Create a single transport to reuse connections, fix performance issues and enable tracing

[MartinForReal]

What type of PR is this?

/kind bug

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #1567

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Create a single transport to reuse connections, address performance issues and enable tracing.

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[netlify]

✅ Deploy Preview for warm-cascaron-bb779f canceled.

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[netlify]

✅ Deploy Preview for kubernetes-sigs-cloud-provide-azure canceled.

Name	Link
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[coveralls]

Coverage increased (+0.02%) to 79.828% when pulling 8af9772 on MartinForReal:master into 8ffd413 on kubernetes-sigs:master.

[andyzhangx]

what's the default values of these numbers, could you add a comment with a link?

[MartinForReal]

updated the comments.

[MartinForReal]

/test pull-cloud-provider-azure-e2e-ccm-vmss-basic-lb

[andyzhangx]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, MartinForReal

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [MartinForReal,andyzhangx]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[MartinForReal]

/test pull-cloud-provider-azure-e2e-capz

[feiskyer]

@MartinForReal cherrypick to release branches?

[MartinForReal]

/cherrypick release-1.24

[MartinForReal]

/cherrypick release-1.23

[MartinForReal]

/cherrypick release-1.1

[MartinForReal]

/cherrypick release-1.0

[k8s-infra-cherrypick-robot]

@MartinForReal: new pull request created: #2071

In response to this:

/cherrypick release-1.24

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[k8s-infra-cherrypick-robot]

@MartinForReal: #2059 failed to apply on top of branch "release-1.23":

Applying: create a single transport to reuse connections and enable tracing
Using index info to reconstruct a base tree...
M	go.mod
M	pkg/azureclients/armclient/azure_armclient.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/azureclients/armclient/azure_armclient.go
CONFLICT (content): Merge conflict in pkg/azureclients/armclient/azure_armclient.go
Auto-merging go.mod
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 create a single transport to reuse connections and enable tracing
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherrypick release-1.23

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[k8s-infra-cherrypick-robot]

@MartinForReal: #2059 failed to apply on top of branch "release-1.1":

Applying: create a single transport to reuse connections and enable tracing
Using index info to reconstruct a base tree...
M	go.mod
M	pkg/azureclients/armclient/azure_armclient.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/azureclients/armclient/azure_armclient.go
CONFLICT (content): Merge conflict in pkg/azureclients/armclient/azure_armclient.go
Auto-merging go.mod
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 create a single transport to reuse connections and enable tracing
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherrypick release-1.1

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[k8s-infra-cherrypick-robot]

@MartinForReal: #2059 failed to apply on top of branch "release-1.0":

Applying: create a single transport to reuse connections and enable tracing
Using index info to reconstruct a base tree...
M	go.mod
M	pkg/azureclients/armclient/azure_armclient.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/azureclients/armclient/azure_armclient.go
CONFLICT (content): Merge conflict in pkg/azureclients/armclient/azure_armclient.go
Auto-merging go.mod
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 create a single transport to reuse connections and enable tracing
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherrypick release-1.0

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.