of error codes, see Common error codes.