github.com/containerd/nerdctl@v1.7.7/pkg/composer/orphans.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package composer
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  
    23  	"github.com/containerd/containerd"
    24  	"github.com/containerd/nerdctl/pkg/composer/serviceparser"
    25  	"github.com/containerd/nerdctl/pkg/labels"
    26  )
    27  
    28  func (c *Composer) getOrphanContainers(ctx context.Context, parsedServices []*serviceparser.Service) ([]containerd.Container, error) {
    29  	// get all running containers for project
    30  	var filters = []string{fmt.Sprintf("labels.%q==%s", labels.ComposeProject, c.project.Name)}
    31  	containers, err := c.client.Containers(ctx, filters...)
    32  	if err != nil {
    33  		return nil, err
    34  	}
    35  
    36  	parsedSvcNames := make(map[string]bool)
    37  	for _, svc := range parsedServices {
    38  		parsedSvcNames[svc.Unparsed.Name] = true
    39  	}
    40  
    41  	var orphanContainers []containerd.Container
    42  	for _, container := range containers {
    43  		// orphan containers doesn't have a `ComposeService` label corresponding
    44  		// to any name of given services.
    45  		containerLabels, err := container.Labels(ctx)
    46  		if err != nil {
    47  			return nil, fmt.Errorf("error getting container labels: %s", err)
    48  		}
    49  		containerSvc := containerLabels[labels.ComposeService]
    50  		if inServices := parsedSvcNames[containerSvc]; !inServices {
    51  			orphanContainers = append(orphanContainers, container)
    52  		}
    53  	}
    54  
    55  	return orphanContainers, nil
    56  }