My confusion now leads me to the self signed client certs issue.
I signed the client cert with CN as the influxdb username !
for the test I added to influxdb config
https-enabled = true
# The SSL certificate to use when HTTPS is enabled.
https-certificate = "/etc/ssl/influxdb-selfsigned.crt"
# Use a separate private key location.
https-private-key = "/etc/ssl/influxdb-selfsigned.key"
# The SSL certificate used to validate client certificates
#https-ca-certificate = "/etc/ssl/<ca-certificate-file>.crt"
https-ca-certificate = "/etc/ssl/rootCA.pem"
this is the same rootCA.pem i used to sign the client crt ( it seems thats needed )
still having issue !
curl: (60) Peer's certificate issuer has been marked as not trusted by the user.
More details here: http://curl.haxx.se/docs/sslcerts.html
curl performs SSL certificate verification by default, using a "bundle"
of Certificate Authority (CA) public keys (CA certs). If the default
bundle file isn't adequate, you can specify an alternate file
using the --cacert option.
If this HTTPS server uses a certificate signed by a CA represented in
the bundle, the certificate verification probably failed due to a
problem with the certificate (it might be expired, or the name might
not match the domain name in the URL).
If you'd like to turn off curl's verification of the certificate, use
the -k (or --insecure) option.