Yesterday I installed Elasticsearch for the first time, and after I configured the security manully according to the docs: Basic Security / Basic Security plus HTTPS, I try to generate token for Kibana, and I met the error:
ERROR: Unable to create an enrollment token. Elasticsearch node HTTP layer SSL configuration Keystore doesn't contain any PrivateKey entries where the associated certificate is a CA certificate
I searched some pages and didn't get the answer, then I found a discussion on StackOverflow, and it solved my problem. I think maybe I should share my experience with those newbies like me.
Note: Usually we have done this step, so if you didn't do anything else to change these Keystores, skip this step.
Following Basic Security we will get a PKCS12 Keystore containing CA Cert, default filename is elastic-stack-ca.p12.
Following Basic Security plus HTTPS, we will get a PKCS12 Keystore contains a TrustedCertEntry that import from elastic-stack-ca.p12, the default filename of HTTP Keystore is http.p12.
keytool -importkeystore -destkeystore <filename-http-PKCS12> -srckeystore <filename-PKCS12-contains-CA-Cert.p12> -srcstoretype PKCS12
This step changes the CA Cert that was automatically imported into the original HTTP Keystore as TrustCertEntry to PrivateKeyEntry, and this is exactly what that ERROR tells us to do.
Importing keystore config/certs/es-ca.p12 to config/certs/http.p12...
Enter destination keystore password:
Enter source keystore password:
Existing entry alias ca exists, overwrite? [no]: yes
Entry for alias ca successfully imported.
Import command completed: 1 entries successfully imported, 0 entries failed or cancelled
And you can use following command to check:
keytool -keystore <filename-HTTP-PKCS12.p12> -list
The result should contains two PrivateKey entries like:
Keystore type: PKCS12
Keystore provider: SUN
Your keystore contains 2 entries
ca, Sep 5, 2022, PrivateKeyEntry,
Certificate fingerprint (SHA-256): 53:F4:9A:9D:56:A9:3A:AF:90:94:41:FA:D7:15:3F:DF:C1:39:AC:BA:FF:12:44:C0:36:4D:15:4C:20:14:1E:3D
http, Sep 5, 2022, PrivateKeyEntry,
Certificate fingerprint (SHA-256): EF:8D:78:EC:F0:C5:97:1B:7B:58:EF:5F:E3:73:A5:D0:7E:1B:FE:B3:75:B0:B4:D9:CB:80:FC:B3:8E:5D:A5:74
Before generating a new token, make sure you added the password for your private key to the security settings in Elasticsearch.
./bin/elasticsearch-keystore [show|add] xpack.security.http.ssl.keystore.secure_password
Now start the node, and re-generate your token:
./bin/elasticsearch-create-enrollment-token -s [kibana|node]