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pint/internal/checks

internal/checks/alerts_comparison_test.go

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1package checks_test
2
3import (
4 "testing"
5
6 "github.com/cloudflare/pint/internal/checks"
7 "github.com/cloudflare/pint/internal/promapi"
8)
9
10func newComparisonCheck(_ *promapi.FailoverGroup) checks.RuleChecker {
11 return checks.NewComparisonCheck()
12}
13
14func TestComparisonCheck(t *testing.T) {
15 testCases := []checkTest{
16 {
17 description: "ignores recording rules",
18 content: "- record: foo\n expr: up == 0\n",
19 checker: newComparisonCheck,
20 prometheus: noProm,
21 },
22 {
23 description: "ignores rules with syntax errors",
24 content: "- alert: Foo Is Down\n expr: sum(\n",
25 checker: newComparisonCheck,
26 prometheus: noProm,
27 },
28 {
29 description: "alert expr with > condition",
30 content: "- alert: Foo Is Down\n for: 10m\n expr: up{job=\"foo\"} > 0\n",
31 checker: newComparisonCheck,
32 prometheus: noProm,
33 },
34 {
35 description: "alert expr with >= condition",
36 content: "- alert: Foo Is Down\n for: 10m\n expr: up{job=\"foo\"} >= 1\n",
37 checker: newComparisonCheck,
38 prometheus: noProm,
39 },
40 {
41 description: "alert expr with == condition",
42 content: "- alert: Foo Is Down\n for: 10m\n expr: up{job=\"foo\"} == 1\n",
43 checker: newComparisonCheck,
44 prometheus: noProm,
45 },
46 {
47 description: "alert expr without any condition",
48 content: "- alert: Foo Is Down\n expr: up{job=\"foo\"}\n",
49 checker: newComparisonCheck,
50 prometheus: noProm,
51 problems: true,
52 },
53 {
54 description: "deep level comparison",
55 content: `
56- alert: High_UDP_Receive_Errors
57 expr: quantile_over_time(0.7,(irate(udp_packets_drops[2m]))[10m:2m]) > 200
58 AND ON (instance)
59 (rate(node_netstat_Udp_RcvbufErrors[5m])+rate(node_netstat_Udp6_RcvbufErrors[5m])) > 200
60`,
61 checker: newComparisonCheck,
62 prometheus: noProm,
63 },
64 {
65 description: "deep level without comparison",
66 content: `
67- alert: High_UDP_Receive_Errors
68 expr: quantile_over_time(0.7,(irate(udp_packets_drops[2m]))[10m:2m])
69 AND ON (instance)
70 rate(node_netstat_Udp_RcvbufErrors[5m])+rate(node_netstat_Udp6_RcvbufErrors[5m])
71`,
72 checker: newComparisonCheck,
73 prometheus: noProm,
74 problems: true,
75 },
76 {
77 description: "alert unless condition",
78 content: "- alert: Foo Is Down\n for: 10m\n expr: foo unless bar\n",
79 checker: newComparisonCheck,
80 prometheus: noProm,
81 },
82 {
83 description: "alert expr with bool",
84 content: "- alert: Error rate is high\n expr: rate(error_count[5m]) > bool 5\n",
85 checker: newComparisonCheck,
86 prometheus: noProm,
87 problems: true,
88 },
89 {
90 description: "alert expr with bool and condition",
91 content: "- alert: Error rate is high\n expr: rate(error_count[5m]) > bool 5 == 1\n",
92 checker: newComparisonCheck,
93 prometheus: noProm,
94 },
95 {
96 description: "alert on absent",
97 content: "- alert: Foo Is Missing\n expr: absent(foo)\n",
98 checker: newComparisonCheck,
99 prometheus: noProm,
100 },
101 {
102 description: "absent or absent",
103 content: "- alert: Foo Is Missing\n expr: absent(foo) or absent(bar)\n",
104 checker: newComparisonCheck,
105 prometheus: noProm,
106 },
107 {
108 description: "absent or absent or absent",
109 content: "- alert: Foo Is Missing\n expr: absent(foo) or absent(bar) or absent(bob{job=\"xx\"})\n",
110 checker: newComparisonCheck,
111 prometheus: noProm,
112 },
113 {
114 description: "alert on absent_over_time",
115 content: "- alert: Foo Is Missing\n expr: absent_over_time(foo[5m])\n",
116 checker: newComparisonCheck,
117 prometheus: noProm,
118 },
119 {
120 description: "(foo > 1) > bool 1",
121 content: "- alert: Foo Is Missing\n expr: (foo > 1) > bool 1\n",
122 checker: newComparisonCheck,
123 prometheus: noProm,
124 },
125 {
126 description: "vector(0) or (foo > 0)",
127 content: "- alert: Foo Is Down\n expr: (foo > 0) or vector(0)\n",
128 checker: newComparisonCheck,
129 prometheus: noProm,
130 problems: true,
131 },
132 {
133 description: "(foo > 0) or vector(0)",
134 content: "- alert: Foo Is Down\n expr: (foo > 0) or vector(0)\n",
135 checker: newComparisonCheck,
136 prometheus: noProm,
137 problems: true,
138 },
139 {
140 description: "absent(foo) or vector(0)",
141 content: "- alert: Foo Is Down\n expr: (foo > 0) or vector(0)\n",
142 checker: newComparisonCheck,
143 prometheus: noProm,
144 problems: true,
145 },
146 {
147 description: "(foo or vector(0)) / bar > 0",
148 content: "- alert: Foo Is Missing\n expr: (foo or vector(0)) / bar > 0\n",
149 checker: newComparisonCheck,
150 prometheus: noProm,
151 },
152 {
153 // FIXME this should warn because missing foo makes this `0 / <something> <= 0`, so <something> > 0 makes it `0 <= 0`.
154 description: "(foo or vector(0)) / bar <= 0",
155 content: "- alert: Foo Is Missing\n expr: (foo or vector(0)) / bar <= 0\n",
156 checker: newComparisonCheck,
157 prometheus: noProm,
158 },
159 {
160 description: "max() * group_right label_replace(...)",
161 content: `
162- alert: Foo Is Missing
163 expr: |
164 max(kernel_xfs_corruption_errors > 0) by (instance)
165 * on (instance) group_right
166 label_replace(salt_highstate_runner_configured_minions, "instance", "$1", "minion", "(.+)")
167`,
168 checker: newComparisonCheck,
169 prometheus: noProm,
170 },
171 {
172 description: "vector(0)",
173 content: "- alert: Foo Is Down\n expr: vector(0)\n",
174 checker: newComparisonCheck,
175 prometheus: noProm,
176 problems: true,
177 },
178 {
179 description: "alert on absent(vector(1))",
180 content: "- alert: Foo Is Missing\n expr: absent(vector(1))\n",
181 checker: newComparisonCheck,
182 prometheus: noProm,
183 },
184 }
185
186 runTests(t, testCases)
187}
188