Minikube simple-vault-client runs but with no output

Vault
,
1

Doing a quick refresher with Vault on minikube.

Everything works fine until the Launch a web application section. The web app (hashieducation/simple-vault-client:latest) deploys and runs without issue; steps 1-4 are good.

However, step 5 curl http://localhost:8080 executes but there’s no output; I do get a white page so at least the UI is being served even if there’s no text. Troubleshooting steps

  1. I’ve shelled into the container
  2. curl http://localhost:8080: no output
  3. installed tree and nmap
# nmap localhost
...
PORT     STATE SERVICE
8080/tcp open  http-proxy (the port is open for business)
  1. # cat $JWT_PATH: expected output
  2. Search for secret/data/webapp/config

Test to get expected output from find: success

# find / -type d -wholename '/etc/apt'
/etc/apt

Since there is no leading slash in secret/data/webapp/config
the search begins in the current directory:

# find . -type d -wholename 'secret/data/webapp/config'

Again, no output.

root@webapp-59c4db954f-d6p4w:/app# ls -l
-rw-r--r-- 1 root root     349 Feb 15  2023 Dockerfile
-rw-r--r-- 1 root root   11357 Feb 14  2023 LICENSE
-rw-r--r-- 1 root root    1201 Feb 17  2023 README.md
-rw-r--r-- 1 root root      28 Feb 14  2023 go.mod
drwxr-xr-x 2 root root    4096 Feb 17  2023 images
-rwxr-xr-x 1 root root 7182799 Mar  2  2023 main
-rw-r--r-- 1 root root    2967 Feb 14  2023 main.go
-rw-r--r-- 1 root root    1746 Feb 14  2023 types.go
-rw-r--r-- 1 root root     967 Feb 17  2023 vault-hello-world.yaml

But, it appears there’s no secret directory anywhere

# find / -type d -name '*secret*'
/sys/module/secretmem
/usr/share/doc/git/contrib/credential/libsecret
/run/secrets
root@webapp-59c4db954f-d6p4w:/app# tree /run/secrets/
/run/secrets/
`-- kubernetes.io
    `-- serviceaccount
        |-- ca.crt -> ..data/ca.crt
        |-- namespace -> ..data/namespace
        `-- token -> ..data/token

And the one directory with secret in the name does not have data/webapp/config under it.

Does the container have a bug or am I missing something?

If it’s a bug, what is it?

  • in the documentation?
  • vault doesn’t write to the correct path?
  • maybe the webapp retrieves data from the wrong location?

Please advise.

2

Hi!

Can you export logs of the container too? if there a problem with boot process, is there a log information about that.