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So what are the decades old solutions to these problems?
by Confusion 11y ago
So what are the decades old solutions to these problems?
- otterley 11y agoThankfully, they are all discussed in the linked article.
- Confusion 11y agoI read the article: if they are, that is quite unclear to me. Possible answers that are discussed are only 'some sort of IP encapsulation', which is vague and GRE, which is just a single solution. He doesn't seem to disapprove of VXlan, so probably something was missing in 'IP encapsulation and GRE'. Was 'all problems solved decades ago' merely hyperbole or is there actually something to it?
- otterley 11y agoIs GRE inadequate? A single solution that solves most cases, is codified in an RFC, and has mature, reliable, performant implementations sounds like a winner to me.
- wmf 11y agoGRE (well NVGRE) works, but it's not offloaded by most NICs and it doesn't have port numbers to provide as much ECMP entropy as UDP.
- Confusion 11y agoI don't know if GRE is inadequate: if I knew that, I wouldn't need to ask these questions. The author doesn't disapprove of VXlan, so there must be something insufficient in GRE. Look, I'm just trying to understand the playing field here, for when the moment comes that I need that knowledge. I don't currently have a need for funky networking between Docker containers, but I do have Docker containers and can imagine a future need for funky networking. The article slams new technologies, but doesn't clearly explain the alternatives, which is what I'm interested in, so I'm asking follow-up questions. There is nothing rhetorical here.
- theptip 11y agoL3 routing protocols like BGP are one solution to the network connectivity problem which have been around for decades. BGP powers the internet, so we know it can scale to millions of endpoints.
- stephengillie 11y agoI read the article, and I don't understand why we're trying to solve the problem of "telling each ContainerOS to listen/respond to an additional IP address, and route it to the correct Container" by "creating another network layer and accompanying additional complexity". In IIS this is done with Bindings.
- otterley 11y agoOn Linux this is done with virtual interfaces and DHCP. It's actually pretty straightforward.