:Alert rule reference

Alert name

Expression

Data collection period (minutes)

Alert trigger condition

PodCpu75

100 * (sum(rate(container_cpu_usage_seconds_total[1m])) by (pod_name) / sum(label_replace(kube_pod_container_resource_limits_cpu_cores, "pod_name", "$1", "pod", "(.*)")) by (pod_name))>75

7

The CPU usage of the pod is greater than 75%.

PodMemory75

100 * (sum(container_memory_working_set_bytes) by (pod_name) / sum(label_replace(kube_pod_container_resource_limits_memory_bytes, "pod_name", "$1", "pod", "(.*)")) by (pod_name))>75

5

The memory usage of the pod is greater than 75%.

pod_status_no_running

sum (kube_pod_status_phase{phase!="Running"}) by (pod,phase)

5

The pod is not in the Running state.

PodMem4GbRestart

(sum (container_memory_working_set_bytes{id!="/"})by (pod_name,container_name) /1024/1024/1024)>4

5

The memory usage of the pod is greater than 4 GB.

PodRestart

sum (increase (kube_pod_container_status_restarts_total{}[2m])) by (namespace,pod) >0

5

The pod restarts.

Alert name

Expression

Data collection period (minutes)

Alert trigger condition

KubeStateMetricsListErrors

(sum(rate(kube_state_metrics_list_total{job="kube-state-metrics",result="error"}[5m])) / sum(rate(kube_state_metrics_list_total{job="kube-state-metrics"}[5m]))) > 0.01

15

An error occurs in the metric list.

KubeStateMetricsWatchErrors

(sum(rate(kube_state_metrics_watch_total{job="kube-state-metrics",result="error"}[5m])) / sum(rate(kube_state_metrics_watch_total{job="kube-state-metrics"}[5m]))) > 0.01

15

An error occurs in the metric watch.

NodeFilesystemAlmostOutOfSpace

( node_filesystem_avail_bytes{job="node-exporter",fstype!=""} / node_filesystem_size_bytes{job="node-exporter",fstype!=""} * 100 < 5 and node_filesystem_readonly{job="node-exporter",fstype!=""} == 0 )

60

The node file system is almost out of space.

NodeFilesystemSpaceFillingUp

( node_filesystem_avail_bytes{job="node-exporter",fstype!=""} / node_filesystem_size_bytes{job="node-exporter",fstype!=""} * 100 < 40 and predict_linear(node_filesystem_avail_bytes{job="node-exporter",fstype!=""}[6h], 24*60*60) < 0 and node_filesystem_readonly{job="node-exporter",fstype!=""} == 0 )

60

The node file system is running out of space.

NodeFilesystemFilesFillingUp

( node_filesystem_files_free{job="node-exporter",fstype!=""} / node_filesystem_files{job="node-exporter",fstype!=""} * 100 < 40 and predict_linear(node_filesystem_files_free{job="node-exporter",fstype!=""}[6h], 24*60*60) < 0 and node_filesystem_readonly{job="node-exporter",fstype!=""} == 0 )

60

The node file system is running out of inodes.

NodeFilesystemAlmostOutOfFiles

( node_filesystem_files_free{job="node-exporter",fstype!=""} / node_filesystem_files{job="node-exporter",fstype!=""} * 100 < 3 and node_filesystem_readonly{job="node-exporter",fstype!=""} == 0 )

60

The node file system is almost out of inodes.

NodeNetworkReceiveErrs

increase(node_network_receive_errs_total[2m]) > 10

60

An error occurs when the node receives network packets.

NodeNetworkTransmitErrs

increase(node_network_transmit_errs_total[2m]) > 10

60

An error occurs when the node transmits network packets.

NodeHighNumberConntrackEntriesUsed

(node_nf_conntrack_entries / node_nf_conntrack_entries_limit) > 0.75

None

A high number of conntrack entries are used.

NodeClockSkewDetected

( node_timex_offset_seconds > 0.05 and deriv(node_timex_offset_seconds[5m]) >= 0 ) or ( node_timex_offset_seconds < -0.05 and deriv(node_timex_offset_seconds[5m]) <= 0 )

10

Clock skew is detected.

NodeClockNotSynchronising

min_over_time(node_timex_sync_status[5m]) == 0

10

The system time is out of sync.

KubePodCrashLooping

rate(kube_pod_container_status_restarts_total{job="kube-state-metrics"}[15m]) * 60 * 5 > 0

15

The pod is in a crash loop.

KubePodNotReady

sum by (namespace, pod) (max by(namespace, pod) (kube_pod_status_phase{job="kube-state-metrics", phase=~"Pending|Unknown"}) * on(namespace, pod) group_left(owner_kind) max by(namespace, pod, owner_kind) (kube_pod_owner{owner_kind!="Job"})) > 0

15

The pod is not ready.

KubeDeploymentGenerationMismatch

kube_deployment_status_observed_generation{job="kube-state-metrics"} != kube_deployment_metadata_generation{job="kube-state-metrics"}

15

A deployment generation mismatch occurs.

KubeDeploymentReplicasMismatch

( kube_deployment_spec_replicas{job="kube-state-metrics"} != kube_deployment_status_replicas_available{job="kube-state-metrics"} ) and ( changes(kube_deployment_status_replicas_updated{job="kube-state-metrics"}[5m]) == 0 )

15

A deployment replica mismatch occurs.

KubeStatefulSetReplicasMismatch

( kube_statefulset_status_replicas_ready{job="kube-state-metrics"} != kube_statefulset_status_replicas{job="kube-state-metrics"} ) and ( changes(kube_statefulset_status_replicas_updated{job="kube-state-metrics"}[5m]) == 0 )

15

A StatefulSet replica mismatch occurs.

KubeStatefulSetGenerationMismatch

kube_statefulset_status_observed_generation{job="kube-state-metrics"} != kube_statefulset_metadata_generation{job="kube-state-metrics"}

15

A StatefulSet generation mismatch occurs.

KubeStatefulSetUpdateNotRolledOut

max without (revision) ( kube_statefulset_status_current_revision{job="kube-state-metrics"} unless kube_statefulset_status_update_revision{job="kube-state-metrics"} ) * ( kube_statefulset_replicas{job="kube-state-metrics"} != kube_statefulset_status_replicas_updated{job="kube-state-metrics"} )

15

The StatefulSet update is not rolled out.

KubeDaemonSetRolloutStuck

kube_daemonset_status_number_ready{job="kube-state-metrics"} / kube_daemonset_status_desired_number_scheduled{job="kube-state-metrics"} < 1.00

15

DaemonSet exit backoff

KubeContainerWaiting

sum by (namespace, pod, container) (kube_pod_container_status_waiting_reason{job="kube-state-metrics"}) > 0

60

The container is in the Waiting state.

KubeDaemonSetNotScheduled

kube_daemonset_status_desired_number_scheduled{job="kube-state-metrics"} - kube_daemonset_status_current_number_scheduled{job="kube-state-metrics"} > 0

10

The DaemonSet is not scheduled.

KubeDaemonSetMisScheduled

kube_daemonset_status_number_misscheduled{job="kube-state-metrics"} > 0

15

The daemon plan is missing.

KubeCronJobRunning

time() - kube_cronjob_next_schedule_time{job="kube-state-metrics"} > 3600

60

If the Cron job runs for longer than 1 hour.

KubeJobCompletion

kube_job_spec_completions{job="kube-state-metrics"} - kube_job_status_succeeded{job="kube-state-metrics"} > 0

60

The task is complete.

KubeJobFailed

kube_job_failed{job="kube-state-metrics"} > 0

15

The Job failed.

KubeHpaReplicasMismatch

(kube_hpa_status_desired_replicas{job="kube-state-metrics"} != kube_hpa_status_current_replicas{job="kube-state-metrics"}) and changes(kube_hpa_status_current_replicas[15m]) == 0

15

An HPA replica mismatch occurs.

KubeHpaMaxedOut

kube_hpa_status_current_replicas{job="kube-state-metrics"} == kube_hpa_spec_max_replicas{job="kube-state-metrics"}

15

The number of HPA replicas reaches the maximum.

KubeCPUOvercommit

sum(namespace:kube_pod_container_resource_requests_cpu_cores:sum{}) / sum(kube_node_status_allocatable_cpu_cores) > (count(kube_node_status_allocatable_cpu_cores)-1) / count(kube_node_status_allocatable_cpu_cores)

5

CPU is overcommitted.

KubeMemoryOvercommit

sum(namespace:kube_pod_container_resource_requests_memory_bytes:sum{}) / sum(kube_node_status_allocatable_memory_bytes) > (count(kube_node_status_allocatable_memory_bytes)-1) / count(kube_node_status_allocatable_memory_bytes)

5

Memory is overcommitted.

KubeCPUQuotaOvercommit

sum(kube_resourcequota{job="kube-state-metrics", type="hard", resource="cpu"}) / sum(kube_node_status_allocatable_cpu_cores) > 1.5

5

CPU quota is overcommitted.

KubeMemoryQuotaOvercommit

sum(kube_resourcequota{job="kube-state-metrics", type="hard", resource="memory"}) / sum(kube_node_status_allocatable_memory_bytes{job="node-exporter"}) > 1.5

5

Memory quota is overcommitted.

KubeQuotaExceeded

kube_resourcequota{job="kube-state-metrics", type="used"} / ignoring(instance, job, type) (kube_resourcequota{job="kube-state-metrics", type="hard"} > 0) > 0.90

15

The quota has been exceeded.

CPUThrottlingHigh

sum(increase(container_cpu_cfs_throttled_periods_total{container!="", }[5m])) by (container, pod, namespace) / sum(increase(container_cpu_cfs_periods_total{}[5m])) by (container, pod, namespace) > ( 25 / 100 )

15

The CPU is overheating.

KubePersistentVolumeFillingUp

kubelet_volume_stats_available_bytes{job="kubelet", metrics_path="/metrics"} / kubelet_volume_stats_capacity_bytes{job="kubelet", metrics_path="/metrics"} < 0.03

1

The persistent volume is running out of space.

KubePersistentVolumeErrors

kube_persistentvolume_status_phase{phase=~"Failed|Pending",job="kube-state-metrics"} > 0

5

Invalid storage volume capacity.

KubeVersionMismatch

count(count by (gitVersion) (label_replace(kubernetes_build_info{job!~"kube-dns|coredns"},"gitVersion","$1","gitVersion","(v[0-9]*.[0-9]*.[0-9]*).*"))) > 1

15

A version mismatch occurs.

KubeClientErrors

(sum(rate(rest_client_requests_total{code=~"5.."}[5m])) by (instance, job) / sum(rate(rest_client_requests_total[5m])) by (instance, job)) > 0.01

15

A client error occurs.

KubeAPIErrorBudgetBurn

sum(apiserver_request:burnrate1h) > (14.40 * 0.01000) and sum(apiserver_request:burnrate5m) > (14.40 * 0.01000)

2

High API error rate.

KubeAPILatencyHigh

( cluster:apiserver_request_duration_seconds:mean5m{job="apiserver"} > on (verb) group_left() ( avg by (verb) (cluster:apiserver_request_duration_seconds:mean5m{job="apiserver"} >= 0) + 2*stddev by (verb) (cluster:apiserver_request_duration_seconds:mean5m{job="apiserver"} >= 0) ) ) > on (verb) group_left() 1.2 * avg by (verb) (cluster:apiserver_request_duration_seconds:mean5m{job="apiserver"} >= 0) and on (verb,resource) cluster_quantile:apiserver_request_duration_seconds:histogram_quantile{job="apiserver",quantile="0.99"} > 1

5

API latency is high.

KubeAPIErrorsHigh

sum(rate(apiserver_request_total{job="apiserver",code=~"5.."}[5m])) by (resource,subresource,verb) / sum(rate(apiserver_request_total{job="apiserver"}[5m])) by (resource,subresource,verb) > 0.05

10

The API error rate is high.

KubeClientCertificateExpiration

apiserver_client_certificate_expiration_seconds_count{job="apiserver"} > 0 and on(job) histogram_quantile(0.01, sum by (job, le) (rate(apiserver_client_certificate_expiration_seconds_bucket{job="apiserver"}[5m]))) < 604800

None

The client authentication has expired.

AggregatedAPIErrors

sum by(name, namespace)(increase(aggregator_unavailable_apiservice_count[5m])) > 2

None

An error occurs in the aggregated API.

AggregatedAPIDown

sum by(name, namespace)(sum_over_time(aggregator_unavailable_apiservice[5m])) > 0

5

The aggregated API is down.

KubeAPIDown

absent(up{job="apiserver"} == 1)

15

Unpublishing an API.

KubeNodeNotReady

kube_node_status_condition{job="kube-state-metrics",condition="Ready",status="true"} == 0

15

The node is not ready.

KubeNodeUnreachable

kube_node_spec_taint{job="kube-state-metrics",key="node.kubernetes.io/unreachable",effect="NoSchedule"} == 1

2

The node is unreachable.

KubeletTooManyPods

max(max(kubelet_running_pod_count{job="kubelet", metrics_path="/metrics"}) by(instance) * on(instance) group_left(node) kubelet_node_name{job="kubelet", metrics_path="/metrics"}) by(node) / max(kube_node_status_capacity_pods{job="kube-state-metrics"} != 1) by(node) > 0.95

15

There are too many Pods.

KubeNodeReadinessFlapping

sum(changes(kube_node_status_condition{status="true",condition="Ready"}[15m])) by (node) > 2

15

The node readiness status is flapping.

KubeletPlegDurationHigh

node_quantile:kubelet_pleg_relist_duration_seconds:histogram_quantile{quantile="0.99"} >= 10

5

The PLEG duration is high.

KubeletPodStartUpLatencyHigh

histogram_quantile(0.99, sum(rate(kubelet_pod_worker_duration_seconds_bucket{job="kubelet", metrics_path="/metrics"}[5m])) by (instance, le)) * on(instance) group_left(node) kubelet_node_name{job="kubelet", metrics_path="/metrics"} > 60

15

Pod startup latency is high.

KubeletDown

absent(up{job="kubelet", metrics_path="/metrics"} == 1)

15

The kubelet is down.

KubeSchedulerDown

absent(up{job="kube-scheduler"} == 1)

15

Kubelet scheduling is deprecated.

KubeControllerManagerDown

absent(up{job="kube-controller-manager"} == 1)

15

The kube-controller-manager is down.

TargetDown

100 * (count(up == 0) BY (job, namespace, service) / count(up) BY (job, namespace, service)) > 10

10

The target is down.

NodeNetworkInterfaceFlapping

changes(node_network_up{job="node-exporter",device!~"veth.+"}[2m]) > 2

2

The network interface status is flapping.

Alert name

Expression

Data collection period (minutes)

Alert trigger condition

MongodbReplicationLag

avg(mongodb_replset_member_optime_date{state="PRIMARY"}) - avg(mongodb_replset_member_optime_date{state="SECONDARY"}) > 10

5

Replication lag is too high.

MongodbReplicationHeadroom

(avg(mongodb_replset_oplog_tail_timestamp - mongodb_replset_oplog_head_timestamp) - (avg(mongodb_replset_member_optime_date{state="PRIMARY"}) - avg(mongodb_replset_member_optime_date{state="SECONDARY"}))) <= 0

5

Replication headroom is insufficient.

MongodbReplicationStatus3

mongodb_replset_member_state == 3

5

The replication state is 3.

MongodbReplicationStatus6

mongodb_replset_member_state == 6

5

The replication state is 6.

MongodbReplicationStatus8

mongodb_replset_member_state == 8

5

The replication state is 8.

MongodbReplicationStatus10

mongodb_replset_member_state == 10

5

The replication state is 10.

MongodbNumberCursorsOpen

mongodb_metrics_cursor_open{state="total_open"} > 10000

5

Too many cursors are open.

MongodbCursorsTimeouts

sum (increase increase(mongodb_metrics_cursor_timed_out_total[10m]) > 100

5

Cursors are timing out.

MongodbTooManyConnections

mongodb_connections{state="current"} > 500

5

Too many connections.

MongodbVirtualMemoryUsage

(sum(mongodb_memory{type="virtual"}) BY (ip) / sum(mongodb_memory{type="mapped"}) BY (ip)) > 3

5

Virtual memory usage is high.

Alert name

Expression

Data collection period (minutes)

Alert trigger condition

MySQL is down

mysql_up == 0

1

MySQL is down.

open files high

mysql_global_status_innodb_num_open_files > (mysql_global_variables_open_files_limit) * 0.75

1

The number of open files is high.

Read buffer size is bigger than max. allowed packet size

mysql_global_variables_read_buffer_size > mysql_global_variables_slave_max_allowed_packet

1

The read buffer size is larger than the maximum allowed packet size.

Sort buffer possibly missconfigured

mysql_global_variables_innodb_sort_buffer_size <256*1024 or mysql_global_variables_read_buffer_size > 4*1024*1024

1

The sort buffer may be misconfigured.

Thread stack size is too small

mysql_global_variables_thread_stack <196608

1

The thread stack size is too small.

Used more than 80% of max connections limited

mysql_global_status_max_used_connections > mysql_global_variables_max_connections * 0.8

1

More than 80% of the maximum allowed connections are used.

InnoDB Force Recovery is enabled

mysql_global_variables_innodb_force_recovery != 0

1

You can enable forced recovery.

InnoDB Log File size is too small

mysql_global_variables_innodb_log_file_size < 16777216

1

The InnoDB log file size is too small.

InnoDB Flush Log at Transaction Commit

mysql_global_variables_innodb_flush_log_at_trx_commit != 1

1

A transaction commit flushes the log.

Table definition cache too small

mysql_global_status_open_table_definitions > mysql_global_variables_table_definition_cache

1

The table definition cache is too small.

Table open cache too small

mysql_global_status_open_tables >mysql_global_variables_table_open_cache * 99/100

1

The table open cache is too small.

Thread stack size is possibly too small

mysql_global_variables_thread_stack < 262144

1

The thread stack size may be too small.

InnoDB Buffer Pool Instances is too small

mysql_global_variables_innodb_buffer_pool_instances == 1

1

The number of InnoDB buffer pool instances is too small.

InnoDB Plugin is enabled

mysql_global_variables_ignore_builtin_innodb == 1

1

The plugin has been enabled.

Binary Log is disabled

mysql_global_variables_log_bin != 1

1

The binary log is disabled.

Binlog Cache size too small

mysql_global_variables_binlog_cache_size < 1048576

1

The binary log cache size is too small.

Binlog Statement Cache size too small

mysql_global_variables_binlog_stmt_cache_size <1048576 and mysql_global_variables_binlog_stmt_cache_size > 0

1

The binary log statement cache size is too small.

Binlog Transaction Cache size too small

mysql_global_variables_binlog_cache_size <1048576

1

The transaction cache is too small.

Sync Binlog is enabled

mysql_global_variables_sync_binlog == 1

1

Binary logging is enabled.

IO thread stopped

mysql_slave_status_slave_io_running != 1

1

The I/O thread is stopped.

SQL thread stopped

mysql_slave_status_slave_sql_running == 0

1

The SQL thread is stopped.

Mysql_Too_Many_Connections

rate(mysql_global_status_threads_connected[5m])>200

5

Too many connections.

Mysql_Too_Many_slow_queries

rate(mysql_global_status_slow_queries[5m])>3

5

Too many slow queries.

Slave lagging behind Master

rate(mysql_slave_status_seconds_behind_master[1m]) >30

1

The slave is lagging behind the master.

Slave is NOT read only(Please ignore this warning indicator.)

mysql_global_variables_read_only != 0

1

The secondary permission is not a read-only permission.

Alert name

Expression

Data collection period (minutes)

Alert trigger condition

NginxHighHttp4xxErrorRate

sum(rate(nginx_http_requests_total{status=~"^4.."}[1m])) / sum(rate(nginx_http_requests_total[1m])) * 100 > 5

5

The HTTP 4xx error rate is high.

NginxHighHttp5xxErrorRate

sum(rate(nginx_http_requests_total{status=~"^5.."}[1m])) / sum(rate(nginx_http_requests_total[1m])) * 100 > 5

5

The HTTP 5xx error rate is high.

NginxLatencyHigh

histogram_quantile(0.99, sum(rate(nginx_http_request_duration_seconds_bucket[30m])) by (host, node)) > 10

5

Latency is high.

Alert name

Expression

Data collection period (minutes)

Alert trigger condition

RedisDown

redis_up == 0

5

Redis is down.

RedisMissingMaster

count(redis_instance_info{role="master"}) == 0

5

A master is missing.

RedisTooManyMasters

count(redis_instance_info{role="master"}) > 1

5

There is more than one master.

RedisDisconnectedSlaves

count without (instance, job) (redis_connected_slaves) - sum without (instance, job) (redis_connected_slaves) - 1 > 1

5

A slave is disconnected.

RedisReplicationBroken

delta(redis_connected_slaves[1m]) < 0

5

Replication is interrupted.

RedisClusterFlapping

changes(redis_connected_slaves[5m]) > 2

5

Monitors the replica connection for changes.

RedisMissingBackup

time() - redis_rdb_last_save_timestamp_seconds > 60 * 60 * 24

5

The backup was interrupted.

RedisOutOfMemory

redis_memory_used_bytes / redis_total_system_memory_bytes * 100 > 90

5

Out of memory.

RedisTooManyConnections

redis_connected_clients > 100

5

Too many connections.

RedisNotEnoughConnections

redis_connected_clients < 5

5

Not enough connections.

RedisRejectedConnections

increase(redis_rejected_connections_total[1m]) > 0

5

Connections are being rejected.