/
cluster.go
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/
cluster.go
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// Copyright Istio Authors
//
// 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 kube
import (
"bytes"
"fmt"
"istio.io/istio/pkg/kube"
"istio.io/istio/pkg/test/framework/components/cluster"
"istio.io/istio/pkg/test/framework/components/echo"
)
var _ echo.Cluster = &Cluster{}
// Cluster for a Kubernetes cluster. Provides access via a kube.Client.
type Cluster struct {
// filename is the path to the kubeconfig file for this cluster.
filename string
// vmSupport indicates the cluster is being used for fake VMs
vmSupport bool
// CLIClient is embedded to interact with the kube cluster.
kube.CLIClient
// Topology is embedded to include common functionality.
cluster.Topology
}
// CanDeploy for a kube cluster returns true if the config is a non-vm, or if the cluster supports
// fake pod-based VMs.
func (c *Cluster) CanDeploy(config echo.Config) (echo.Config, bool) {
if config.DeployAsVM && !c.isVMSupported() {
return echo.Config{}, false
}
return config, true
}
func (c *Cluster) isVMSupported() bool {
// VMs can only be deployed on config clusters, since they assume the cluster ID of the control plane.
return c.IsConfig() && c.vmSupport
}
// OverrideTopology allows customizing the relationship between this and other clusters
// for a single suite. This practice is discouraged, and separate test jobs should be created
// on a per-topology bassis.
// TODO remove this when centralistiod test is isolated as it's own job
func (c *Cluster) OverrideTopology(fn func(cluster.Topology) cluster.Topology) {
c.Topology = fn(c.Topology)
}
func (c *Cluster) String() string {
buf := &bytes.Buffer{}
_, _ = fmt.Fprint(buf, c.Topology.String())
_, _ = fmt.Fprintf(buf, "Filename: %s\n", c.filename)
return buf.String()
}
// Filename of the kubeconfig file for this cluster.
// TODO(nmittler): Remove the need for this by changing operator to use provided kube clients directly.
func (c Cluster) Filename() string {
return c.filename
}