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lbgroup.go
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lbgroup.go
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package libovsdbops
import (
"context"
"fmt"
libovsdbclient "github.com/ovn-org/libovsdb/client"
"github.com/ovn-org/libovsdb/model"
libovsdb "github.com/ovn-org/libovsdb/ovsdb"
"github.com/ovn-org/ovn-kubernetes/go-controller/pkg/nbdb"
"github.com/ovn-org/ovn-kubernetes/go-controller/pkg/types"
)
// findLBGroup looks up the Group in the cache and sets the UUID
func findLBGroup(nbClient libovsdbclient.Client, group *nbdb.LoadBalancerGroup) error {
if group.UUID != "" && !IsNamedUUID(group.UUID) {
return nil
}
ctx, cancel := context.WithTimeout(context.Background(), types.OVSDBTimeout)
defer cancel()
groups := []nbdb.LoadBalancerGroup{}
err := nbClient.WhereCache(func(item *nbdb.LoadBalancerGroup) bool {
return item.Name == group.Name
}).List(ctx, &groups)
if err != nil {
return fmt.Errorf("can't find LB group %+v: %v", *group, err)
}
if len(groups) > 1 {
return fmt.Errorf("unexpectedly found multiple LB Groups: %+v", groups)
}
if len(groups) == 0 {
return libovsdbclient.ErrNotFound
}
group.UUID = groups[0].UUID
return nil
}
func AddLoadBalancersToGroupOps(nbClient libovsdbclient.Client, ops []libovsdb.Operation, group *nbdb.LoadBalancerGroup, lbs ...*nbdb.LoadBalancer) ([]libovsdb.Operation, error) {
if ops == nil {
ops = []libovsdb.Operation{}
}
if len(lbs) == 0 {
return ops, nil
}
err := findLBGroup(nbClient, group)
if err != nil {
return nil, err
}
lbUUIDs := make([]string, 0, len(lbs))
for _, lb := range lbs {
lbUUIDs = append(lbUUIDs, lb.UUID)
}
op, err := nbClient.Where(group).Mutate(group, model.Mutation{
Field: &group.LoadBalancer,
Mutator: libovsdb.MutateOperationInsert,
Value: lbUUIDs,
})
if err != nil {
return nil, err
}
ops = append(ops, op...)
return ops, nil
}
func RemoveLoadBalancersFromGroupOps(nbClient libovsdbclient.Client, ops []libovsdb.Operation, group *nbdb.LoadBalancerGroup, lbs ...*nbdb.LoadBalancer) ([]libovsdb.Operation, error) {
if ops == nil {
ops = []libovsdb.Operation{}
}
if len(lbs) == 0 {
return ops, nil
}
err := findLBGroup(nbClient, group)
if err != nil {
return nil, err
}
lbUUIDs := make([]string, 0, len(lbs))
for _, lb := range lbs {
lbUUIDs = append(lbUUIDs, lb.UUID)
}
op, err := nbClient.Where(group).Mutate(group, model.Mutation{
Field: &group.LoadBalancer,
Mutator: libovsdb.MutateOperationDelete,
Value: lbUUIDs,
})
if err != nil {
return nil, err
}
ops = append(ops, op...)
return ops, nil
}
func ListGroupsWithLoadBalancers(nbClient libovsdbclient.Client) ([]nbdb.LoadBalancerGroup, error) {
groups := &[]nbdb.LoadBalancerGroup{}
ctx, cancel := context.WithTimeout(context.Background(), types.OVSDBTimeout)
defer cancel()
err := nbClient.WhereCache(func(item *nbdb.LoadBalancerGroup) bool {
return item.LoadBalancer != nil
}).List(ctx, groups)
if err != nil {
return nil, err
}
return *groups, nil
}