Using terraform, I'm trying to create two s3 buckets, that each replicate back to each other. This causes a dependency cycle. I'm not sure how to handle this in terraform.
One solution I thought of is possibly split it into two sets of terraform scripts, one to create the two buckets, and then a second to modify those buckets adding the replication rules.
Is there another way to handle this scenario?
Solution for you is described for you. It has some issues with data consistency but works very well.
So basically let's assume you have 2 buckets in 2 separated regions:
To two way replicate you need to setup replication from bucket1-us-east-1 to bucket1-us-west-2. Then setup replication from bucket1-us-west-2 to bucket1-us-east-1
There is a problem with circular dependency, so you need to create resources first in one place then you need to enable replication for them:
resource "aws_s3_bucket" "west" {
provider = "aws.west"
bucket = "bucket1-us-west-2"
region = "us-west-2"
acl = "private"
versioning {
enabled = true
}
replication_configuration {
role = "${aws_iam_role.some_replication_role.arn}"
rules {
id = "replicate_all"
prefix = ""
status = "Enabled"
destination {
bucket = "arn:aws:s3:::bucket1-us-east-1"
storage_class = "STANDARD"
}
}
}
}
resource "aws_s3_bucket" "east" {
provider = "aws.east"
bucket = "bucket1-us-east-1"
region = "us-east-1"
acl = "private"
versioning {
enabled = true
}
replication_configuration {
role = "${aws_iam_role.some_replication_role.arn}"
rules {
id = "replicate_all"
prefix = ""
status = "Enabled"
destination {
bucket = "arn:aws:s3:::bucket1-us-west-2"
storage_class = "STANDARD"
}
}
}
}
