Starting Stunnel with configuration:
pid = /usr/local/var/run/stunnel.pid
foreground = yes
debug = notice
[zookeeper-2181]
client = yes
CAfile = /tmp/cluster-ca.crt
cert = /etc/tls-sidecar/kafka-brokers/my-cluster-kafka-1.crt
key = /etc/tls-sidecar/kafka-brokers/my-cluster-kafka-1.key
accept = 127.0.0.1:2181
connect = my-cluster-zookeeper-client:2181
delay = yes
verify = 2
2020.04.20 23:35:55 LOG5[1:140497248761920]: stunnel 4.56 on x86_64-redhat-linux-gnu platform
2020.04.20 23:35:55 LOG5[1:140497248761920]: Compiled/running with OpenSSL 1.0.1e-fips 11 Feb 2013
2020.04.20 23:35:55 LOG5[1:140497248761920]: Threading:PTHREAD Sockets:POLL,IPv6 SSL:ENGINE,OCSP,FIPS Auth:LIBWRAP
2020.04.20 23:35:55 LOG5[1:140497248761920]: Reading configuration from file /tmp/stunnel.conf
2020.04.20 23:35:55 LOG5[1:140497248761920]: FIPS mode is enabled
2020.04.20 23:35:55 LOG5[1:140497248761920]: Configuration successful
2020.04.20 23:36:01 LOG5[1:140497248757504]: Service [zookeeper-2181] accepted connection from 127.0.0.1:33232
2020.04.20 23:36:01 LOG5[1:140497248757504]: connect_blocking: connected 172.30.125.227:2181
2020.04.20 23:36:01 LOG5[1:140497248757504]: Service [zookeeper-2181] connected remote server from 172.17.0.12:36858
2020.04.20 23:36:01 LOG5[1:140497248757504]: Certificate accepted: depth=1, /O=io.strimzi/CN=cluster-ca v0
2020.04.20 23:36:01 LOG5[1:140497248757504]: Certificate accepted: depth=0, /O=io.strimzi/CN=my-cluster-zookeeper