mirror of https://github.com/kubernetes/kops.git
230 lines
5.9 KiB
Go
230 lines
5.9 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package dotasks
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"strings"
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"time"
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"github.com/digitalocean/godo"
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"k8s.io/klog"
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"k8s.io/kops/pkg/resources/digitalocean"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/cloudup/do"
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)
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//go:generate fitask -type=LoadBalancer
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type LoadBalancer struct {
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Name *string
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ID *string
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Lifecycle *fi.Lifecycle
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Region *string
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DropletTag *string
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IPAddress *string
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ForAPIServer bool
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}
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var _ fi.CompareWithID = &LoadBalancer{}
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var _ fi.HasAddress = &LoadBalancer{}
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func (lb *LoadBalancer) CompareWithID() *string {
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return lb.ID
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}
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func (lb *LoadBalancer) Find(c *fi.Context) (*LoadBalancer, error) {
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klog.V(10).Infof("load balancer FIND - ID=%s, name=%s", fi.StringValue(lb.ID), fi.StringValue(lb.Name))
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if fi.StringValue(lb.ID) == "" {
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// Loadbalancer = nil if not found
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return nil, nil
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}
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cloud := c.Cloud.(*digitalocean.Cloud)
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lbService := cloud.LoadBalancers()
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loadbalancer, _, err := lbService.Get(context.TODO(), fi.StringValue(lb.ID))
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if err != nil {
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return nil, fmt.Errorf("load balancer service get request returned error %v", err)
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}
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return &LoadBalancer{
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Name: fi.String(loadbalancer.Name),
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ID: fi.String(loadbalancer.ID),
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Lifecycle: lb.Lifecycle,
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Region: fi.String(loadbalancer.Region.Slug),
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}, nil
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}
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func (lb *LoadBalancer) Run(c *fi.Context) error {
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return fi.DefaultDeltaRunMethod(lb, c)
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}
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func (_ *LoadBalancer) CheckChanges(a, e, changes *LoadBalancer) error {
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if a != nil {
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if changes.Name != nil {
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return fi.CannotChangeField("Name")
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}
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if changes.ID != nil {
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return fi.CannotChangeField("ID")
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}
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if changes.Region != nil {
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return fi.CannotChangeField("Region")
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}
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} else {
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if e.Name == nil {
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return fi.RequiredField("Name")
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}
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if e.Region == nil {
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return fi.RequiredField("Region")
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}
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}
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return nil
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}
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func (_ *LoadBalancer) RenderDO(t *do.DOAPITarget, a, e, changes *LoadBalancer) error {
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Rules := []godo.ForwardingRule{
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{
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EntryProtocol: "https",
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EntryPort: 443,
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TargetProtocol: "https",
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TargetPort: 443,
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TlsPassthrough: true,
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},
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{
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EntryProtocol: "http",
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EntryPort: 80,
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TargetProtocol: "http",
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TargetPort: 80,
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},
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}
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HealthCheck := &godo.HealthCheck{
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Protocol: "tcp",
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Port: 443,
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Path: "",
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CheckIntervalSeconds: 60,
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ResponseTimeoutSeconds: 5,
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UnhealthyThreshold: 3,
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HealthyThreshold: 5,
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}
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// check if load balancer exist.
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loadBalancers, err := t.Cloud.GetAllLoadBalancers()
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if err != nil {
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return fmt.Errorf("LoadBalancers.List returned error: %v", err)
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}
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for _, loadbalancer := range loadBalancers {
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klog.V(10).Infof("load balancer retrieved=%s, e.Name=%s", loadbalancer.Name, fi.StringValue(e.Name))
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if strings.Contains(loadbalancer.Name, fi.StringValue(e.Name)) {
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// load balancer already exists.
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e.ID = fi.String(loadbalancer.ID)
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e.IPAddress = fi.String(loadbalancer.IP) // This will be empty on create, but will be filled later on FindIPAddress invokation.
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return nil
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}
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}
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// load balancer doesn't exist. Create one.
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klog.V(10).Infof("Creating load balancer for DO")
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loadBalancerService := t.Cloud.LoadBalancers()
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loadbalancer, _, err := loadBalancerService.Create(context.TODO(), &godo.LoadBalancerRequest{
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Name: fi.StringValue(e.Name),
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Region: fi.StringValue(e.Region),
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Tag: fi.StringValue(e.DropletTag),
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ForwardingRules: Rules,
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HealthCheck: HealthCheck,
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})
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if err != nil {
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klog.Errorf("Error creating load balancer with Name=%s, Error=%v", fi.StringValue(e.Name), err)
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return err
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}
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e.ID = fi.String(loadbalancer.ID)
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e.IPAddress = fi.String(loadbalancer.IP) // This will be empty on create, but will be filled later on FindIPAddress invokation.
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return nil
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}
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func (lb *LoadBalancer) IsForAPIServer() bool {
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return lb.ForAPIServer
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}
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func (lb *LoadBalancer) FindIPAddress(c *fi.Context) (*string, error) {
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cloud := c.Cloud.(*digitalocean.Cloud)
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loadBalancerService := cloud.LoadBalancers()
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if len(fi.StringValue(lb.ID)) > 0 {
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// able to retrieve ID.
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klog.V(10).Infof("Find IP address for load balancer ID=%s", fi.StringValue(lb.ID))
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loadBalancer, _, err := loadBalancerService.Get(context.TODO(), fi.StringValue(lb.ID))
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if err != nil {
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klog.Errorf("Error fetching load balancer with Name=%s", fi.StringValue(lb.Name))
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return nil, err
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}
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address := loadBalancer.IP
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if isIPv4(address) {
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klog.V(10).Infof("load balancer address=%s", address)
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return &address, nil
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}
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} else {
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// check with the name.
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// check if load balancer exist.
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loadBalancers, err := cloud.GetAllLoadBalancers()
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if err != nil {
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return nil, fmt.Errorf("LoadBalancers.List returned error: %v", err)
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}
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for _, loadbalancer := range loadBalancers {
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if strings.Contains(loadbalancer.Name, fi.StringValue(lb.Name)) {
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// load balancer already exists.
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address := loadbalancer.IP
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if isIPv4(address) {
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klog.V(10).Infof("load balancer address=%s", address)
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return &address, nil
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}
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}
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}
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}
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const lbWaitTime = 10 * time.Second
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klog.Warningf("IP address for LB %s not yet available -- sleeping %s", fi.StringValue(lb.Name), lbWaitTime)
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time.Sleep(lbWaitTime)
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return nil, errors.New("IP Address is still empty.")
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}
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func isIPv4(host string) bool {
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ip := net.ParseIP(host)
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if ip == nil {
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return false
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}
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return ip.To4() != nil
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}
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