[Umbrella Issue] CLI usability improvements

[yue9944882]

• Comprehensive clusteradm get .. command:

  • [x] get clusters:
  • https://github.com/open-cluster-management-io/clusteradm/pull/124
  • [x] get addons:
  • https://github.com/open-cluster-management-io/clusteradm/pull/103
  • https://github.com/open-cluster-management-io/clusteradm/pull/129
  • Show certificate expiry status:
    • API changes: https://github.com/open-cluster-management-io/api/pull/140
  • [x] get works:
  • https://github.com/open-cluster-management-io/clusteradm/pull/131
  • show feedback values
  • [x] get hub-info:
  • https://github.com/open-cluster-management-io/clusteradm/pull/128
  • [x] get klusterlet-info:
  • [x] get clustersets:
  • https://github.com/open-cluster-management-io/clusteradm/pull/124
  • [ ] get placements: https://github.com/open-cluster-management-io/clusteradm/issues/163
  • [ ] general -o [*table|tree|yaml] printers

• Clusterset operatibility:

  • [x] create: https://github.com/open-cluster-management-io/clusteradm/pull/123
  • [x] add cluster/bind namespace: https://github.com/open-cluster-management-io/clusteradm/pull/126
  • [ ] remove cluster
  • [ ] unbind namespace

• Version mgmt / Upgrading: https://github.com/open-cluster-management-io/clusteradm/issues/121

  • [x] https://github.com/open-cluster-management-io/clusteradm/pull/119

• Proxy / tunneling: https://github.com/open-cluster-management-io/clusteradm/issues/88

  • [ ] proxy health: https://github.com/open-cluster-management-io/clusteradm/pull/90
  • [ ] proxy tunnel: (creating tunnels for kubectl-access to the managed clusters)
  • create
  • connect
  • delete
  • [ ] proxy stats: (collecting stats such as in-use bandwidth, connection counts, etc.)
  • [ ] proxy bench: (test the estimated maximum bandwidth & latency thru the tunnels)

• Addon management:

  • [x] enable/disable: https://github.com/open-cluster-management-io/clusteradm/pull/101

• Miscs:

  • [ ] prompt warning if running join command against hub cluster
  • [ ] prompt warning if running "hub" oriented commands against managed cluster
  • [ ] unjoin cluster: (removing registered managed clusters from the hub neatly)

• Manifest work:

  • [x] create from static yaml files: https://github.com/open-cluster-management-io/clusteradm/pull/134

• Testing: (covering all the new sub-commands above w/ e2e tests)

[qiujian16]

maybe also add create/delete work command?