Hi, I have a 3 node cluster, trying to setup the TLS security using the link above.
Without enabling the below configs, the cluster is able to discover each other
After enabling, all 3 nodes complain: "SSLHandshakeException: no cipher suites in common"
These are the steps that i did on each node
- generate cert using elasticsearch-certutil, placed them in config folder
- add the 4 lines of xpack command into elasticsearch.yml
Anyone know what does this mean?
The error message means that a client in a TLS handshake couldn't agree on a mutually supported cipher suite. This can be misleading , as it can also happen in the context of Java when one of the two is configured with no available keys for TLS.
Can you share with us:
- The exact command that you used to create the
- The output of
openssl -in /opt/elasticsearch/config/elastic-certificates.p12 -info
- The logs ( The exception stacktraces ) from a couple of your nodes.
command ran on all 3 nodes
/opt/elasticsearch/bin/elasticsearch-certutil cert --out /opt/elasticsearch/config/elastic-certificates.p12 --pass ""
I can't generate any output from command
openssl -in /opt/elasticsearch/config/elastic-certificates.p12 -info. Do you need all three nodes?
I cannot explain why you are getting a cipher suites error, but the problem here is that you ran that command on each node.
You skipped step 1 which creates a single CA for your cluster. Because you didn't do that step the
/opt/elasticsearch/bin/elasticsearch-certutil cert command generated a new CA each time you ran it, which will not work.
If you are going to use
/opt/elasticsearch/bin/elasticsearch-certutil cert without first generating a CA, then you need to run it once and then copy that certificate keystore to each node.
Thanks for replying. I have included the step to generate one CA, transfer the CA to all three nodes and ran the following command:
/opt/elasticsearch/bin/elasticsearch-certutil cert --ca /etc/elasticsearch/elastic-stack-ca.p12 --ca-pass "" --out /opt/elasticsearch/config/elastic-certificates.p12 --pass ""
Sadly, after restarting all 3 nodes, they were still complain: "SSLHandshakeException: no cipher suites in common"
Can you provide the complete error message from the log, including the stack trace please.
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