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123 lines
3.5 KiB
123 lines
3.5 KiB
// Copyright 2019 HAProxy Technologies
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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 discovery
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import (
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"context"
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"errors"
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"fmt"
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"time"
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"github.com/haproxytech/client-native/v6/configuration"
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"github.com/haproxytech/client-native/v6/models"
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"github.com/haproxytech/dataplaneapi/haproxy"
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)
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type consulServiceDiscovery struct {
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consulServices Store
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client configuration.Configuration
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reloadAgent haproxy.IReloadAgent
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context context.Context
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}
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// NewConsulDiscoveryService creates a new ServiceDiscovery that connects to consul
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func NewConsulDiscoveryService(params ServiceDiscoveriesParams) ServiceDiscovery {
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return &consulServiceDiscovery{
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consulServices: NewInstanceStore(),
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client: params.Client,
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reloadAgent: params.ReloadAgent,
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context: params.Context,
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}
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}
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func (c *consulServiceDiscovery) AddNode(id string, params ServiceDiscoveryParams) (err error) {
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cParams, ok := params.(*models.Consul)
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if !ok {
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return errors.New("expected models.Consuls")
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}
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var timeout time.Duration
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timeout, err = time.ParseDuration(fmt.Sprintf("%ds", *cParams.RetryTimeout))
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if err != nil {
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return err
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}
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logFields := map[string]interface{}{"ServiceDiscovery": "Consul", "ID": *cParams.ID}
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instance := &consulInstance{
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params: cParams,
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ctx: c.context,
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timeout: timeout,
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discoveryConfig: NewServiceDiscoveryInstance(c.client, c.reloadAgent, discoveryInstanceParams{
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Allowlist: cParams.ServiceAllowlist,
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Denylist: cParams.ServiceDenylist,
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LogFields: logFields,
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ServerSlotsBase: int(*cParams.ServerSlotsBase),
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SlotsGrowthType: *cParams.ServerSlotsGrowthType,
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SlotsIncrement: int(cParams.ServerSlotsGrowthIncrement),
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}),
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prevIndexes: make(map[string]uint64),
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logFields: logFields,
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}
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if err = c.consulServices.Create(id, instance); err != nil {
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return
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}
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instance.prevEnabled = *cParams.Enabled
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if *cParams.Enabled {
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return instance.start()
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}
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return nil
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}
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func (c *consulServiceDiscovery) GetNode(id string) (p ServiceDiscoveryParams, err error) {
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var i interface{}
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if i, err = c.consulServices.Read(id); err != nil {
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return
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}
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p = i.(*consulInstance).params
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return
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}
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func (c *consulServiceDiscovery) GetNodes() (ServiceDiscoveryParams, error) {
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var consuls models.Consuls
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for _, ci := range c.consulServices.List() {
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consuls = append(consuls, ci.(*consulInstance).params)
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}
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return consuls, nil
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}
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func (c *consulServiceDiscovery) RemoveNode(id string) error {
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return c.consulServices.Delete(id)
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}
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func (c *consulServiceDiscovery) UpdateNode(id string, params ServiceDiscoveryParams) (err error) {
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cParams, ok := params.(*models.Consul)
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if !ok {
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return errors.New("expected models.Consuls")
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}
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return c.consulServices.Update(id, func(item interface{}) error {
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ci := item.(*consulInstance)
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ci.params = cParams
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if err = ci.updateTimeout(int(*cParams.RetryTimeout)); err != nil {
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ci.stop()
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return errors.New("invalid retry_timeout")
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}
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return ci.handleStateChange()
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})
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}
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