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service.go
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service.go
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package sources
import (
"github.com/overmindtech/discovery"
"github.com/overmindtech/sdp-go"
v1 "k8s.io/api/core/v1"
metaV1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
)
func serviceExtractor(resource *v1.Service, scope string) ([]*sdp.LinkedItemQuery, error) {
queries := make([]*sdp.LinkedItemQuery, 0)
if resource.Spec.Selector != nil {
// +overmind:link Pod
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "Pod",
Method: sdp.QueryMethod_SEARCH,
Query: LabelSelectorToQuery(&metaV1.LabelSelector{
MatchLabels: resource.Spec.Selector,
}),
Scope: scope,
},
BlastPropagation: &sdp.BlastPropagation{
// Bidirectional propagation since we control the pods, and the
// pods host the service
In: true,
Out: true,
},
})
}
ips := make([]string, 0)
if len(resource.Spec.ClusterIPs) > 0 {
ips = append(ips, resource.Spec.ClusterIPs...)
} else if resource.Spec.ClusterIP != "" {
ips = append(ips, resource.Spec.ClusterIP)
}
ips = append(ips, resource.Spec.ExternalIPs...)
ips = append(ips, resource.Spec.LoadBalancerIP)
for _, ip := range ips {
if ip != "" {
// +overmind:link ip
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "ip",
Method: sdp.QueryMethod_GET,
Query: ip,
Scope: "global",
},
BlastPropagation: &sdp.BlastPropagation{
// IPs are always bidirectional
In: true,
Out: true,
},
})
}
}
if resource.Spec.ExternalName != "" {
// +overmind:link dns
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "dns",
Method: sdp.QueryMethod_SEARCH,
Query: resource.Spec.ExternalName,
Scope: "global",
},
BlastPropagation: &sdp.BlastPropagation{
// DNS is always bidirectional
In: true,
Out: true,
},
})
}
// Services also generate an endpoint with the same name
// +overmind:link Endpoint
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "Endpoint",
Method: sdp.QueryMethod_GET,
Query: resource.Name,
Scope: scope,
},
BlastPropagation: &sdp.BlastPropagation{
// The service causes the endpoint to be created, so changes to the
// service can affect the endpoint and vice versa
In: true,
Out: true,
},
})
for _, ingress := range resource.Status.LoadBalancer.Ingress {
if ingress.IP != "" {
// +overmind:link ip
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "ip",
Method: sdp.QueryMethod_GET,
Query: ingress.IP,
Scope: "global",
},
BlastPropagation: &sdp.BlastPropagation{
// IPs are always bidirectional
In: true,
Out: true,
},
})
}
if ingress.Hostname != "" {
// +overmind:link dns
queries = append(queries, &sdp.LinkedItemQuery{
Query: &sdp.Query{
Type: "dns",
Method: sdp.QueryMethod_SEARCH,
Query: ingress.Hostname,
Scope: "global",
},
BlastPropagation: &sdp.BlastPropagation{
// DNS is always bidirectional
In: true,
Out: true,
},
})
}
}
return queries, nil
}
//go:generate docgen ../docs-data
// +overmind:type Service
// +overmind:descriptiveType Service
// +overmind:get Get a service by name
// +overmind:list List all services
// +overmind:search Search for a service using the ListOptions JSON format: https://github.com/overmindtech/k8s-source#search
// +overmind:group Kubernetes
// +overmind:terraform:queryMap kubernetes_service.metadata[0].name
// +overmind:terraform:queryMap kubernetes_service_v1.metadata[0].name
// +overmind:terraform:scope ${provider_mapping.cluster_name}.${values.metadata[0].namespace}
func newServiceSource(cs *kubernetes.Clientset, cluster string, namespaces []string) discovery.Source {
return &KubeTypeSource[*v1.Service, *v1.ServiceList]{
ClusterName: cluster,
Namespaces: namespaces,
TypeName: "Service",
NamespacedInterfaceBuilder: func(namespace string) ItemInterface[*v1.Service, *v1.ServiceList] {
return cs.CoreV1().Services(namespace)
},
ListExtractor: func(list *v1.ServiceList) ([]*v1.Service, error) {
extracted := make([]*v1.Service, len(list.Items))
for i := range list.Items {
extracted[i] = &list.Items[i]
}
return extracted, nil
},
LinkedItemQueryExtractor: serviceExtractor,
}
}
func init() {
registerSourceLoader(newServiceSource)
}