Added success logging to the provisioner

[ellistarn]

1. Issue, if available:
#656

2. Description of changes:

karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:22.851Z	ERROR	controller.allocation.provisioner/default	Failed reconciliation, getting subnets, no subnets exist given constraints	{"commit": "eb5139e"}
karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:22.852Z	INFO	controller.allocation.provisioner/default	Watching for pod events	{"commit": "eb5139e"}
karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:32.853Z	INFO	controller.allocation.provisioner/default	Starting provisioning loop	{"commit": "eb5139e"}
karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:32.853Z	INFO	controller.allocation.provisioner/default	Waiting to batch additional pods	{"commit": "eb5139e"}
karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:33.870Z	INFO	controller.allocation.provisioner/default	Found 1 provisionable pods	{"commit": "eb5139e"}
karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:33.894Z	INFO	controller.allocation.provisioner/default	Computed packing for 1 pod(s) with instance type option(s) [t3.micro t3a.micro t3.small c1.medium t3a.small t3.medium t3a.medium c5a.large c5ad.large c4.large c5d.large c3.large c5.large c5n.large m1.large m5.large m3.large m4.large m5d.large m5a.large]	{"commit": "eb5139e"}
karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:33.894Z	ERROR	controller.allocation.provisioner/default	Failed reconciliation, getting subnets, no subnets exist given constraints	{"commit": "eb5139e"}
karpenter-controller-7cdf8884cf-psvb9 manager 2021-09-08T21:43:33.894Z	INFO	controller.allocation.provisioner/default	Watching for pod events	{"commit": "eb5139e"}

3. Does this change impact docs?

• Yes, PR includes docs updates
• Yes, issue opened: link to issue
• No

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[netlify]

✔️ Deploy Preview for karpenter-docs-prod ready!

🔨 Explore the source changes: 5d8d27a

🔍 Inspect the deploy log: https://app.netlify.com/sites/karpenter-docs-prod/deploys/61392ed134d5300007b14941

😎 Browse the preview: https://deploy-preview-666--karpenter-docs-prod.netlify.app

[JacobGabrielson]

Just curious, I'm not sure I can figure out why this is in a defer?

[ellistarn]

This prints at the end of reconciliation. If the controller is hanging, the last log line will be "Watching for pod events". I could change this to something like "Waiting for pod events". The idea is to reassure users that karpenter is working even if its hanging.

[bwagner5]

lgtm