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feat: check formatting and validity of alerts

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Fixes #94.
This commit is contained in:
Luke Granger-Brown 2024-10-07 19:41:23 +00:00
parent 6a8f49f180
commit 84cfbdb050
4 changed files with 242 additions and 190 deletions
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7
services/monitoring/lgtm/alerts/forkos.yaml
View file

@ -1,11 +1,12 @@
namespace: forkos
groups:
- name: ForkOS automation
rules:
- alert: SyncFailedTooOften
expr: 'changes(node_systemd_unit_state{name=~"ows.*.service",state="failed"}[24h]) > 2'
expr: 'changes(node_systemd_unit_state{name=~"ows.*.service",state="failed"}[1d]) > 2'
for: 30m
labels:
severity: critical
annotations:
summary: "Synchronization job {{ $labels.name }} has failed more than twice in the last 24 hours"
description: "On {{ $labels.instance }}, the synchronization job has failed more than twice in the last 24 hours, check if there's a conflict or a stdenv change."
description: On {{ $labels.instance }}, the synchronization job has failed more than twice in the last 24 hours, check if there's a conflict or a stdenv change.
summary: Synchronization job {{ $labels.name }} has failed more than twice in the last 24 hours

83
services/monitoring/lgtm/alerts/postgres.yml
View file

@ -1,102 +1,119 @@
namespace: postgres
groups:
- name: PostgreSQL
- name: PostgreSQL
rules:
- alert: PostgresqlTableNotAutoVacuumed
expr: '(pg_stat_user_tables_last_autovacuum > 0) and (time() - pg_stat_user_tables_last_autovacuum) > 60 * 60 * 24 * 10'
for: 0m
labels:
severity: warning
annotations:
description: |-
Table {{ $labels.relname }} has not been auto vacuumed for 10 days
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql table not auto vacuumed (instance {{ $labels.instance }})
description: "Table {{ $labels.relname }} has not been auto vacuumed for 10 days\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlTableNotAutoAnalyzed
expr: '(pg_stat_user_tables_last_autoanalyze > 0) and (time() - pg_stat_user_tables_last_autoanalyze) > 24 * 60 * 60 * 10'
for: 0m
labels:
severity: warning
annotations:
description: |-
Table {{ $labels.relname }} has not been auto analyzed for 10 days
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql table not auto analyzed (instance {{ $labels.instance }})
description: "Table {{ $labels.relname }} has not been auto analyzed for 10 days\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlDeadLocks
expr: 'increase(pg_stat_database_deadlocks{datname!~"template.*|postgres"}[1m]) > 5'
for: 0m
labels:
severity: warning
annotations:
description: |-
PostgreSQL has dead-locks
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql dead locks (instance {{ $labels.instance }})
description: "PostgreSQL has dead-locks\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlHighRollbackRate
expr: 'sum by (namespace,datname) ((rate(pg_stat_database_xact_rollback{datname!~"template.*|postgres",datid!="0"}[3m])) / ((rate(pg_stat_database_xact_rollback{datname!~"template.*|postgres",datid!="0"}[3m])) + (rate(pg_stat_database_xact_commit{datname!~"template.*|postgres",datid!="0"}[3m])))) > 0.02'
for: 0m
expr: 'sum by (namespace, datname) ((rate(pg_stat_database_xact_rollback{datid!="0",datname!~"template.*|postgres"}[3m])) / ((rate(pg_stat_database_xact_rollback{datid!="0",datname!~"template.*|postgres"}[3m])) + (rate(pg_stat_database_xact_commit{datid!="0",datname!~"template.*|postgres"}[3m])))) > 0.02'
labels:
severity: warning
annotations:
description: |-
Ratio of transactions being aborted compared to committed is > 2 %
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql high rollback rate (instance {{ $labels.instance }})
description: "Ratio of transactions being aborted compared to committed is > 2 %\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlHighRateStatementTimeout
expr: 'rate(postgresql_errors_total{type="statement_timeout"}[1m]) > 3'
for: 0m
labels:
severity: critical
annotations:
description: |-
Postgres transactions showing high rate of statement timeouts
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql high rate statement timeout (instance {{ $labels.instance }})
description: "Postgres transactions showing high rate of statement timeouts\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlHighRateDeadlock
expr: 'increase(postgresql_errors_total{type="deadlock_detected"}[1m]) > 1'
for: 0m
labels:
severity: critical
annotations:
description: |-
Postgres detected deadlocks
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql high rate deadlock (instance {{ $labels.instance }})
description: "Postgres detected deadlocks\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlTooManyDeadTuples
expr: '((pg_stat_user_tables_n_dead_tup > 10000) / (pg_stat_user_tables_n_live_tup + pg_stat_user_tables_n_dead_tup)) >= 0.1'
for: 2m
labels:
severity: warning
annotations:
description: |-
PostgreSQL dead tuples is too large
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql too many dead tuples (instance {{ $labels.instance }})
description: "PostgreSQL dead tuples is too large\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlTooManyLocksAcquired
expr: '((sum (pg_locks_count)) / (pg_settings_max_locks_per_transaction * pg_settings_max_connections)) > 0.20'
expr: '((sum(pg_locks_count)) / (pg_settings_max_locks_per_transaction * pg_settings_max_connections)) > 0.2'
for: 2m
labels:
severity: critical
annotations:
description: |-
Too many locks acquired on the database. If this alert happens frequently, we may need to increase the postgres setting max_locks_per_transaction.
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql too many locks acquired (instance {{ $labels.instance }})
description: "Too many locks acquired on the database. If this alert happens frequently, we may need to increase the postgres setting max_locks_per_transaction.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlBloatIndexHigh(>80%)
expr: 'pg_bloat_btree_bloat_pct > 80 and on (idxname) (pg_bloat_btree_real_size > 100000000)'
expr: 'pg_bloat_btree_bloat_pct > 80 and on (idxname) (pg_bloat_btree_real_size > 1e+08)'
for: 1h
labels:
severity: warning
annotations:
description: |-
The index {{ $labels.idxname }} is bloated. You should execute `REINDEX INDEX CONCURRENTLY {{ $labels.idxname }};`
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql bloat index high (> 80%) (instance {{ $labels.instance }})
description: "The index {{ $labels.idxname }} is bloated. You should execute `REINDEX INDEX CONCURRENTLY {{ $labels.idxname }};`\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlBloatTableHigh(>80%)
expr: 'pg_bloat_table_bloat_pct > 80 and on (relname) (pg_bloat_table_real_size > 200000000)'
expr: 'pg_bloat_table_bloat_pct > 80 and on (relname) (pg_bloat_table_real_size > 2e+08)'
for: 1h
labels:
severity: warning
annotations:
description: |-
The table {{ $labels.relname }} is bloated. You should execute `VACUUM {{ $labels.relname }};`
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql bloat table high (> 80%) (instance {{ $labels.instance }})
description: "The table {{ $labels.relname }} is bloated. You should execute `VACUUM {{ $labels.relname }};`\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: PostgresqlInvalidIndex
expr: 'pg_genaral_index_info_pg_relation_size{indexrelname=~".*ccnew.*"}'
for: 6h
labels:
severity: warning
annotations:
description: |-
The table {{ $labels.relname }} has an invalid index: {{ $labels.indexrelname }}. You should execute `DROP INDEX {{ $labels.indexrelname }};`
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Postgresql invalid index (instance {{ $labels.instance }})
description: "The table {{ $labels.relname }} has an invalid index: {{ $labels.indexrelname }}. You should execute `DROP INDEX {{ $labels.indexrelname }};`\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"

67
services/monitoring/lgtm/alerts/resources.yaml
View file

@ -1,76 +1,101 @@
namespace: resources
groups:
- name: Host & hardware
rules:
- alert: HostOutOfMemory
expr: (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes * 100 < 10) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
expr: (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes * 100 < 10) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 2m
labels:
severity: warning
annotations:
description: |-
Node memory is filling up (< 10% left)
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host out of memory (instance {{ $labels.instance }})
description: "Node memory is filling up (< 10% left)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostMemoryUnderMemoryPressure
expr: (rate(node_vmstat_pgmajfault[1m]) > 1000) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
expr: (rate(node_vmstat_pgmajfault[1m]) > 1000) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 2m
labels:
severity: warning
annotations:
description: |-
The node is under heavy memory pressure. High rate of major page faults
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host memory under memory pressure (instance {{ $labels.instance }})
description: "The node is under heavy memory pressure. High rate of major page faults\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostMemoryIsUnderutilized
expr: (100 - (avg_over_time(node_memory_MemAvailable_bytes[30m]) / node_memory_MemTotal_bytes * 100) < 20) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
expr: (100 - (avg_over_time(node_memory_MemAvailable_bytes[30m]) / node_memory_MemTotal_bytes * 100) < 20) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 1w
labels:
severity: info
annotations:
description: |-
Node memory is < 20% for 1 week. Consider reducing memory space. (instance {{ $labels.instance }})
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host Memory is underutilized (instance {{ $labels.instance }})
description: "Node memory is < 20% for 1 week. Consider reducing memory space. (instance {{ $labels.instance }})\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostOutOfDiskSpace
expr: ((node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and ON (instance, device, mountpoint) node_filesystem_readonly == 0) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
expr: ((node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and on (instance, device, mountpoint) node_filesystem_readonly == 0) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 2m
labels:
severity: warning
annotations:
description: |-
Disk is almost full (< 10% left)
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host out of disk space (instance {{ $labels.instance }})
description: "Disk is almost full (< 10% left)\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostDiskWillFillIn24Hours
expr: ((node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and ON (instance, device, mountpoint) predict_linear(node_filesystem_avail_bytes{fstype!~"tmpfs"}[1h], 24 * 3600) < 0 and ON (instance, device, mountpoint) node_filesystem_readonly == 0) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
expr: ((node_filesystem_avail_bytes * 100) / node_filesystem_size_bytes < 10 and on (instance, device, mountpoint) predict_linear(node_filesystem_avail_bytes{fstype!~"tmpfs"}[1h], 24 * 3600) < 0 and on (instance, device, mountpoint) node_filesystem_readonly == 0) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 2m
labels:
severity: warning
annotations:
description: |-
Filesystem is predicted to run out of space within the next 24 hours at current write rate
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host disk will fill in 24 hours (instance {{ $labels.instance }})
description: "Filesystem is predicted to run out of space within the next 24 hours at current write rate\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostCpuIsUnderutilized
expr: (100 - (rate(node_cpu_seconds_total{mode="idle"}[30m]) * 100) < 20) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
expr: (100 - (rate(node_cpu_seconds_total{mode="idle"}[30m]) * 100) < 20) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 1w
labels:
severity: info
annotations:
description: |-
CPU load is < 20% for 1 week. Consider reducing the number of CPUs.
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host CPU is underutilized (instance {{ $labels.instance }})
description: "CPU load is < 20% for 1 week. Consider reducing the number of CPUs.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostCpuStealNoisyNeighbor
expr: (avg by(instance) (rate(node_cpu_seconds_total{mode="steal"}[5m])) * 100 > 10) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 0m
expr: (avg by (instance) (rate(node_cpu_seconds_total{mode="steal"}[5m])) * 100 > 10) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
labels:
severity: warning
annotations:
description: |-
CPU steal is > 10%. A noisy neighbor is killing VM performances or a spot instance may be out of credit.
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host CPU steal noisy neighbor (instance {{ $labels.instance }})
description: "CPU steal is > 10%. A noisy neighbor is killing VM performances or a spot instance may be out of credit.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostOomKillDetected
expr: (increase(node_vmstat_oom_kill[1m]) > 0) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 0m
expr: (increase(node_vmstat_oom_kill[1m]) > 0) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
labels:
severity: warning
annotations:
description: |-
OOM kill detected
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host OOM kill detected (instance {{ $labels.instance }})
description: "OOM kill detected\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"
- alert: HostNetworkInterfaceSaturated
expr: ((rate(node_network_receive_bytes_total{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"}[1m]) + rate(node_network_transmit_bytes_total{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"}[1m])) / node_network_speed_bytes{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"} > 0.8 < 10000) * on(instance) group_left (nodename) node_uname_info{nodename=~".+"}
expr: ((rate(node_network_receive_bytes_total{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"}[1m]) + rate(node_network_transmit_bytes_total{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"}[1m])) / node_network_speed_bytes{device!~"^tap.*|^vnet.*|^veth.*|^tun.*"} > 0.8 < 10000) * on (instance) group_left (nodename) node_uname_info{nodename=~".+"}
for: 1m
labels:
severity: warning
annotations:
description: |-
The network interface "{{ $labels.device }}" on "{{ $labels.instance }}" is getting overloaded.
VALUE = {{ $value }}
LABELS = {{ $labels }}
summary: Host Network Interface Saturated (instance {{ $labels.instance }})
description: "The network interface \"{{ $labels.device }}\" on \"{{ $labels.instance }}\" is getting overloaded.\n VALUE = {{ $value }}\n LABELS = {{ $labels }}"

17
services/monitoring/lgtm/mimir.nix
View file

@ -9,6 +9,18 @@ let
inherit (lib) mkEnableOption mkIf;
mimirPort = config.services.mimir.configuration.server.http_listen_port;
alerts = pkgs.runCommand "mimir-alerts-checked" {
src = ./alerts;
nativeBuildInputs = with pkgs; [ mimir ];
} ''
mkdir $out
cp -R $src $out/anonymous/
chmod -R +w $out
mimirtool rules check --rule-dirs=$out/anonymous
mimirtool rules lint --rule-dirs=$out/anonymous
diff -r $src $out/anonymous
'';
in
{
options.bagel.services.prometheus.enable = mkEnableOption "Prometheus scraper";
@ -60,10 +72,7 @@ in
blocks_storage.backend = "s3";
ruler_storage = {
backend = "local";
local.directory = pkgs.runCommand "mimir-rules" {} ''
mkdir -p $out
ln -s ${./alerts} $out/anonymous
'';
local.directory = alerts;
};
alertmanager = {