loadbalancer.go
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package digitalocean
import (
"fmt"
"strings"
"congo.gg/pkg/platform"
"github.com/digitalocean/godo"
)
// CreateLoadBalancer creates a DigitalOcean load balancer.
func (b *backend) CreateLoadBalancer(cfg platform.LoadBalancerConfig) (*platform.LoadBalancer, error) {
region, ok := regions[cfg.Region]
if !ok {
region = string(cfg.Region)
}
port := cfg.Port
if port == 0 {
port = 443
}
targetPort := cfg.TargetPort
if targetPort == 0 {
targetPort = 80
}
healthPath := cfg.HealthPath
if healthPath == "" {
healthPath = "/health"
}
createReq := &godo.LoadBalancerRequest{
Name: cfg.Name,
Region: region,
ForwardingRules: []godo.ForwardingRule{
{
EntryProtocol: "https",
EntryPort: port,
TargetProtocol: "http",
TargetPort: targetPort,
},
{
EntryProtocol: "http",
EntryPort: 80,
TargetProtocol: "http",
TargetPort: targetPort,
},
},
HealthCheck: &godo.HealthCheck{
Protocol: "http",
Port: targetPort,
Path: healthPath,
CheckIntervalSeconds: 10,
ResponseTimeoutSeconds: 5,
UnhealthyThreshold: 3,
HealthyThreshold: 5,
},
Algorithm: "round_robin",
}
if cfg.VpcID != "" {
createReq.VPCUUID = cfg.VpcID
}
if len(cfg.ServerIDs) > 0 {
createReq.DropletIDs = cfg.ServerIDs
}
if len(cfg.Tags) > 0 {
createReq.Tag = cfg.Tags[0]
}
lb, _, err := b.client.LoadBalancers.Create(b.ctx, createReq)
if err != nil {
if strings.Contains(err.Error(), "already exists") {
return b.GetLoadBalancer(cfg.Name)
}
return nil, fmt.Errorf("create load balancer: %w", err)
}
return &platform.LoadBalancer{
ID: lb.ID,
Name: lb.Name,
IP: lb.IP,
Status: string(lb.Status),
}, nil
}
// GetLoadBalancer finds a load balancer by name.
func (b *backend) GetLoadBalancer(name string) (*platform.LoadBalancer, error) {
lbs, _, err := b.client.LoadBalancers.List(b.ctx, nil)
if err != nil {
return nil, fmt.Errorf("list load balancers: %w", err)
}
for _, lb := range lbs {
if lb.Name == name {
return &platform.LoadBalancer{
ID: lb.ID,
Name: lb.Name,
IP: lb.IP,
Status: string(lb.Status),
}, nil
}
}
return nil, platform.ErrNotFound
}
// DeleteLoadBalancer removes a load balancer by ID.
func (b *backend) DeleteLoadBalancer(id string) error {
_, err := b.client.LoadBalancers.Delete(b.ctx, id)
if err != nil {
if strings.Contains(err.Error(), "not found") {
return platform.ErrNotFound
}
return fmt.Errorf("delete load balancer: %w", err)
}
return nil
}