docker_config_json does not work with bootstrap_env vars #1727
Description
Description
Passing docker_config_json results in the EKS node not being able to join the cluster. Caused because printf strips the slashes \ in the encoded json.
locals {
docker_config_json = <<JSON
{
"bridge": "none",
"log-driver": "json-file",
"log-opts": {
"max-size": "10m",
"max-file": "10"
},
"live-restore": true,
"max-concurrent-downloads": 10
}
JSON
}replace strips the empty spaces.
jsonencode(replace(local.docker_config_json, "/[[:space:]]/", ""))outputs:
"{\"bridge\":\"none\",\"log-driver\":\"json-file\",\"log-opts\":{\"max-size\":\"10m\",\"max-file\":\"10\"},\"live-restore\":true,\"max-concurrent-downloads\":10}"When the above is passed to the userdata script.
printf strips the escapes, and export strips the quotes "" resulting in a malformed json object and docker service failing to start.
I've tried all the bash alchemy I know, If there is a way to accomplosh this where i could populate the json object properly in the environment, it would be very nice.
Removing the printf and replacing it with a cat heredoc file insertion could fix this I believe keeping the escaping intact and the export would then inject a properly formated json object in the environment.
⚠️ Note
- Behavior was tested on bash shell. (behaves differently on zsh)
- Tried without jsonencode. tried adding quotes to the json object inside the local as well.
- Not using a custom AMI
Versions
Terraform: 0.13.6
Provider(s): AWS: 3.63.0
Module: 17.23.0
Reproduction
Add the following to the node group definition as well as the local defined in the description
bootstrap_env = {
DOCKER_CONFIG_JSON = jsonencode(replace(local.docker_config_json, "/[[:space:]]/", ""))
}EKS node won't be able to join the cluster. SSH in to the node and look insde /etc/docker/daemon.json we can see the malformed json.