CCM Doesn't Work When VLAN IP Is Configured As Node's Internal IP

[lots0logs]

General:

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• Have you checked to ensure there aren't other open or closed Pull Requests for the same bug/feature/question?

---

Bug Reporting

The problem is that the Linode API /instance/{instance_id}/ips endpoint does not include VLAN IP address in its response. That causes this check to fail because it does not find the configured IP address in the list of IPs that the CCM provided for the instance:

https://github.com/kubernetes-sigs/cloud-provider-azure/blob/deef381acb3c34b95223c3789e7a3edbbc32c1b4/pkg/nodemanager/nodemanager.go#L558

Expected Behavior

VLAN IP should be supported for the node's internal IP

Steps to Reproduce the Problem

1. Deploy CCM onto a new single node RKE cluster with the internal IP set to VLAN IP
2. Check logs of the CCM pod

Environment Specifications

Kubernetes: 1.21.7
RKE: 1.3.15

Screenshots, Code Blocks, and Logs

E1130 18:33:49.503962       1 node_controller.go:212] error syncing 'rancher-dev': failed to get node modifiers from cloud provider: failed to find kubelet node IP from cloud provider, requeuing
2022/11/30 18:34:22.375645 DEBUG RESTY
==============================================================================
~~~ REQUEST ~~~
GET  /v4/linode/instances/redacted  HTTP/1.1
HOST   : api.linode.com
HEADERS:
Accept: application/json
Authorization: Bearer redacted
Content-Type: application/json
User-Agent: linode-cloud-controller-manager linodego/v0.32.2 https://github.com/linode/linodego
BODY   :
***** NO CONTENT *****
------------------------------------------------------------------------------
~~~ RESPONSE ~~~
STATUS       : 200 OK
RECEIVED AT  : 2022-11-30T18:34:22.375520522Z
TIME DURATION: 95.928433ms
HEADERS      :
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: Authorization, Origin, X-Requested-With, Content-Type, Accept, X-Filter
Access-Control-Allow-Methods: HEAD, GET, OPTIONS, POST, PUT, DELETE
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Status
Cache-Control: private, max-age=0, s-maxage=0, no-cache, no-store, private, max-age=60, s-maxage=60
Connection: keep-alive
Content-Length: 736
Content-Security-Policy: default-src 'none'
Content-Type: application/json
Date: Wed, 30 Nov 2022 18:34:22 GMT
Retry-After: 27
Server: nginx
Strict-Transport-Security: max-age=31536000
Vary: Authorization, X-Filter, Authorization, X-Filter
X-Accepted-Oauth-Scopes: linodes:read_only
X-Content-Type-Options: nosniff
X-Customer-Uuid: redacted
X-Frame-Options: DENY, DENY
X-Oauth-Scopes: *
X-Ratelimit-Limit: 800
X-Ratelimit-Remaining: 796
X-Ratelimit-Reset: 1669833290
X-Spec-Version: 4.141.0
X-Xss-Protection: 1; mode=block
BODY         :
{
"id": redacted,
"label": "redacted",
"group": "redacted",
"status": "running",
"created": "2022-11-28T23:38:51",
"updated": "2022-11-28T23:38:51",
"type": "g6-standard-4",
"ipv4": [
"redacted",
"redacted"
],
"ipv6": "redacted",
"image": null,
"region": "us-southeast",
"specs": {
"disk": 163840,
"memory": 8192,
"vcpus": 4,
"gpus": 0,
"transfer": 5000
},
"alerts": {
"cpu": 360,
"network_in": 10,
"network_out": 10,
"transfer_quota": 80,
"io": 10000
},
"backups": {
"enabled": false,
"available": false,
"schedule": {
"day": null,
"window": null
},
"last_successful": null
},
"hypervisor": "kvm",
"watchdog_enabled": true,
"tags": [
"redacted"
],
"host_uuid": "redacted"
}
==============================================================================
2022/11/30 18:34:22.496147 DEBUG RESTY
==============================================================================
~~~ REQUEST ~~~
GET  /v4/linode/instances/redacted/ips  HTTP/1.1
HOST   : api.linode.com
HEADERS:
Accept: application/json
Authorization: Bearer redacted
Content-Type: application/json
User-Agent: linode-cloud-controller-manager linodego/v0.32.2 https://github.com/linode/linodego
BODY   :
***** NO CONTENT *****
------------------------------------------------------------------------------
~~~ RESPONSE ~~~
STATUS       : 200 OK
RECEIVED AT  : 2022-11-30T18:34:22.496016304Z
TIME DURATION: 120.189321ms
HEADERS      :
Access-Control-Allow-Credentials: true
Access-Control-Allow-Headers: Authorization, Origin, X-Requested-With, Content-Type, Accept, X-Filter
Access-Control-Allow-Methods: HEAD, GET, OPTIONS, POST, PUT, DELETE
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Status
Cache-Control: private, max-age=0, s-maxage=0, no-cache, no-store, private, max-age=60, s-maxage=60
Connection: keep-alive
Content-Length: 973
Content-Security-Policy: default-src 'none'
Content-Type: application/json
Date: Wed, 30 Nov 2022 18:34:22 GMT
Retry-After: 27
Server: nginx
Strict-Transport-Security: max-age=31536000
Vary: Authorization, X-Filter, Authorization, X-Filter
X-Accepted-Oauth-Scopes: linodes:read_only
X-Content-Type-Options: nosniff
X-Customer-Uuid: redacted
X-Frame-Options: DENY, DENY
X-Oauth-Scopes: *
X-Ratelimit-Limit: 800
X-Ratelimit-Remaining: 798
X-Ratelimit-Reset: 1669833290
X-Spec-Version: 4.141.0
X-Xss-Protection: 1; mode=block
BODY         :
{
"ipv4": {
"public": [
{
"address": "redacted",
"gateway": "redacted",
"subnet_mask": "255.255.255.0",
"prefix": 24,
"type": "ipv4",
"public": true,
"rdns": "redacted",
"linode_id": redacted,
"region": "us-southeast"
}
],
"private": [
{
"address": "redacted",
"gateway": null,
"subnet_mask": "255.255.128.0",
"prefix": 17,
"type": "ipv4",
"public": false,
"rdns": null,
"linode_id": redacted,
"region": "us-southeast"
}
],
"shared": [],
"reserved": []
},
"ipv6": {
"slaac": {
"address": "redacted",
"gateway": "fe80::1",
"subnet_mask": "ffff:ffff:ffff:ffff::",
"prefix": 64,
"type": "ipv6",
"rdns": null,
"linode_id": redacted,
"region": "us-southeast",
"public": true
},
"link_local": {
"address": "fe80::f03c:93ff:fe09:0573",
"gateway": "fe80::1",
"subnet_mask": "ffff:ffff:ffff:ffff::",
"prefix": 64,
"type": "ipv6",
"rdns": null,
"linode_id": redacted,
"region": "us-southeast",
"public": false
},
"global": []
}
}
==============================================================================

[glennpratt]

Likely fix in #141

[glennpratt]

@lots0logs hopefully #141 can be used as a workaround. Let us know!

I plan to do more testing and hopefully automate this feature in the future.