$ vault status
Error checking seal status: Get https://172.16.4.117:8200/v1/sys/seal-status: x509: certificate signed by unknown authority
Solution:
$ export VAULT_SKIP_VERIFY=true
$ vault status
Key Value
--- -----
Seal Type shamir
Initialized false
Sealed false
Total Shares 5
Threshold 3
Version 0.11.1
Cluster Name vault-cluster-4f8347e6
Cluster ID 7759ef1c-56b4-887f-236b-de9dd252a002
HA Enabled false