cat_node_data

 cat /etc/puppet/hieradata/node/lin002.yo61.net.yaml
---
ssh.server.port: 20542

error

[root@lin002 ~]# puppet agent --test
Info: Retrieving pluginfacts
Info: Retrieving plugin
Info: Loading facts
Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Could not find data item ssh.server.port in any Hiera data file and no default supplied at /etc/puppet/environments/production/modules/profile_ssh/manifests/server.pp:4 on node lin002.yo61.net
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run

hiera.yaml

---
:backends:
  - yaml

:logger: console

:hierarchy:
  - "node/%{::clientcert}"
  - "environment/%{::environment}"
  - common

:yaml:
  :datadir: /etc/puppet/hieradata

hieradata_tree

# tree /etc/puppet/hieradata
/etc/puppet/hieradata
├── common.yaml
├── environment
│   └── production.yaml
└── node
    └── lin002.yo61.net.yaml

puppet.conf

[master]
storeconfigs = true
storeconfigs_backend = puppetdb
reports = store
hiera_config = /etc/puppet/hiera.yaml
digest_algorithm = md5
pluginsync = true
ssl_client_verify_header = SSL_CLIENT_VERIFY
parser = current
dns_alt_names = puppet
autosign = false
ssl_client_header = SSL_CLIENT_S_DN
certname = puppet.robinbowes.com
environmentpath = /etc/puppet/environments