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Support AWS ARN role #62

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Support AWS ARN role #62

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3 changes: 2 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ resources:
source:
access_key_id: {{aws-access-key}}
secret_access_key: {{aws-secret-key}}
aws_role_arn: arn:aws:iam::{{s3_account_id}}:role/{{s3_user}}
bucket: {{aws-bucket}}
path: [<optional>, use to sync to a specific path of the bucket instead of root of bucket]
change_dir_to: [<optional, see note below>]
Expand All @@ -32,7 +33,7 @@ jobs:

## AWS Credentials

The `access_key_id` and `secret_access_key` are optional and if not provided the EC2 Metadata service will be queried for role based credentials.
The `access_key_id`, `secret_access_key` and `aws_role_arn` are optional and if not provided the EC2 Metadata service will be queried for role based credentials.

## change_dir_to

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10 changes: 10 additions & 0 deletions assets/check
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Expand Up @@ -8,6 +8,7 @@ set -e
payload=`cat`
bucket=$(echo "$payload" | jq -r '.source.bucket')
prefix="$(echo "$payload" | jq -r '.source.path // ""')"
role=$(echo "$payload" | jq -r '.source.aws_role_arn // empty')

# export for `aws` cli
AWS_ACCESS_KEY_ID=$(echo "$payload" | jq -r '.source.access_key_id // empty')
Expand All @@ -18,6 +19,15 @@ AWS_DEFAULT_REGION=$(echo "$payload" | jq -r '.source.region // empty')
if [ -n "$AWS_ACCESS_KEY_ID" ] && [ -n "$AWS_SECRET_ACCESS_KEY" ]; then
export AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID
export AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY
if [ -n "$role" ]; then
session_name=$(date +%s)
export $(printf "AWS_ACCESS_KEY_ID=%s AWS_SECRET_ACCESS_KEY=%s AWS_SESSION_TOKEN=%s" \
$(aws sts assume-role \
--role-arn $role \
--role-session-name $session_name \
--query "Credentials.[AccessKeyId,SecretAccessKey,SessionToken]" \
--output text))
fi
fi

# Export AWS_DEFAULT_REGION if set
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10 changes: 10 additions & 0 deletions assets/in
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Expand Up @@ -19,6 +19,7 @@ payload=`cat`
bucket=$(echo "$payload" | jq -r '.source.bucket')
path=$(echo "$payload" | jq -r '.source.path // ""')
options=$(echo "$payload" | jq -r '.source.options // [] | join(" ")')
role=$(echo "$payload" | jq -r '.source.aws_role_arn // empty')

# export for `aws` cli
AWS_ACCESS_KEY_ID=$(echo "$payload" | jq -r '.source.access_key_id // empty')
Expand All @@ -29,6 +30,15 @@ AWS_DEFAULT_REGION=$(echo "$payload" | jq -r '.source.region // empty')
if [ -n "$AWS_ACCESS_KEY_ID" ] && [ -n "$AWS_SECRET_ACCESS_KEY" ]; then
export AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID
export AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY
if [ -n "$role" ]; then
session_name=$(date +%s)
export $(printf "AWS_ACCESS_KEY_ID=%s AWS_SECRET_ACCESS_KEY=%s AWS_SESSION_TOKEN=%s" \
$(aws sts assume-role \
--role-arn $role \
--role-session-name $session_name \
--query "Credentials.[AccessKeyId,SecretAccessKey,SessionToken]" \
--output text))
fi
fi

# Export AWS_DEFAULT_REGION if set
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10 changes: 10 additions & 0 deletions assets/out
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Expand Up @@ -22,6 +22,7 @@ bucket=$(echo "$payload" | jq -r '.source.bucket')
path=$(echo "$payload" | jq -r '.source.path // ""')
options=$(echo "$payload" | jq -r '.source.options // [] | join(" ")')
change_dir_to=$(echo "$payload" | jq -r '.source.change_dir_to // "." ')
role=$(echo "$payload" | jq -r '.source.aws_role_arn // empty')

# export for `aws` cli
AWS_ACCESS_KEY_ID=$(echo "$payload" | jq -r '.source.access_key_id // empty')
Expand All @@ -32,6 +33,15 @@ AWS_DEFAULT_REGION=$(echo "$payload" | jq -r '.source.region // empty')
if [ -n "$AWS_ACCESS_KEY_ID" ] && [ -n "$AWS_SECRET_ACCESS_KEY" ]; then
export AWS_ACCESS_KEY_ID=$AWS_ACCESS_KEY_ID
export AWS_SECRET_ACCESS_KEY=$AWS_SECRET_ACCESS_KEY
if [ -n "$role" ]; then
session_name=$(date +%s)
export $(printf "AWS_ACCESS_KEY_ID=%s AWS_SECRET_ACCESS_KEY=%s AWS_SESSION_TOKEN=%s" \
$(aws sts assume-role \
--role-arn $role \
--role-session-name $session_name \
--query "Credentials.[AccessKeyId,SecretAccessKey,SessionToken]" \
--output text))
fi
fi

# re-enable trace since we're done interacting with sensitive values
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