feat(services/oss): support ECS RAM role credentials#7480
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Pull request overview
This PR extends the Aliyun OSS service’s default credential resolution chain to support Alibaba Cloud ECS instance RAM role credentials, enabling automatic authentication in ECS environments without explicitly configured access keys.
Changes:
- Add
EcsRamRoleCredentialProviderto the OSS defaultProvideCredentialChain. - Update OSS credential resolution order to: explicit static keys (if configured) → env credentials → ECS RAM role credentials → OIDC assume-role credentials.
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Which issue does this PR close?
Closes #.
apache/opendal-reqsign#742
Rationale for this change
OSS currently supports loading credentials from environment variables, static access keys, and OIDC assume-role flow. However, it doesn't include ECS RAM role credentials in the default credential chain.
This makes OSS fail to authenticate in Alibaba Cloud ECS environments where credentials are expected to come from the instance RAM role.
What changes are included in this PR?
Add
EcsRamRoleCredentialProviderinto OSS's default credential provider chain.With this change, OSS now resolves credentials in the following order:
Are there any user-facing changes?
Yes. OSS can now authenticate with ECS RAM role credentials automatically when running inside supported Alibaba Cloud ECS environments, without requiring users to provide access key credentials explicitly.
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