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Limit nodes considered for ingress load balancer based on taints [1/2] #2749

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merged 2 commits into from
Dec 11, 2019

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mikkeloscar
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This is a proposal for how we can reduce the amount of targets in the ingress load balancers to only the relevant nodes.

Right now the problem is that all nodes are considered as target (but only those running skipper will get traffic) even if the node is a master node or a special node pool which wouldn't be able to run skipper because of taints.

The idea is to first only limit the possible targets to worker nodes and then tag all node pools which DON'T have any taints defined to be considered as target. Later we can be more specific and allow certain type of nodes e.g. if we have a dedicated system/skipper node pool in place.

The tag:zalando.org/ingress-enabled=true is marked as TODO for now because we need to do the rollout in two steps to be safe.

@mikkeloscar mikkeloscar force-pushed the ingress-controller-targets branch 2 times, most recently from efc7c6a to cbb744e Compare December 5, 2019 08:06
@mikkeloscar mikkeloscar changed the title Limit nodes considered for ingress load balancer basedon taints [1/2] Limit nodes considered for ingress load balancer based on taints [1/2] Dec 5, 2019
@mikkeloscar
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👍

@mikkeloscar
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Depends on full rollout of v1.15 before we can merge because it depends on the node.kubernetes.io/role label.

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This is now ready for review!

@mikkeloscar mikkeloscar changed the base branch from kube-1.15 to dev December 10, 2019 09:41
@mikkeloscar mikkeloscar force-pushed the ingress-controller-targets branch from aaa291b to 7676cd5 Compare December 10, 2019 09:43
@mikkeloscar
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👍

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@szuecs
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szuecs commented Dec 11, 2019

👍

@szuecs szuecs merged commit 2efeae7 into dev Dec 11, 2019
@szuecs szuecs deleted the ingress-controller-targets branch December 11, 2019 14:22
This was referenced Dec 11, 2019
This was referenced Dec 16, 2019
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3 participants