/
template.go
61 lines (53 loc) · 1.8 KB
/
template.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
package pdbmaxunavailable
import (
"fmt"
"golang.stackrox.io/kube-linter/pkg/check"
"golang.stackrox.io/kube-linter/pkg/config"
"golang.stackrox.io/kube-linter/pkg/diagnostic"
"golang.stackrox.io/kube-linter/pkg/lintcontext"
"golang.stackrox.io/kube-linter/pkg/objectkinds"
"golang.stackrox.io/kube-linter/pkg/templates"
"golang.stackrox.io/kube-linter/pkg/templates/pdbmaxunavailable/internal/params"
pdbV1 "k8s.io/api/policy/v1"
"k8s.io/apimachinery/pkg/util/intstr"
)
const (
templateKey = "pdb-max-unavailable"
)
func init() {
templates.Register(check.Template{
HumanName: "No pod disruptions allowed - maxUnavailable",
Key: templateKey,
Description: "Flag PodDisruptionBudgets whose maxUnavailable value will always prevent pod disruptions.",
SupportedObjectKinds: config.ObjectKindsDesc{
ObjectKinds: []string{
objectkinds.PodDisruptionBudget},
},
Parameters: params.ParamDescs,
ParseAndValidateParams: params.ParseAndValidate,
Instantiate: params.WrapInstantiateFunc(func(p params.Params) (check.Func, error) {
return func(lintCtx lintcontext.LintContext, object lintcontext.Object) []diagnostic.Diagnostic {
// Get the PDB provided
pdb, ok := object.K8sObject.(*pdbV1.PodDisruptionBudget)
if !ok {
return nil
}
if pdb.Spec.MaxUnavailable == nil {
return []diagnostic.Diagnostic{}
}
maxUnavailable, err := intstr.GetScaledValueFromIntOrPercent(pdb.Spec.MaxUnavailable, 100, false)
if err != nil {
return []diagnostic.Diagnostic{{
Message: fmt.Sprintf("maxUnavailable has invalid value [%s]", pdb.Spec.MaxUnavailable),
}}
}
if maxUnavailable == 0 {
return []diagnostic.Diagnostic{{
Message: "MaxUnavailable is set to 0",
}}
}
return []diagnostic.Diagnostic{}
}, nil
}),
})
}