Object retrieve transactions
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You can identify object retrieve transactions in the audit log by locating API-specific (S3 and Swift) audit messages.
Not all audit messages generated during a retrieve transaction are listed in the following tables. Only messages required to trace the retrieve transaction are included.
S3 retrieval audit messages
| Code | Name | Description | Trace | See |
|---|---|---|---|---|
SGET |
S3 GET |
Request made to retrieve an object from a bucket. |
CBID, S3BK, S3KY |
Swift retrieval audit messages
| Code | Name | Description | Trace | See |
|---|---|---|---|---|
WGET |
Swift GET |
Request made to retrieve an object from a container. |
CBID, WCON, WOBJ |
Example: S3 object retrieval
When an S3 client retrieves an object from a Storage Node (LDR service), an audit message is generated and saved to the audit log.
Note that not all audit messages generated during a transaction are listed in the example below. Only those related to the S3 retrieval transaction (SGET) are listed.
SGET: S3 GET
Object retrieval begins when the client sends a GetObject request to an LDR service. The message contains the bucket from which to retrieve the object and the object's S3 Key, which is used to identify the object.
2017-09-20T22:53:08.782605 [AUDT:[RSLT(FC32):SUCS][TIME(UI64):47807][SAIP(IPAD):"10.96.112.26"][S3AI(CSTR):"43979298178977966408"][SACC(CSTR):"s3-account-a"][S3AK(CSTR):"SGKHt7GzEcu0yXhFhT_rL5mep4nJt1w75GBh-O_FEw=="][SUSR(CSTR):"urn:sgws:identity::43979298178977966408:root"][SBAI(CSTR):"43979298178977966408"][SBAC(CSTR):"s3-account-a"]\[S3BK\(CSTR\):"bucket-anonymous"\]\[S3KY\(CSTR\):"Hello.txt"\][CBID(UI64):0x83D70C6F1F662B02][CSIZ(UI64):12][AVER(UI32):10][ATIM(UI64):1505947988782605]\[ATYP\(FC32\):SGET\][ANID(UI32):12272050][AMID(FC32):S3RQ][ATID(UI64):17742374343649889669]]
If the bucket policy allows, a client can anonymously retrieve objects, or can retrieve objects from a bucket that is owned by a different tenant account. The audit message contains information about the bucket owner's tenant account so that you can track these anonymous and cross-account requests.
In the following example message, the client sends a GetObject request for an object stored in a bucket that they don't own. The values for SBAI and SBAC record the bucket owner's tenant account ID and name, which differs from the tenant account ID and name of the client recorded in S3AI and SACC.
2017-09-20T22:53:15.876415 [AUDT:[RSLT(FC32):SUCS][TIME(UI64):53244][SAIP(IPAD):"10.96.112.26"]\[S3AI\(CSTR\):"17915054115450519830"\]\[SACC\(CSTR\):"s3-account-b"\][S3AK(CSTR):"SGKHpoblWlP_kBkqSCbTi754Ls8lBUog67I2LlSiUg=="][SUSR(CSTR):"urn:sgws:identity::17915054115450519830:root"]\[SBAI\(CSTR\):"43979298178977966408"\]\[SBAC\(CSTR\):"s3-account-a"\][S3BK(CSTR):"bucket-anonymous"][S3KY(CSTR):"Hello.txt"][CBID(UI64):0x83D70C6F1F662B02][CSIZ(UI64):12][AVER(UI32):10][ATIM(UI64):1505947995876415][ATYP(FC32):SGET][ANID(UI32):12272050][AMID(FC32):S3RQ][ATID(UI64):6888780247515624902]]
Example: S3 Select on an object
When an S3 client issues an S3 Select query on an object, audit messages are generated and saved to the audit log.
Note that not all audit messages generated during a transaction are listed in the example below. Only those related to the S3 Select transaction (SelectObjectContent) are listed.
Each query results in two audit messages: one that performs the authorization of the S3 Select request (the S3SR field is set to "select") and a subsequent standard GET operation that retrieves the data from storage during processing.
2021-11-08T15:35:30.750038 [AUDT:[RSLT(FC32):SUCS][CNID(UI64):1636385730715700][TIME(UI64):29173][SAIP(IPAD):"192.168.7.44"][S3AI(CSTR):"63147909414576125820"][SACC(CSTR):"Tenant1636027116"][S3AK(CSTR):"AUFD1XNVZ905F3TW7KSU"][SUSR(CSTR):"urn:sgws:identity::63147909414576125820:root"][SBAI(CSTR):"63147909414576125820"][SBAC(CSTR):"Tenant1636027116"][S3BK(CSTR):"619c0755-9e38-42e0-a614-05064f74126d"][S3KY(CSTR):"SUB-EST2020_ALL.csv"][CBID(UI64):0x0496F0408A721171][UUID(CSTR):"D64B1A4A-9F01-4EE7-B133-08842A099628"][CSIZ(UI64):0][S3SR(CSTR):"select"][AVER(UI32):10][ATIM(UI64):1636385730750038][ATYP(FC32):SPOS][ANID(UI32):12601166][AMID(FC32):S3RQ][ATID(UI64):1363009709396895985]]
2021-11-08T15:35:32.604886 [AUDT:[RSLT(FC32):SUCS][CNID(UI64):1636383069486504][TIME(UI64):430690][SAIP(IPAD):"192.168.7.44"][HTRH(CSTR):"{\"x-forwarded-for\":\"unix:\"}"][S3AI(CSTR):"63147909414576125820"][SACC(CSTR):"Tenant1636027116"][S3AK(CSTR):"AUFD1XNVZ905F3TW7KSU"][SUSR(CSTR):"urn:sgws:identity::63147909414576125820:root"][SBAI(CSTR):"63147909414576125820"][SBAC(CSTR):"Tenant1636027116"][S3BK(CSTR):"619c0755-9e38-42e0-a614-05064f74126d"][S3KY(CSTR):"SUB-EST2020_ALL.csv"][CBID(UI64):0x0496F0408A721171][UUID(CSTR):"D64B1A4A-9F01-4EE7-B133-08842A099628"][CSIZ(UI64):10185581][MTME(UI64):1636380348695262][AVER(UI32):10][ATIM(UI64):1636385732604886][ATYP(FC32):SGET][ANID(UI32):12733063][AMID(FC32):S3RQ][ATID(UI64):16562288121152341130]]