job "${job_name}" { # The "region" parameter specifies the region in which to execute the job. # If omitted, this inherits the default region name of "global". # region = "global" # # The "datacenters" parameter specifies the list of datacenters which should # be considered when placing this task. This must be provided. datacenters = "${datacenters}" # The "type" parameter controls the type of job, which impacts the scheduler's # decision on placement. This configuration is optional and defaults to # "service". For a full list of job types and their differences, please see # the online documentation. # # For more information, please see the online documentation at: # # https://www.nomadproject.io/docs/jobspec/schedulers # type = "service" update { # The "max_parallel" parameter specifies the maximum number of updates to # perform in parallel. In this case, this specifies to update a single task # at a time. max_parallel = 1 health_check = "checks" # The "min_healthy_time" parameter specifies the minimum time the allocation # must be in the healthy state before it is marked as healthy and unblocks # further allocations from being updated. min_healthy_time = "10s" # The "healthy_deadline" parameter specifies the deadline in which the # allocation must be marked as healthy after which the allocation is # automatically transitioned to unhealthy. Transitioning to unhealthy will # fail the deployment and potentially roll back the job if "auto_revert" is # set to true. healthy_deadline = "3m" # The "progress_deadline" parameter specifies the deadline in which an # allocation must be marked as healthy. The deadline begins when the first # allocation for the deployment is created and is reset whenever an allocation # as part of the deployment transitions to a healthy state. If no allocation # transitions to the healthy state before the progress deadline, the # deployment is marked as failed. progress_deadline = "10m" %{ if use_canary } # The "canary" parameter specifies that changes to the job that would result # in destructive updates should create the specified number of canaries # without stopping any previous allocations. Once the operator determines the # canaries are healthy, they can be promoted which unblocks a rolling update # of the remaining allocations at a rate of "max_parallel". # # Further, setting "canary" equal to the count of the task group allows # blue/green deployments. When the job is updated, a full set of the new # version is deployed and upon promotion the old version is stopped. canary = 1 # Specifies if the job should auto-promote to the canary version when all # canaries become healthy during a deployment. Defaults to false which means # canaries must be manually updated with the nomad deployment promote # command. auto_promote = true # The "auto_revert" parameter specifies if the job should auto-revert to the # last stable job on deployment failure. A job is marked as stable if all the # allocations as part of its deployment were marked healthy. auto_revert = true %{ endif } } # The "group" stanza defines a series of tasks that should be co-located on # the same Nomad client. Any task within a group will be placed on the same # client. # # For more information and examples on the "group" stanza, please see # the online documentation at: # # https://www.nomadproject.io/docs/job-specification/group # group "prod-group1-${service_name}" { # The "count" parameter specifies the number of the task groups that should # be running under this group. This value must be non-negative and defaults # to 1. count = ${group_count} # The volume stanza allows the group to specify that it requires a given # volume from the cluster. # # For more information and examples on the "volume" stanza, please see # the online documentation at: # # https://www.nomadproject.io/docs/job-specification/volume # %{ if use_host_volume } volume "prod-volume1-${service_name}" { type = "host" read_only = false source = "${host_volume}" } %{ endif } # The constraint allows restricting the set of eligible nodes. Constraints # may filter on attributes or client metadata. # # For more information and examples on the "volume" stanza, please see # the online documentation at: # # https://www.nomadproject.io/docs/job-specification/constraint # constraint { attribute = "$${attr.cpu.arch}" operator = "!=" value = "arm64" } # The "task" stanza creates an individual unit of work, such as a Docker # container, web application, or batch processing. # # For more information and examples on the "task" stanza, please see # the online documentation at: # # https://www.nomadproject.io/docs/job-specification/task # task "prod-task1-${service_name}" { # The "driver" parameter specifies the task driver that should be used to # run the task. driver = "exec" %{ if use_host_volume } volume_mount { volume = "prod-volume1-${service_name}" destination = "${data_dir}" read_only = false } %{ endif } %{ if use_vault_provider } vault { policies = "${vault_kv_policy_name}" } %{ endif } # The "config" stanza specifies the driver configuration, which is passed # directly to the driver to start the task. The details of configurations # are specific to each driver, so please see specific driver # documentation for more information. config { command = "local/prometheus-${version}.linux-amd64/prometheus" args = [ "--config.file=secrets/prometheus.yml", "--storage.tsdb.path=${data_dir}prometheus/", "--storage.tsdb.retention.time=15d" ] } # The artifact stanza instructs Nomad to fetch and unpack a remote resource, # such as a file, tarball, or binary. Nomad downloads artifacts using the # popular go-getter library, which permits downloading artifacts from a # variety of locations using a URL as the input source. # # For more information and examples on the "artifact" stanza, please see # the online documentation at: # # https://www.nomadproject.io/docs/job-specification/artifact # artifact { source = "${url}" } # The "template" stanza instructs Nomad to manage a template, such as # a configuration file or script. This template can optionally pull data # from Consul or Vault to populate runtime configuration data. # # For more information and examples on the "template" stanza, please see # the online documentation at: # # https://www.nomadproject.io/docs/job-specification/template # template { change_mode = "noop" change_signal = "SIGINT" destination = "secrets/alerts.yml" left_delimiter = "{{{" right_delimiter = "}}}" data = < 80 for: 0m labels: severity: warning annotations: summary: "Host high CPU load (instance {{ $labels.instance }})." description: "CPU load is > 80%." - alert: HostOutOfMemory expr: node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes * 100 < 10 for: 2m labels: severity: warning annotations: summary: "Host out of memory (instance {{ $labels.instance }})." description: "Node memory is filling up (< 10% left)." - alert: HostOomKillDetected expr: increase(node_vmstat_oom_kill[1m]) > 0 for: 0m labels: severity: warning annotations: summary: "Host OOM kill detected (instance {{ $labels.instance }})." description: "OOM kill detected." - alert: HostMemoryUnderMemoryPressure expr: rate(node_vmstat_pgmajfault[1m]) > 1000 for: 2m labels: severity: warning annotations: summary: "Host memory under memory pressure (instance {{ $labels.instance }})." description: "The node is under heavy memory pressure. High rate of major page faults." - alert: HostOutOfDiskSpace expr: (node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and ON (instance, device, mountpoint) node_filesystem_readonly == 0 for: 2m labels: severity: warning annotations: summary: "Host out of disk space (instance {{ $labels.instance }})." description: "Disk is almost full (< 10% left)." - alert: HostRaidDiskFailure expr: node_md_disks{state="failed"} > 0 for: 2m labels: severity: warning annotations: summary: "Host RAID disk failure (instance {{ $labels.instance }})." description: "At least one device in RAID array on {{ $labels.instance }} failed. Array {{ $labels.md_device }} needs attention and possibly a disk swap." - alert: HostConntrackLimit expr: node_nf_conntrack_entries / node_nf_conntrack_entries_limit > 0.8 for: 5m labels: severity: warning annotations: summary: "Host conntrack limit (instance {{ $labels.instance }})." description: "The number of conntrack is approching limit." - alert: HostNetworkInterfaceSaturated expr: (rate(node_network_receive_bytes_total{device!~"^tap.*"}[1m]) + rate(node_network_transmit_bytes_total{device!~"^tap.*"}[1m])) / node_network_speed_bytes{device!~"^tap.*"} > 0.8 for: 1m labels: severity: warning annotations: summary: "Host Network Interface Saturated (instance {{ $labels.instance }})." description: "The network interface {{ $labels.interface }} on {{ $labels.instance }} is getting overloaded." - alert: HostSystemdServiceCrashed expr: node_systemd_unit_state{state="failed"} == 1 for: 0m labels: severity: warning annotations: summary: "Host SystemD service crashed (instance {{ $labels.instance }})." description: "SystemD service crashed." - alert: HostEdacCorrectableErrorsDetected expr: increase(node_edac_correctable_errors_total[1m]) > 0 for: 0m labels: severity: info annotations: summary: "Host EDAC Correctable Errors detected (instance {{ $labels.instance }})." description: '{{ $labels.instance }} has had {{ printf "%.0f" $value }} correctable memory errors reported by EDAC in the last 5 minutes.' - alert: HostEdacUncorrectableErrorsDetected expr: node_edac_uncorrectable_errors_total > 0 for: 0m labels: severity: warning annotations: summary: "Host EDAC Uncorrectable Errors detected (instance {{ $labels.instance }})." description: '{{ $labels.instance }} has had {{ printf "%.0f" $value }} uncorrectable memory errors reported by EDAC in the last 5 minutes.' - name: "Min.io" rules: - alert: MinioDiskOffline expr: minio_offline_disks > 0 for: 0m labels: severity: critical annotations: summary: "Minio disk offline (instance {{ $labels.instance }})" description: "Minio disk is offline." - alert: MinioStorageSpaceExhausted expr: minio_disk_storage_free_bytes / 1024 / 1024 / 1024 < 10 for: 2m labels: severity: warning annotations: summary: "Minio storage space exhausted (instance {{ $labels.instance }})." description: "Minio storage space is low (< 10 GB)." - name: "Prometheus" rules: - alert: PrometheusConfigurationReloadFailure expr: prometheus_config_last_reload_successful != 1 for: 0m labels: severity: warning annotations: summary: "Prometheus configuration reload failure (instance {{ $labels.instance }})." description: "Prometheus configuration reload error." - alert: PrometheusTooManyRestarts expr: changes(process_start_time_seconds{job=~"prometheus|pushgateway|alertmanager"}[15m]) > 2 for: 0m labels: severity: warning annotations: summary: "Prometheus too many restarts (instance {{ $labels.instance }})." description: "Prometheus has restarted more than twice in the last 15 minutes. It might be crashlooping." - alert: PrometheusAlertmanagerConfigurationReloadFailure expr: alertmanager_config_last_reload_successful != 1 for: 0m labels: severity: warning annotations: summary: "Prometheus AlertManager configuration reload failure (instance {{ $labels.instance }})." description: "AlertManager configuration reload error." - alert: PrometheusRuleEvaluationFailures expr: increase(prometheus_rule_evaluation_failures_total[3m]) > 0 for: 0m labels: severity: critical annotations: summary: "Prometheus rule evaluation failures (instance {{ $labels.instance }})." description: "Prometheus encountered {{ $value }} rule evaluation failures, leading to potentially ignored alerts." - alert: PrometheusTargetScrapingSlow expr: prometheus_target_interval_length_seconds{quantile="0.9"} > 60 for: 5m labels: severity: warning annotations: summary: "Prometheus target scraping slow (instance {{ $labels.instance }})." description: "Prometheus is scraping exporters slowly." - alert: PrometheusTsdbCompactionsFailed expr: increase(prometheus_tsdb_compactions_failed_total[1m]) > 0 for: 0m labels: severity: critical annotations: summary: "Prometheus TSDB compactions failed (instance {{ $labels.instance }})." description: "Prometheus encountered {{ $value }} TSDB compactions failures." - alert: PrometheusTsdbHeadTruncationsFailed expr: increase(prometheus_tsdb_head_truncations_failed_total[1m]) > 0 for: 0m labels: severity: critical annotations: summary: "Prometheus TSDB head truncations failed (instance {{ $labels.instance }})." description: "Prometheus encountered {{ $value }} TSDB head truncation failures." - alert: PrometheusTsdbWalCorruptions expr: increase(prometheus_tsdb_wal_corruptions_total[1m]) > 0 for: 0m labels: severity: critical annotations: summary: "Prometheus TSDB WAL corruptions (instance {{ $labels.instance }})." description: "Prometheus encountered {{ $value }} TSDB WAL corruptions." - alert: PrometheusTsdbWalTruncationsFailed expr: increase(prometheus_tsdb_wal_truncations_failed_total[1m]) > 0 for: 0m labels: severity: critical annotations: summary: "Prometheus TSDB WAL truncations failed (instance {{ $labels.instance }})." description: "Prometheus encountered {{ $value }} TSDB WAL truncation failures." EOH } template { change_mode = "noop" change_signal = "SIGINT" destination = "secrets/prometheus.yml" data = <