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默认的 NC 配置是自动生成的，需要怎么修改，达到屏蔽一般告警，只接接收危险告警和重要告警的需求。
[root@silkdo-base-01 ~]# kubectl get nc
No resources found
[root@silkdo-base-01 ~]#
[root@silkdo-base-01 ~]# kubectl -n kubesphere-monitoring-system get secrets alertmanager-main-generated -o json | jq -r '.data."alertmanager.yaml"' | base64 -d
"global":
"resolve_timeout": "5m"
"inhibit_rules":
- "equal":
- "namespace"
- "alertname"
"source_match":
"severity": "critical"
"target_match_re":
"severity": "warning|info"
- "equal":
- "namespace"
- "alertname"
"source_match":
"severity": "warning"
"target_match_re":
"severity": "info"
- "equal":
- "namespace"
"source_matchers":
- "alertname = InfoInhibitor"
"target_matchers":
- "severity = info"
"receivers":
- "name": "Default"
- "name": "null"
- "name": "Watchdog"
- "name": "prometheus"
"webhook_configs":
- "url": "http://notification-manager-svc.kubesphere-monitoring-system.svc:19093/api/v2/alerts"
- "name": "event"
"webhook_configs":
- "send_resolved": false
"url": "http://notification-manager-svc.kubesphere-monitoring-system.svc:19093/api/v2/alerts"
- "name": "auditing"
"webhook_configs":
- "send_resolved": false
"url": "http://notification-manager-svc.kubesphere-monitoring-system.svc:19093/api/v2/alerts"
"route":
"group_by":
- "namespace"
- "alertname"
- "rule_id"
"group_interval": "5m"
"group_wait": "30s"
"receiver": "Default"
"repeat_interval": "12h"
"routes":
- "match":
"alertname": "Watchdog"
"receiver": "Watchdog"
- "matchers":
- "alertname = InfoInhibitor"
"receiver": "null"
- "group_interval": "30s"
"match":
"alerttype": "event"
"receiver": "event"
- "group_interval": "30s"
"match":
"alerttype": "auditing"
"receiver": "auditing"
- "match_re":
"alerttype": ".*"
"receiver": "prometheus"