mirror of
https://github.com/cloudnative-pg/plugin-barman-cloud.git
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1be34fe13e
Adopt the new attribution information for contributions to CloudNativePG: ``` Copyright © contributors to CloudNativePG, established as CloudNativePG a Series of LF Projects, LLC. ``` Adopt the SPDX format for Apache License 2.0 Signed-off-by: Marco Nenciarini <marco.nenciarini@enterprisedb.com> Signed-off-by: Leonardo Cecchi <leonardo.cecchi@enterprisedb.com> Co-authored-by: Leonardo Cecchi <leonardo.cecchi@enterprisedb.com>
90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
/*
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Copyright © contributors to CloudNativePG, established as
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CloudNativePG a Series of LF Projects, LLC.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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SPDX-License-Identifier: Apache-2.0
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*/
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package command
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import (
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"bytes"
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"context"
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"fmt"
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"time"
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"k8s.io/client-go/kubernetes"
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"k8s.io/client-go/rest"
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"k8s.io/client-go/tools/remotecommand"
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)
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// TODO: extract this and the one in CloudNativePG to a common library
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// ContainerLocator is a struct that contains the information needed to locate a container in a pod.
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type ContainerLocator struct {
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NamespaceName string
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PodName string
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ContainerName string
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}
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// ExecuteInContainer executes a command in a container. If timeout is not nil, the command will be
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// executed with the specified timeout. The function returns the stdout and stderr of the command.
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func ExecuteInContainer(
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ctx context.Context,
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clientSet kubernetes.Clientset,
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cfg *rest.Config,
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container ContainerLocator,
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timeout *time.Duration,
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command []string,
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) (string, string, error) {
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req := clientSet.CoreV1().RESTClient().Post().
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Resource("pods").
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Name(container.PodName).
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Namespace(container.NamespaceName).
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SubResource("exec").
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Param("container", container.ContainerName).
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Param("stdout", "true").
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Param("stderr", "true")
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for _, cmd := range command {
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req.Param("command", cmd)
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}
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newConfig := *cfg // local copy avoids modifying the passed config arg
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if timeout != nil {
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req.Timeout(*timeout)
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newConfig.Timeout = *timeout
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timedCtx, cancelFunc := context.WithTimeout(ctx, *timeout)
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defer cancelFunc()
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ctx = timedCtx
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}
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exec, err := remotecommand.NewSPDYExecutor(cfg, "POST", req.URL())
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if err != nil {
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return "", "", fmt.Errorf("error creating executor: %w", err)
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}
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var stdout, stderr bytes.Buffer
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err = exec.StreamWithContext(ctx, remotecommand.StreamOptions{
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Stdout: &stdout,
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Stderr: &stderr,
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})
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if err != nil {
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return "", "", fmt.Errorf("error executing command in pod '%s/%s': %w",
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container.NamespaceName, container.PodName, err)
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}
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return stdout.String(), stderr.String(), nil
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}
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