dr-autosync: add metrics (#7110)

[ti-chi-bot]

This is an automated cherry-pick of #7110

What problem does this PR solve?

Issue Number: Close #6975

What is changed and how does it work?

add some dr-autosync related metrics

numbers are used to distinguish different states, the map is

1: sync
2: async_wait
3: async
4: sync_recover

Check List

Tests

• Manual test (add detailed scripts or steps below)

sync state

# HELP pd_replication_dr_recover_progress Progress of sync_recover process
# TYPE pd_replication_dr_recover_progress gauge
pd_replication_dr_recover_progress 0
# HELP pd_replication_dr_recovered_region Number of recovered regions
# TYPE pd_replication_dr_recovered_region gauge
pd_replication_dr_recovered_region 0
# HELP pd_replication_dr_state State of DR
# TYPE pd_replication_dr_state gauge
pd_replication_dr_state 1
# HELP pd_replication_dr_state_id State ID of DR
# TYPE pd_replication_dr_state_id gauge
pd_replication_dr_state_id 10
# HELP pd_replication_dr_tick_total Counter of background state check count
# TYPE pd_replication_dr_tick_total counter
pd_replication_dr_tick_total 64

async wait

# HELP pd_replication_dr_recover_progress Progress of sync_recover process
# TYPE pd_replication_dr_recover_progress gauge
pd_replication_dr_recover_progress 0
# HELP pd_replication_dr_recovered_region Number of recovered regions
# TYPE pd_replication_dr_recovered_region gauge
pd_replication_dr_recovered_region 0
# HELP pd_replication_dr_state State of DR
# TYPE pd_replication_dr_state gauge
pd_replication_dr_state 2
# HELP pd_replication_dr_state_id State ID of DR
# TYPE pd_replication_dr_state_id gauge
pd_replication_dr_state_id 221
# HELP pd_replication_dr_tick_total Counter of background state check count
# TYPE pd_replication_dr_tick_total counter
pd_replication_dr_tick_total 311

async

# HELP pd_replication_dr_recover_progress Progress of sync_recover process
# TYPE pd_replication_dr_recover_progress gauge
pd_replication_dr_recover_progress 0
# HELP pd_replication_dr_recovered_region Number of recovered regions
# TYPE pd_replication_dr_recovered_region gauge
pd_replication_dr_recovered_region 0
# HELP pd_replication_dr_state State of DR
# TYPE pd_replication_dr_state gauge
pd_replication_dr_state 3
# HELP pd_replication_dr_state_id State ID of DR
# TYPE pd_replication_dr_state_id gauge
pd_replication_dr_state_id 222
# HELP pd_replication_dr_tick_total Counter of background state check count
# TYPE pd_replication_dr_tick_total counter
pd_replication_dr_tick_total 385

sync recover

# HELP pd_replication_dr_recover_progress Progress of sync_recover process
# TYPE pd_replication_dr_recover_progress gauge
pd_replication_dr_recover_progress 0.24528302252292633
# HELP pd_replication_dr_recovered_region Number of recovered regions
# TYPE pd_replication_dr_recovered_region gauge
pd_replication_dr_recovered_region 0
# HELP pd_replication_dr_state State of DR
# TYPE pd_replication_dr_state gauge
pd_replication_dr_state 4
# HELP pd_replication_dr_state_id State ID of DR
# TYPE pd_replication_dr_state_id gauge
pd_replication_dr_state_id 223
# HELP pd_replication_dr_tick_total Counter of background state check count
# TYPE pd_replication_dr_tick_total counter
pd_replication_dr_tick_total 393

sync

# HELP pd_replication_dr_recover_progress Progress of sync_recover process
# TYPE pd_replication_dr_recover_progress gauge
pd_replication_dr_recover_progress 1
# HELP pd_replication_dr_recovered_region Number of recovered regions
# TYPE pd_replication_dr_recovered_region gauge
pd_replication_dr_recovered_region 53
# HELP pd_replication_dr_state State of DR
# TYPE pd_replication_dr_state gauge
pd_replication_dr_state 1
# HELP pd_replication_dr_state_id State ID of DR
# TYPE pd_replication_dr_state_id gauge
pd_replication_dr_state_id 224
# HELP pd_replication_dr_tick_total Counter of background state check count
# TYPE pd_replication_dr_tick_total counter
pd_replication_dr_tick_total 614

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lhy1024

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[ti-chi-bot]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

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[ti-chi-bot]

@ti-chi-bot: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
idc-jenkins-ci/build	3c6532b	link	true	/test build

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[TonsnakeLin]

Could you please resolve the cp conflict? @disksing

[lhy1024]

but need to fix conflict

[ti-chi-bot]

PR needs rebase.

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