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kubectl.go
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kubectl.go
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// Copyright 2020 The PipeCD 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 kubernetes
import (
"bytes"
"context"
"fmt"
"os/exec"
"strings"
"k8s.io/client-go/rest"
)
type Kubectl struct {
version string
execPath string
config *rest.Config
}
func NewKubectl(version, path string) *Kubectl {
return &Kubectl{
version: version,
execPath: path,
}
}
func (c *Kubectl) Apply(ctx context.Context, namespace string, manifest Manifest) (err error) {
defer func() {
metricsKubectlCalled(c.version, "apply", err == nil)
}()
data, err := manifest.YamlBytes()
if err != nil {
return err
}
args := make([]string, 0, 5)
if namespace != "" {
args = append(args, "-n", namespace)
}
args = append(args, "apply", "-f", "-")
cmd := exec.CommandContext(ctx, c.execPath, args...)
r := bytes.NewReader(data)
cmd.Stdin = r
out, err := cmd.CombinedOutput()
if err != nil {
return fmt.Errorf("failed to apply: %s (%v)", string(out), err)
}
return nil
}
func (c *Kubectl) Delete(ctx context.Context, r ResourceKey) (err error) {
defer func() {
metricsKubectlCalled(c.version, "delete", err == nil)
}()
args := make([]string, 0, 5)
if r.Namespace != "" {
args = append(args, "-n", r.Namespace)
}
args = append(args, "delete", r.Kind, r.Name)
cmd := exec.CommandContext(ctx, c.execPath, args...)
out, err := cmd.CombinedOutput()
if strings.Contains(string(out), "(NotFound)") {
return fmt.Errorf("failed to delete: %s, (%w), %v", string(out), ErrNotFound, err)
}
if err != nil {
return fmt.Errorf("failed to delete: %s, %v", string(out), err)
}
return nil
}