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Remove inappropriate allocator import #2855

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@dperny dperny commented May 7, 2019

Removes inappropriate import of manager/allocator/cnmallocator into node/node.go. The consequence of this is that in upstream moby/moby, we can remove that import as well. manager/allocator/cnmallocator is an implementation detail, and importing it so high in the stack creates an unacceptably high degree of coupling.

Specifically, the moby/moby code in question is here: https://github.com/moby/moby/blob/master/daemon/cluster/noderunner.go#L16

and also here:

https://github.com/moby/moby/blob/master/daemon/cluster/noderunner.go#L127-L130

The long-pending long-awaited allocator rewrite on the new-allocator branch removes cnmallocator, and doing this refactoring in an earlier commit will simplify that operation greatly.

/cc @selansen

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codecov bot commented May 7, 2019

Codecov Report

❗ No coverage uploaded for pull request base (master@36866a9). Click here to learn what that means.
The diff coverage is 52.94%.

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m.allocator, err = allocator.New(s, m.config.PluginGetter, m.config.NetworkConfig)
// Toss all this info into a netCfg, so that the allocator can do its
// thing.
netCfg := &cnmallocator.NetworkConfig{

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why are you creating a new config instead of using m.config.NetworkConfig?

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^^ @dperny good point; especially in light of;

The long-pending long-awaited allocator rewrite on the new-allocator branch removes cnmallocator, and doing this refactoring in an earlier commit will simplify that operation greatly.

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Looks good, a few question to improve my understanding

@thaJeztah
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ping @selansen ptal

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Thanks for cleaning it up @dperny

LGTM

// NetworkConfig stores network related config for the cluster
NetworkConfig *cnmallocator.NetworkConfig
// DefaultAddrPool specifies default subnet pool for global scope networks
DefaultAddrPool []string
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Previously, a pointer was used; are there situations where these could be nil (and for a reason?)

Actually wondering; should we just copy the NetworkConfig type here, and use that instead of defining these fields both here, and in node/node.go ?

Removes inappropriate import of manager/allocator/cnmallocator into
node/node.go. The consequence of this is that in upstream moby/moby, we
can remove that import as well. manager/allocator/cnmallocator is an
implementation detail, and importing it so high in the stack creates an
unacceptably high degree of coupling.

Signed-off-by: Drew Erny <drew.erny@docker.com>
@dperny dperny force-pushed the remove-inappropriate-imports branch from c20d5e2 to dceb997 Compare February 17, 2023 15:20
@neersighted
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PTAL @corhere

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🎉

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6 participants