Fluent Bit is a lightweight and high-performance log processor and forwarder that allows you to collect data and logs from different sources, unify them, and send them to multiple destinations. It is designed to handle data collection and processing efficiently, making it an ideal choice for cloud and containerized environments.
When using Fluent Bit, you might encounter a TLS handshake failure. This issue typically manifests as an error message indicating that the TLS handshake process could not be completed successfully. This error prevents Fluent Bit from establishing a secure connection with the destination server.
The TLS handshake failure in Fluent Bit is often due to misconfigurations in the TLS setup. This can include incorrect certificates, protocol mismatches, or unsupported cipher suites. These issues prevent the client and server from agreeing on a secure communication channel.
To resolve TLS handshake failures in Fluent Bit, follow these steps:
Ensure that the certificates used by Fluent Bit are valid and correctly configured. Check the certificate chain and ensure that the root and intermediate certificates are trusted by the destination server.
openssl verify -CAfile ca.pem client-cert.pem
Ensure that both the client (Fluent Bit) and the server support the same TLS protocol versions. You can specify the protocol version in Fluent Bit's configuration:
[OUTPUT]
Name es
Match *
Host your-elasticsearch-host
Port 9200
tls On
tls.verify On
tls.version TLSv1_2
Ensure that the cipher suites supported by Fluent Bit are compatible with those supported by the server. You can test the server's supported cipher suites using:
openssl s_client -connect your-server:443 -tls1_2
For more detailed information on configuring TLS in Fluent Bit, refer to the official Fluent Bit documentation. Additionally, you can explore the OpenSSL documentation for more insights into certificate and protocol management.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)