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client.go
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client.go
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// Copyright 2016-2018 Authors of Cilium
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package workloads
import (
"github.com/cilium/cilium/api/v1/models"
"github.com/cilium/cilium/pkg/endpoint"
)
var (
// defaultClient is the default client initialized by initClient
defaultClient WorkloadRuntime
)
func initClient(module workloadModule) error {
c, err := module.newClient()
if err != nil {
return err
}
defaultClient = c
return nil
}
// Client returns the global WorkloadRuntime being used.
func Client() WorkloadRuntime {
return defaultClient
}
// IsRunning returns false if the provided endpoint cannot be associated with a
// running workload. The runtime must be reachable to make this decision.
func IsRunning(ep *endpoint.Endpoint) bool {
if Client() == nil {
return false
}
return Client().IsRunning(ep)
}
// Status returns the status of the workload runtime
func Status() *models.Status {
if Client() == nil {
return &models.Status{State: models.StatusStateDisabled}
}
return Client().Status()
}
// EnableEventListener watches for docker events. Performs the plumbing for the
// containers started or dead.
func EnableEventListener() (eventsCh chan<- *EventMessage, err error) {
if Client() == nil {
return nil, nil
}
return Client().EnableEventListener()
}
// IgnoreRunningWorkloads checks for already running containers and checks
// their IP address, then adds the containers to the list of ignored containers
// and allocates the IPs they are using to prevent future collisions.
func IgnoreRunningWorkloads() {
if Client() == nil {
return
}
Client().IgnoreRunningWorkloads()
}