forked from kubernetes-sigs/kind
/
run.go
56 lines (47 loc) · 1.74 KB
/
run.go
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/*
Copyright 2018 The Kubernetes 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 docker
import (
"fmt"
"regexp"
log "github.com/sirupsen/logrus"
"sigs.k8s.io/kind/pkg/exec"
)
// Docker container IDs are hex, more than one character, and on their own line
var containerIDRegex = regexp.MustCompile("^[a-f0-9]+$")
// Run creates a container with "docker run", with some error handling
// it will return the ID of the created container if any, even on error
func Run(image string, runArgs []string, containerArgs []string) (id string, err error) {
args := []string{"run"}
args = append(args, runArgs...)
args = append(args, image)
args = append(args, containerArgs...)
cmd := exec.Command("docker", args...)
output, err := exec.CombinedOutputLines(cmd)
if err != nil {
// log error output if there was any
for _, line := range output {
log.Error(line)
}
return "", err
}
// if docker created a container the id will be the first line and match
// validate the output and get the id
if len(output) < 1 {
return "", fmt.Errorf("failed to get container id, received no output from docker run")
}
if !containerIDRegex.MatchString(output[0]) {
return "", fmt.Errorf("failed to get container id, output did not match: %v", output)
}
return output[0], nil
}