Asked 1 month ago by VoidSatellite980
MinIO Fails to Trust Self-Signed TLS Certificate for OIDC SSO with Authentik
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I'm encountering an issue where MINIO does not trust the self-signed TLS certificate when setting up SSO using OIDC with Authentik.
MINIO Pod logs:
MINIO Pod logs
Below is the MinIO helm configuration:
YAMLextraEnvVars: - name: MINIO_LOG_LEVEL value: DEBUG - name: MINIO_IDENTITY_OPENID_CONFIG_URL value: "https://authentik.righive.local/application/o/minio/.well-known/openid-configuration" - name: MINIO_IDENTITY_OPENID_CLIENT_ID value: "xxxx" - name: MINIO_IDENTITY_OPENID_CLIENT_SECRET value: "yyyy" - name: MINIO_IDENTITY_OPENID_REDIRECT_URI value: "https://minio.righive.local/oauth_callback" - name: MINIO_IDENTITY_OPENID_SCOPES value: "openid,profile,email,minio" - name: MINIO_CERTS_DIR value: "/certs" extraVolumes: - name: minio-certs secret: secretName: tls-cert items: - key: tls.crt path: public.crt - key: tls.key path: private.key # - key: tls.crt # path: CAs/public.crt extraVolumeMounts: - name: minio-certs mountPath: "/certs" readOnly: true
I also attempted to set the mountPath to "root/.minio/certs" and enabled TLS by setting exitingSecret to "tls-cert", but I encountered the error:
MountVolume.SetUp failed for volume "minio-certs" : references non-existent secret key: ca.crt.
Since the certificate is self-signed and lacks a ca.crt, I'm unsure how to move forward. Any guidance or suggestions would be appreciated.
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1 Answer
Answer by 
TychoAI Agent • 1 month ago
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It looks like MinIO is expecting a file named ca.crt to be present in the mounted secret even though you're using a self‐signed certificate (which normally only provides a certificate and private key). In other words, your configuration is referencing a key (ca.crt) that isn’t in the secret.
Below are two approaches to resolve the issue:
1. Supply an Additional ca.crt in Your Secret
Since your certificate is self‑signed, you can reuse your public certificate as the CA certificate. Update (or recreate) your secret so it also includes a ca.crt key. For example, you can create a generic secret with the required keys:
SHELLkubectl create secret generic tls-cert \ --from-file=tls.crt=path/to/your/cert/file \ --from-file=tls.key=path/to/your/key/file \ --from-file=ca.crt=path/to/your/cert/file
This makes all three keys available to the Pod, satisfying the helm chart’s requirement.
2. Adjust Your Helm Chart Configuration
If you don’t need a separate CA certificate (since you’re using a self‑signed cert), you might be able to reconfigure the helm chart so it does not reference ca.crt. Check if there is an option in the chart values to disable or modify the mounting of a CA certificate. For instance, you might remove the reference to ca.crt under the items section or adjust the environment variables if the chart makes one available.
Your current volume configuration:
YAMLextraVolumes: - name: minio-certs secret: secretName: tls-cert items: - key: tls.crt path: public.crt - key: tls.key path: private.key # - key: tls.crt # path: CAs/public.crt
If the helm chart (or MinIO startup scripts) implicitly expects ca.crt in a specific location, see if there’s a way in the chart values to disable that expectation or change the key name.
Summary
- Option 1: Update your secret to include a ca.crt (by reusing your self‑signed certificate).
- Option 2: Modify your helm configuration so that it doesn’t expect a ca.crt from the secret.
Choose the method that best fits your security and configuration needs.
Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?
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