mirror of
https://github.com/kubesphere/kubekey.git
synced 2025-12-26 01:22:51 +00:00
100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
/*
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Copyright 2023 The KubeSphere Authors.
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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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*/
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package modules
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import (
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"context"
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"fmt"
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"strings"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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"github.com/kubesphere/kubekey/v4/pkg/variable"
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)
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/*
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The Command module executes shell commands on remote hosts and returns their output.
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This module allows users to run arbitrary shell commands and capture their output.
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Configuration:
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Users can specify the command to execute:
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command: "ls -l" # The shell command to execute
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Usage Examples in Playbook Tasks:
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1. Basic command execution:
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```yaml
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- name: List directory contents
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command: ls -l
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register: ls_result
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```
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2. Command with variables:
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```yaml
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- name: Check service status
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command: systemctl status {{ service_name }}
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register: service_status
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```
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3. Complex command:
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```yaml
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- name: Get disk usage
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command: df -h | grep /dev/sda1
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register: disk_usage
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```
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Return Values:
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- On success: Returns command output in stdout
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- On failure: Returns error message in stderr
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*/
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// ModuleCommand handles the "command" module, executing shell commands on remote hosts
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func ModuleCommand(ctx context.Context, options ExecOptions) (string, string) {
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// get host variable
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ha, err := options.getAllVariables()
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if err != nil {
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return "", err.Error()
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}
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// get connector
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conn, err := getConnector(ctx, options.Host, options.Variable)
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if err != nil {
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return "", fmt.Sprintf("failed to connector of %q error: %v", options.Host, err)
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}
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defer conn.Close(ctx)
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// command string
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command, err := variable.Extension2String(ha, options.Args)
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if err != nil {
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return "", err.Error()
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}
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// execute command
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var stdout, stderr string
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data, err := conn.ExecuteCommand(ctx, string(command))
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if err != nil {
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stderr = err.Error()
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}
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if data != nil {
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stdout = strings.TrimSpace(string(data))
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}
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return stdout, stderr
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}
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func init() {
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utilruntime.Must(RegisterModule("command", ModuleCommand))
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utilruntime.Must(RegisterModule("shell", ModuleCommand))
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}
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