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79 lines
1.6 KiB
79 lines
1.6 KiB
package etcd
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import (
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"context"
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"net/url"
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"github.com/k3s-io/k3s/pkg/agent/loadbalancer"
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"github.com/pkg/errors"
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)
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type Proxy interface {
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Update(addresses []string)
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ETCDURL() string
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ETCDAddresses() []string
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ETCDServerURL() string
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}
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// NewETCDProxy initializes a new proxy structure that contain a load balancer
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// which listens on port 2379 and proxy between etcd cluster members
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func NewETCDProxy(ctx context.Context, enabled bool, dataDir, etcdURL string, isIPv6 bool) (Proxy, error) {
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u, err := url.Parse(etcdURL)
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if err != nil {
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return nil, errors.Wrap(err, "failed to parse etcd client URL")
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}
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e := &etcdproxy{
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dataDir: dataDir,
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initialETCDURL: etcdURL,
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etcdURL: etcdURL,
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}
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if enabled {
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lb, err := loadbalancer.New(ctx, dataDir, loadbalancer.ETCDServerServiceName, etcdURL, 2379, isIPv6)
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if err != nil {
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return nil, err
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}
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e.etcdLB = lb
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e.etcdLBURL = lb.LoadBalancerServerURL()
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}
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e.fallbackETCDAddress = u.Host
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e.etcdPort = u.Port()
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return e, nil
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}
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type etcdproxy struct {
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dataDir string
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etcdLBURL string
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initialETCDURL string
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etcdURL string
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etcdPort string
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fallbackETCDAddress string
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etcdAddresses []string
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etcdLB *loadbalancer.LoadBalancer
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}
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func (e *etcdproxy) Update(addresses []string) {
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if e.etcdLB != nil {
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e.etcdLB.Update(addresses)
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}
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}
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func (e *etcdproxy) ETCDURL() string {
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return e.etcdURL
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}
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func (e *etcdproxy) ETCDAddresses() []string {
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if len(e.etcdAddresses) > 0 {
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return e.etcdAddresses
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}
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return []string{e.fallbackETCDAddress}
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}
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func (e *etcdproxy) ETCDServerURL() string {
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return e.etcdURL
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}
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