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Remove mutual exclusivity in calico: NAT and router mode #9255

Merged
merged 5 commits into from
Sep 13, 2022
Merged

Remove mutual exclusivity in calico: NAT and router mode #9255

merged 5 commits into from
Sep 13, 2022

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HoKim98
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@HoKim98 HoKim98 commented Sep 5, 2022 •
edited by floryut
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What type of PR is this?
/kind bug

What this PR does / why we need it:

In special cases it's needed to enable peer_with_router with NAT in calico, such as in labs.
But these have been implemented as mutually exclusive, so there is no way to enable both of them.

So, I offer a optional feature that forcefully enables NAT mode even when `peer_with_router` is enabled: * `peer_with_router_nat_outgoing` to forcefully enable NAT when `peer_with_router` is enabled (default value: false).

So, I think it's better to release the mutual exclusivity between nat_outgoing and peer_with_router.
If someone wants to use peer_with_router without the NAT, he/she should disable the nat_outgoing manually.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[Calico] The NAT (`nat_outgoing`) would not be disabled automatically when enabling `peer_with_router`.

@k8s-ci-robot k8s-ci-robot added the kind/feature Categorizes issue or PR as related to a new feature. label Sep 5, 2022
@k8s-ci-robot k8s-ci-robot added the cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. label Sep 5, 2022
@k8s-ci-robot k8s-ci-robot added the needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. label Sep 5, 2022
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Hi @kerryeon. Thanks for your PR.

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@k8s-ci-robot k8s-ci-robot added the size/S Denotes a PR that changes 10-29 lines, ignoring generated files. label Sep 5, 2022
@HoKim98 HoKim98 force-pushed the add-peer_with_router_nat_outgoing branch from 97bcec2 to a1ea040 Compare September 5, 2022 13:32
oomichi
oomichi reviewed Sep 12, 2022
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/cc @oomichi

docs/calico.md Outdated
Then the following variables need to be set:

* `nat_outgoing` to enable NAT (default value: true).
* `peer_with_router_nat_outgoing` to forcefully enable NAT (default value: false).
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to forcefully enable NAT (default value: false).

seems to make confusions because nat_outgoing is to enable NAT and the default value is true.
That means the NAT is already enabled by default.

roles/network_plugin/calico/tasks/install.yml Outdated
@@ -227,7 +227,7 @@
"cidr": "{{ calico_pool_cidr | default(kube_pods_subnet) }}",
"ipipMode": "{{ calico_ipip_mode }}",
"vxlanMode": "{{ calico_vxlan_mode }}",
"natOutgoing": {{ nat_outgoing|default(false) and not peer_with_router|default(false) }}
"natOutgoing": {{ nat_outgoing|default(false) and ((not peer_with_router|default(false)) or (peer_with_router_nat_outgoing|default(false))) }}
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Can we control this use case with the existing nat_outgoing only?

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@HoKim98 HoKim98 Sep 12, 2022 •
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Sure, we can remove the mutual exclusivity between nat_outgoing and not peer_with_router by ignoring the peer_with_router flag.

But it may causes for users that enable peer_with_router to get side-effect.

Regardless, the direction of concise and complete improvement seems to fit the content of the review, so I made a new commit.

@k8s-ci-robot k8s-ci-robot added size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. and removed size/S Denotes a PR that changes 10-29 lines, ignoring generated files. labels Sep 12, 2022
@HoKim98 HoKim98 changed the title Add optional NAT support in calico router mode Remove mutual exclusivity in calico: NAT and router mode Sep 12, 2022
@k8s-ci-robot k8s-ci-robot added size/S Denotes a PR that changes 10-29 lines, ignoring generated files. and removed size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. labels Sep 12, 2022
oomichi
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Thanks for updating.

/ok-to-test
/approve

roles/network_plugin/calico/tasks/install.yml
@@ -227,7 +227,7 @@
"cidr": "{{ calico_pool_cidr | default(kube_pods_subnet) }}",
"ipipMode": "{{ calico_ipip_mode }}",
"vxlanMode": "{{ calico_vxlan_mode }}",
"natOutgoing": {{ nat_outgoing|default(false) and not peer_with_router|default(false) }}
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This original line has been added since #3086
And I could not find the reason of this condition.
The new line

"natOutgoing": {{ nat_outgoing|default(false) }}

seems pretty straightforward for me.

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wow PR 3xxx 😄

@k8s-ci-robot k8s-ci-robot added ok-to-test Indicates a non-member PR verified by an org member that is safe to test. approved Indicates a PR has been approved by an approver from all required OWNERS files. and removed needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels Sep 12, 2022
floryut
floryut approved these changes Sep 13, 2022
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@kerryeon All good for me
/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Sep 13, 2022
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floryut, kerryeon, oomichi

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@floryut floryut added kind/network Network section in the release note and removed kind/feature Categorizes issue or PR as related to a new feature. labels Sep 13, 2022
@k8s-ci-robot k8s-ci-robot merged commit 952cad8 into kubernetes-sigs:master Sep 13, 2022
@floryut floryut mentioned this pull request Sep 19, 2022
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enneitex pushed a commit to enneitex/kubespray that referenced this pull request Jan 25, 2023
@HoKim98 @enneitex
Remove mutual exclusivity in calico: NAT and router mode (kubernetes-…
0452fb4 
…sigs#9255)

* Add optional NAT support in calico router mode

* Add a blank line in front of lists

* Remove mutual exclusivity: NAT and router mode

* Ignore router mode from NAT

* Update calico doc
nolimitkun pushed a commit to nolimitkun/kubespray that referenced this pull request Mar 19, 2023
@HoKim98 @nolimitkun
Remove mutual exclusivity in calico: NAT and router mode (kubernetes-…
72a64eb 
…sigs#9255)

* Add optional NAT support in calico router mode

* Add a blank line in front of lists

* Remove mutual exclusivity: NAT and router mode

* Ignore router mode from NAT

* Update calico doc
LuckySB pushed a commit to southbridgeio/kubespray that referenced this pull request Jul 7, 2023
@HoKim98 @LuckySB
Remove mutual exclusivity in calico: NAT and router mode (kubernetes-…
53f5081 
…sigs#9255)

* Add optional NAT support in calico router mode

* Add a blank line in front of lists

* Remove mutual exclusivity: NAT and router mode

* Ignore router mode from NAT

* Update calico doc
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