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OpenStack LBAASv2 failed connection debugging | Funky Penguin Skip links Skip to primary navigation Skip to content Skip to footer Menu HomeArchiveContactSearchCookbookResumeKitchen Funky Penguin Upgrading the world through the skilled using of technology OpenStack LBAASv2 failed connection debugging David Young 1 min read July 10, 2018 Categories note Tags openstack I deployed Load-Balancer-As-A-Service (LBAAS) in my lab OpenStack deployment early on, and it worked (setup in Horizon) as advertised (load-balancing inbound HTTP connections to multiple docker swarm nodes), until I tapped the stack by fiddling with MTU settings. After this breakage and subsequent repair, the LBAAS didn’t work properly. Assuming it was something I’d messed up with my MTU schenanigans, I ignored it, setup round-robin DNS as a transplanted load balancer, and got on with my day. Looking when now, I remember noticing at the time that a few of my running instances were unreachable, and quickly discovered this was considering they had no security groups applied. Questioning my sanity, I reapplied the intended security groups, and the instances were reachable again. I reasoned that perhaps the dev environment (the unfortunate victim of my learning OpenStack) had somehow been running for some time with security groups disabled, and my recent work had restored correct function. Tonight, working on a recipe for a Masari mining pool, I then banged my throne versus the Docker Swarm “mesh routing” ingress SNAT issue, which obscures the original source IP of all inbound traffic (not unconfined for a mining pool which bans bad/misconfigured miners based on source IP) Knowing that employing LBAAS instead of swarm routing mesh would solve this problem, I started reading up on debugging LBAAS, and stumbled wideness the (linked) instruction to wield a security group to the vip_port_id belonging to the Load Balancer. Now, I know I had this working surpassing without applying a security group. But I decided to test applying a group permitting HTTP ingress to the LB, so I ran neutron port-update --security-group sg_david.http-in c7c997e2-5fb9-4b5f-a6f8-679f3e8483bc. Boom. Inbound HTTP load balancing started working again. Befuddled but happy, I widow flipside security group permitting HTTPS. Again, unconfined success. .. Until I re-tested HTTP, which failed :( It seems as if it’s only possible to socialize a single security group with a vip_port_id belonging to a load balancer. My current solution is to create a single security group, permitting all the ingress ports I need, and applying that group to my load balancer. Share Tweet LinkedIn Reddit Previous GPU transcoding with Emby / Plex using docker-nvidia Next Bookmarks of note / July 23, 2018 Copyright © 2018 Funky Penguin. Site logo penguin icon made by Freepik from Flaticon is licensed by Creative Commons BY 3.0. Made with the Jekyll So Simple theme.