provide option to specify ca_file

[juliantaylor]

The plugin hardcodes OpenSSL::X509::DEFAULT_CERT_FILE as the ca file.
https://github.com/toshitanian/fluent-plugin-out-http-ext/blob/master/lib/fluent/plugin/out_http_ext.rb#L220
Unfortunately on e.g. Debian this variable points to a non existent file, the system ca bundle is /etc/ssl/certs/ca-certificates.crt

Setting the SSL_CERT_FILE variable also does not appear to override this ruby variable (https://www.openssl.org/docs/man1.1.1/man3/SSL_CTX_set_default_verify_paths.html)

Please provide a configuration option to set the ca_file to use manually.

[cosmo0920]

Hi, upstream plugin supports ca_file option.
Is it enough for you?

[juliantaylor]

yes the updated fluentd plugin provides the feature now, if your code is based on that this issue can be closed.