Hi Eduardo. That's a pretty interesting question, at least for me.
First why do you restart all haproxies at the same time and don't use rolling updates ? https://kubernetes.io/docs/tutorials/kubernetes-basics/update/update-intro/ Maybe you can add a init container to update the peers in the current running haproxy pod's with socket commands, if possible. https://kubernetes.io/docs/concepts/workloads/pods/init-containers/ http://cbonte.github.io/haproxy-dconv/1.9/management.html#9.3 Agree with you that peers possibility would be nice. Some other questions are. * how often happen such a restart? * how many entries are in the tables? I don't see anything wrong to use a "quorum" Server. This is a pretty common solution even on contained setups. Regards Aleks Wed May 22 15:36:10 GMT+02:00 2019 Eduardo Doria Lima <[email protected]>: > Hi, > I'm using HAProxy to support a system that was initially developed for Apache > (AJP) and JBoss. Now we are migrating it's infrastructure to a Kubernetes > cluster with HAProxy as ingress (load balancer). > The big problem is this system depends strict to JSESSIONID. Some internal > requests made in Javascript or Angular don't respect browser cookies and send > requests only with original Jboss JSESSIONID value. > Because of this we need a sticky-table to map JSESSIONID values. But in a > cluster environment ( https://github.com/jcmoraisjr/haproxy-ingress > [https://github.com/jcmoraisjr/haproxy-ingress] ) HAProxy has many instances > and this instances don't have fixed IP, they are volatile. > Also, in Kubernetes cluster everything is in constant change and any change > is a reload of all HAProxy instances. So, we lost the sticky-table. > Even we use "peers" feature as described in this issue ( > https://github.com/jcmoraisjr/haproxy-ingress/issues/296 > [https://github.com/jcmoraisjr/haproxy-ingress/issues/296] ) by me, we don't > know if table will persist because all instances will reload in the same time. > We thought to use a separate HAProxy server only to cache this table. This > HAProxy will never reload. But I'm not comfortable to use a HAProxy server > instance only for this. > I appreciate if you help me. Thanks! > > Att, > Eduardo >
