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Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,11 @@ private Constants() {
public static final String ASSUMED_ROLE_ARN =
"fs.s3a.assumed.role.arn";

/**
* external id for assume role request: {@value}.
*/
public static final String ASSUMED_ROLE_EXTERNAL_ID = "fs.s3a.assumed.role.external.id";

/**
* Session name for the assumed role, must be valid characters according
* to the AWS APIs: {@value}.
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Original file line number Diff line number Diff line change
Expand Up @@ -125,13 +125,18 @@ public AssumedRoleCredentialProvider(@Nullable URI fsUri, Configuration conf)
duration = conf.getTimeDuration(ASSUMED_ROLE_SESSION_DURATION,
ASSUMED_ROLE_SESSION_DURATION_DEFAULT, TimeUnit.SECONDS);
String policy = conf.getTrimmed(ASSUMED_ROLE_POLICY, "");
String externalId = conf.getTrimmed(ASSUMED_ROLE_EXTERNAL_ID, "");

LOG.debug("{}", this);

AssumeRoleRequest.Builder requestBuilder =
AssumeRoleRequest.builder().roleArn(arn).roleSessionName(sessionName)
.durationSeconds((int) duration);

if (StringUtils.isNotEmpty(externalId)) {
requestBuilder.externalId(externalId);
}

if (StringUtils.isNotEmpty(policy)) {
LOG.debug("Scope down policy {}", policy);
requestBuilder.policy(policy);
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Original file line number Diff line number Diff line change
Expand Up @@ -153,6 +153,14 @@ Here are the full set of configuration options.
</description>
</property>

<property>
<name>fs.s3a.assumed.role.external.id</name>
<value>arbitrary value, specific by user in AWS console</value>
<description>
External id for assumed role, it's an optional configuration. "https://aws.amazon.com/cn/blogs/security/how-to-use-external-id-when-granting-access-to-your-aws-resources/"
</description>
</property>

<property>
<name>fs.s3a.assumed.role.policy</name>
<value/>
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