[cf-dev] Silk VXLAN across mutli-datacenter #cf

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[cf-dev] Silk VXLAN across mutli-datacenter #cf

micruzz82
Hi cf-dev team

I wanted to get some more information about how the Silk VXLAN works if you have multi cloud / multi datacenter deployments. If I have a CF deployment in DC-1 and another CF deployment in DC-2 each within unique IP space without stretching the L2 across datacenters, does the Silk VXLAN only get deployed within a single datacenter?

With the multi-cpi feature, a single BOSH director will be able to manage the 2 vcenters in each datacenter. But how will containers in one CF deployment be able to talk to containers in the second CF deployment.

Is there a way the Silk VXLAN can talk at layer 3 instead?

Thanks

M
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Re: [cf-dev] Silk VXLAN across mutli-datacenter #cf

micruzz82
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III
If you take the above case, is there a possibility that the Silk controller at both ends be dynamically be able to learn the node ips from the 2 datacenters through bgp and if it needs to talk to a container on the other end, it will then send the traffic encapsulated in the IPSEC tunnel.

The aim is that no underlying physical network needs to be modified or any changes on the ESXI host level need to be done. Like net networking concept of border leafs in an EVPN fabric. If there is a similar concept of a border node at both sites and SILK controller determines the node is at a remote site, traffic will be sent to the border node through vpn, decapsulated at the other side, received by the SILK controller on the other side and then sent to the destination controller.

I believe if you have this possibility in SILK, you could in theory have a true multi cloud cloud foundry deployment across both on prem and public cloud.

Again this might already exist and I still haven't researched enough.

Thanks

M
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Re: [cf-dev] Silk VXLAN across mutli-datacenter #cf

micruzz82
In reply to this post by micruzz82

[Edited Message Follows]

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III
If you take the above case, is there a possibility that the Silk controller at both ends be dynamically be able to learn the node ips from the 2 datacenters through bgp and if it needs to talk to a container on the other end, it will then send the traffic encapsulated in the IPSEC tunnel.

The aim is that no underlying physical network needs to be modified or any changes on the ESXI host level need to be done. Like the networking concept of border leafs in an EVPN fabric. If there is a similar concept of a border node at both sites and SILK controller determines the node is at a remote site, traffic will be sent to the border node through vpn, decapsulated at the other side, received by the SILK controller on the other side and then sent to the destination container.

I believe if you have this possibility in SILK, you could in theory have a true multi cloud cloud foundry deployment across both on prem and public cloud.

Again this might already exist and I still haven't researched enough.

Thanks

M
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Re: [cf-dev] Silk VXLAN across mutli-datacenter #cf

micruzz82
In reply to this post by micruzz82
Just been reading about Flockport and not sure if that can be integrated with CF CNI... what could be an option is that at each site, every node has a bgp router agent like FRR/Quagga. There should be 2 other nodes which act as route reflectors to advertise the subnets to each of the same site nodes. Wireguard can them be used to build a VPN from each of the border nodes. The BGP peering between the border nodes then advertises the container routes from the other side and this way container to container communication is a possibilty.
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