/
service_account.go
116 lines (109 loc) · 4.05 KB
/
service_account.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
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
package cluster
import (
"github.com/caicloud/nirvana/log"
core_v1 "k8s.io/api/core/v1"
"k8s.io/api/policy/v1beta1"
rbac_v1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/api/errors"
meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"github.com/caicloud/cyclone/pkg/workflow/common"
)
// EnsureServiceAccount ensures default service account for stage pod created. Coordinator container in stage pod
// needs certain permission to pods and pods/log.
func EnsureServiceAccount(clusterClient *kubernetes.Clientset, namespace string) error {
if _, err := clusterClient.CoreV1().ServiceAccounts(namespace).Create(&core_v1.ServiceAccount{
ObjectMeta: meta_v1.ObjectMeta{
Name: common.DefaultServiceAccountName,
Namespace: namespace,
},
}); err != nil {
if errors.IsAlreadyExists(err) {
log.Infof("Service account %s already exist, skip it", common.DefaultServiceAccountName)
} else {
log.Errorf("Create service account %s error: %v", common.DefaultServiceAccountName, err)
return err
}
}
// Create PodSecurityPolicy for the service account. Here we create the least restricted policy, it equivalents to
// not using the pod security policy admission controller.
var trueValue = true
if _, err := clusterClient.PolicyV1beta1().PodSecurityPolicies().Create(&v1beta1.PodSecurityPolicy{
ObjectMeta: meta_v1.ObjectMeta{
Name: common.DefaultServiceAccountName,
Namespace: namespace,
},
Spec: v1beta1.PodSecurityPolicySpec{
Privileged: true,
AllowPrivilegeEscalation: &trueValue,
AllowedCapabilities: []core_v1.Capability{"*"},
HostNetwork: true,
HostPID: true,
HostIPC: true,
HostPorts: []v1beta1.HostPortRange{{Min: 0, Max: 65535}},
Volumes: []v1beta1.FSType{"*"},
RunAsUser: v1beta1.RunAsUserStrategyOptions{Rule: v1beta1.RunAsUserStrategyRunAsAny},
SELinux: v1beta1.SELinuxStrategyOptions{Rule: v1beta1.SELinuxStrategyRunAsAny},
SupplementalGroups: v1beta1.SupplementalGroupsStrategyOptions{Rule: v1beta1.SupplementalGroupsStrategyRunAsAny},
FSGroup: v1beta1.FSGroupStrategyOptions{Rule: v1beta1.FSGroupStrategyRunAsAny},
},
}); err != nil {
log.Warningf("Create PodSecurityPolicy error: %s, if cluster has pod security policy admission controller enabled, stage pod may fail", err)
}
if _, err := clusterClient.RbacV1().ClusterRoles().Create(&rbac_v1.ClusterRole{
ObjectMeta: meta_v1.ObjectMeta{
Name: common.DefaultServiceAccountName,
},
Rules: []rbac_v1.PolicyRule{
{
APIGroups: []string{""},
Resources: []string{"pods"},
Verbs: []string{"get", "update"},
},
{
APIGroups: []string{""},
Resources: []string{"pods/log"},
Verbs: []string{"get", "list", "watch"},
},
{
APIGroups: []string{"policy"},
Resources: []string{"podsecuritypolicies"},
Verbs: []string{"use"},
ResourceNames: []string{common.DefaultServiceAccountName},
},
},
}); err != nil {
if errors.IsAlreadyExists(err) {
log.Infof("ClusterRole %s already exist, skip it", common.DefaultServiceAccountName)
} else {
log.Errorf("Create ClusterRole %s error: %v", common.DefaultServiceAccountName, err)
return err
}
}
if _, err := clusterClient.RbacV1().RoleBindings(namespace).Create(&rbac_v1.RoleBinding{
ObjectMeta: meta_v1.ObjectMeta{
Name: common.DefaultServiceAccountName,
Namespace: namespace,
},
Subjects: []rbac_v1.Subject{
{
Kind: "ServiceAccount",
Name: common.DefaultServiceAccountName,
Namespace: namespace,
},
},
RoleRef: rbac_v1.RoleRef{
Kind: "ClusterRole",
Name: common.DefaultServiceAccountName,
APIGroup: "rbac.authorization.k8s.io",
},
}); err != nil {
if errors.IsAlreadyExists(err) {
log.Infof("RoleBingding %s already exist, skip it", common.DefaultServiceAccountName)
} else {
log.Errorf("Create RoleBinding %s error: %v", common.DefaultServiceAccountName, err)
return err
}
}
return nil
}