Resolve the “NoCredentialProviders: no valid providers in chain” Error in AWS SDK

Here, we will learn how to Resolve the “NoCredentialProviders: no valid providers in chain” Error in AWS SDK with example in details.

The “NoCredentialProviders: no valid providers in chain” error occurs when the AWS SDK is unable to find valid AWS credentials for authenticating your requests.

Reasons for the error:

AWS SDK and CLI rely on a chain of providers to obtain the necessary credentials. When none of these providers can supply valid credentials, the error “NoCredentialProviders: no valid providers in chain” is triggered. The possible reasons for the error include:

1. Missing or incorrectly set environment variables.
2. Incomplete or incorrect AWS CLI configuration.
3. Absence of IAM roles or incorrect IAM roles in EC2 instances, ECS tasks, or Lambda functions.
4. Missing or improperly configured AWS shared credentials file.

How to set up AWS credentials

To resolve the “NoCredentialProviders: no valid providers in chain” Error in AWS SDK, you need to provide valid AWS credentials using one of the following methods:

1: Environment variables:

Example:

export AWS_ACCESS_KEY_ID="your_access_key_id"
export AWS_SECRET_ACCESS_KEY="your_secret_access_key"

2: AWS CLI configuration:

Example:

aws configure
# Enter your access key, secret key, default region, and output format when prompted.

3: EC2 Instance Profiles:

Example:

• Assign an IAM role with the necessary permissions to your EC2 instance via the AWS Management Console or CLI.

4: AWS Shared Credentials file:

Example:

Create a file named credentials in the .aws directory in your home directory and add the following content:

[default]
aws_access_key_id = YOUR_ACCESS_KEY
aws_secret_access_key = YOUR_SECRET_KEY

5: Amazon ECS Task Role:

Example:

• Create an IAM role with the required permissions and assign it to your Amazon ECS task definition.

6: AWS Lambda Execution Role:

Example:

• Assign an IAM role with the required permissions to your AWS Lambda function.

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