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container.training/prepare-eks/70_oidc.sh
2021-03-28 12:59:54 +02:00

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#!/bin/sh
# Note: if cluster was created without OIDC provider attached,
# you need to run the following command. It is idempotent.
#eksctl utils associate-iam-oidc-provider --cluster cluster-name-12341234 --approve
if [ "$1" ]; then
CLUSTER="$1"
else
echo "Please indicate cluster to use. Available clusters:"
aws eks list-clusters --output table
exit 1
fi
ACCOUNT=$(aws sts get-caller-identity | jq -r .Account)
OIDC=$(aws eks describe-cluster --name $CLUSTER --query cluster.identity.oidc.issuer --output text | cut -d/ -f3-)
ROLE_NAME=s3-reader-container-training
TRUST_POLICY=$(envsubst <<EOF
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Federated": "arn:aws:iam::${ACCOUNT}:oidc-provider/${OIDC}"
},
"Action": "sts:AssumeRoleWithWebIdentity",
"Condition": {
"StringLike": {
"${OIDC}:sub": ["system:serviceaccount:container-training:*"]
}
}
}
]
}
EOF
)
aws iam create-role \
--role-name "$ROLE_NAME" \
--assume-role-policy-document "$TRUST_POLICY"
kubectl annotate serviceaccounts \
--namespace container-training default \
"eks.amazonaws.com/role-arn=arn:aws:iam::$ACCOUNT:role/$ROLE_NAME" \
--overwrite