Enable prometheus metrics for katib-controller

[hougangliu]

Upgrade controller-runtime to 0.1.9 and enable prometheus metrics for katib-controller

# curl http://10.0.149.224:8080/metrics
...
# TYPE go_memstats_next_gc_bytes gauge
go_memstats_next_gc_bytes 1.8476192e+07
# HELP go_memstats_other_sys_bytes Number of bytes used for other system allocations.
# TYPE go_memstats_other_sys_bytes gauge
go_memstats_other_sys_bytes 1.819165e+06
# HELP go_memstats_stack_inuse_bytes Number of bytes in use by the stack allocator.
# TYPE go_memstats_stack_inuse_bytes gauge
go_memstats_stack_inuse_bytes 1.671168e+06
# HELP go_memstats_stack_sys_bytes Number of bytes obtained from system for stack allocator.
# TYPE go_memstats_stack_sys_bytes gauge
go_memstats_stack_sys_bytes 1.671168e+06
# HELP go_memstats_sys_bytes Number of bytes obtained from system.
# TYPE go_memstats_sys_bytes gauge
go_memstats_sys_bytes 7.3072888e+07
# HELP go_threads Number of OS threads created.
# TYPE go_threads gauge
go_threads 21
# HELP process_cpu_seconds_total Total user and system CPU time spent in seconds.
# TYPE process_cpu_seconds_total counter
process_cpu_seconds_total 5.09
# HELP process_max_fds Maximum number of open file descriptors.
# TYPE process_max_fds gauge
process_max_fds 1.048576e+06
# HELP process_open_fds Number of open file descriptors.
# TYPE process_open_fds gauge
process_open_fds 12
# HELP process_resident_memory_bytes Resident memory size in bytes.
# TYPE process_resident_memory_bytes gauge
process_resident_memory_bytes 4.6043136e+07
# HELP process_start_time_seconds Start time of the process since unix epoch in seconds.
# TYPE process_start_time_seconds gauge
process_start_time_seconds 1.56568718538e+09
# HELP process_virtual_memory_bytes Virtual memory size in bytes.
# TYPE process_virtual_memory_bytes gauge
process_virtual_memory_bytes 1.41164544e+08
# HELP process_virtual_memory_max_bytes Maximum amount of virtual memory available in bytes.
# TYPE process_virtual_memory_max_bytes gauge
process_virtual_memory_max_bytes -1
...

---

This change is 

[johnugeorge]

Don't we need katib specific metrics to be exposed?

[hougangliu]

Don't we need katib specific metrics to be exposed?

This PR only exposes controller-runtime default metrics for controller. I will submit other PRs for experiments/trials etc.

[hougangliu]

/test kubeflow-katib-presubmit

[hougangliu]

/test kubeflow-katib-presubmit

[hougangliu]

/cc @gaocegege @johnugeorge

[gaocegege]

/lgtm
/retest

[johnugeorge]

/lgtm

[johnugeorge]

/approve

[johnugeorge]

/retest

[johnugeorge]

/retest

[hougangliu]

/test kubeflow-katib-presubmit

[johnugeorge]

/retest

[hougangliu]

/test kubeflow-katib-presubmit

[johnugeorge]

/retest

[hougangliu]

/test kubeflow-katib-presubmit

[hougangliu]

/test kubeflow-katib-presubmit

[gaocegege]

/test kubeflow-katib-presubmit

[hougangliu]

Disable UI build so that the build error will not block katib CI.
@andreyvelich will be back to fix #699

[hougangliu]

/test kubeflow-katib-presubmit

[gaocegege]

/retest

[hougangliu]

/retest

[hougangliu]

/retest

[hougangliu]

/retest

[johnugeorge]

/lgtm

[johnugeorge]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: johnugeorge

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 [johnugeorge]

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