Nomad unable to parse template client parameters when using json config format

[ncode]

Nomad version

Output from nomad version

./nomad-mac version
Nomad v1.8.4-dev

Operating system and Environment details

Macos and Linux

Issue

Using the template parameters https://developer.hashicorp.com/nomad/docs/configuration/client#template do not work with the config in json format

Reproduction steps

cat ./debug/config.hcl
datacenter = "dc1"
name       = "nomad-client-001"
bind_addr  = "0.0.0.0"
data_dir   = "/opt/nomad/data"

vault {
  enabled = true
  address = "https://vault.services.internal"
}

client {
  enabled = true
  min_dynamic_port = 20000
  max_dynamic_port = 20010
  servers = ["nomad-server-001.internal"]
  cni_path = "/usr/libexec/cni"
  cni_config_dir = "/etc/nomad/cni.d"
  template {
    wait {
       min = "5s"
       max = "15s"
    }
   }
}

consul {
  address = "consul.internal:8500"
}

telemetry {
  collection_interval = "1s"
  disable_hostname = true
  prometheus_metrics = true
  publish_allocation_metrics = true
  publish_node_metrics = true
}

{
  "bind_addr": "0.0.0.0",
  "client": {
    "cni_config_dir": "/etc/nomad/cni.d",
    "cni_path": "/usr/libexec/cni",
    "enabled": true,
    "max_dynamic_port": 20010,
    "min_dynamic_port": 20000,
    "servers": [
      "nomad-server-001.internal"
    ],
    "template": {
      "wait": {
        "max": "15s",
        "min": "5s"
      }
    }
  },
  "consul": {
    "address": "consul.internal:8500"
  },
  "data_dir": "/opt/nomad/data",
  "datacenter": "dc1",
  "name": "nomad-client-001",
  "telemetry": {
    "collection_interval": "1s",
    "disable_hostname": true,
    "prometheus_metrics": true,
    "publish_allocation_metrics": true,
    "publish_node_metrics": true
  },
  "vault": {
    "address": "https://vault.services.internal",
    "enabled": true
  }
}

./nomad config validate ./debug/config.hcl
WARNING: mTLS is not configured - Nomad is not secure without mTLS!
Configuration is valid!

./nomad config validate ./debug/config.json
1 error occurred:
        * Error loading configuration from ./debug/config.json: Error loading debug/config.json: client unexpected keys wait

Expected Result

Template config parameters to be properly used in json

Actual Result

Fail to parse the config

[jrasell]

Hi @ncode and thanks for raising this issue. I have been able to reproduce this locally using main at 4d6856a30619572ef43d0e6ffb803ddb459c4856. I'll move this onto our backlog for roadmapping.

[ncode]

Hi @jrasell I've added a PR for this issue. But looking at the code it looks like the artifact will also need to be fixed later.