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/*
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Copyright © 2020 The k3d Author(s)
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package tools
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import (
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"fmt"
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"sync"
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"time"
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k3dc "github.com/rancher/k3d/pkg/cluster"
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"github.com/rancher/k3d/pkg/runtimes"
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k3d "github.com/rancher/k3d/pkg/types"
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log "github.com/sirupsen/logrus"
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)
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// LoadImagesIntoCluster starts up a k3d tools container for the selected cluster and uses it to export
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// images from the runtime to import them into the nodes of the selected cluster
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func LoadImagesIntoCluster(runtime runtimes.Runtime, images []string, cluster *k3d.Cluster, keepTarball bool) error {
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cluster, err := k3dc.GetCluster(cluster, runtime)
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if err != nil {
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log.Errorf("Failed to get cluster '%s'", cluster.Name)
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return err
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}
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if cluster.Network.Name == "" {
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return fmt.Errorf("Failed to get network for cluster '%s'", cluster.Name)
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}
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if _, ok := cluster.Nodes[0].Labels["k3d.cluster.volumes.imagevolume"]; !ok { // TODO: add failover solution
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return fmt.Errorf("Failed to find image volume for cluster '%s'", cluster.Name)
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}
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imageVolume := cluster.Nodes[0].Labels["k3d.cluster.volumes.imagevolume"]
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// create tools node to export images
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log.Infoln("Starting k3d-tools node...")
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toolsNode, err := startToolsNode( // TODO: re-use existing container
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runtime,
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cluster,
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cluster.Network.Name,
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[]string{
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fmt.Sprintf("%s:%s", imageVolume, k3d.DefaultImageVolumeMountPath),
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fmt.Sprintf("%s:%s", runtime.GetRuntimePath(), runtime.GetRuntimePath()),
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})
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if err != nil {
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log.Errorf("Failed to start tools container for cluster '%s'", cluster.Name)
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}
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// save image to tarfile in shared volume
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log.Infoln("Saving images...")
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tarName := fmt.Sprintf("%s/k3d-%s-images-%s.tar", k3d.DefaultImageVolumeMountPath, cluster.Name, time.Now().Format("20060102150405")) // FIXME: change
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if err := runtime.ExecInNode(toolsNode, append([]string{"./k3d-tools", "save-image", "-d", tarName}, images...)); err != nil {
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log.Errorf("Failed to save images in tools container for cluster '%s'", cluster.Name)
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return err
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}
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// import image in each node
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log.Infoln("Importing images into nodes...")
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var importWaitgroup sync.WaitGroup
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for _, node := range cluster.Nodes {
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importWaitgroup.Add(1)
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go func(node *k3d.Node, wg *sync.WaitGroup) {
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log.Infof("Importing images into node '%s'...", node.Name)
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if err := runtime.ExecInNode(node, []string{"ctr", "image", "import", tarName}); err != nil {
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log.Errorf("Failed to import images in node '%s'", node.Name)
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log.Errorln(err)
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}
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wg.Done()
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}(node, &importWaitgroup)
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}
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importWaitgroup.Wait()
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// remove tarball
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if !keepTarball {
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log.Infoln("Removing the tarball...")
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if err := runtime.ExecInNode(cluster.Nodes[0], []string{"rm", "-f", tarName}); err != nil { // TODO: do this in tools node (requires rm)
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log.Errorf("Failed to delete tarball '%s'", tarName)
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log.Errorln(err)
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}
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}
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// delete tools container
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log.Infoln("Removing k3d-tools node...")
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if err := runtime.DeleteNode(toolsNode); err != nil {
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log.Errorln("Failed to delete tools node '%s': Try to delete it manually", toolsNode.Name)
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}
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log.Infoln("...Done")
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return nil
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}
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// startToolsNode will start a new k3d tools container and connect it to the network of the chosen cluster
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func startToolsNode(runtime runtimes.Runtime, cluster *k3d.Cluster, network string, volumes []string) (*k3d.Node, error) {
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node := &k3d.Node{
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Name: fmt.Sprintf("%s-%s-tools", k3d.DefaultObjectNamePrefix, cluster.Name),
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Image: k3d.DefaultToolsContainerImage,
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Role: k3d.NoRole,
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Volumes: volumes,
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Network: network,
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Cmd: []string{},
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Args: []string{"noop"},
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}
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if err := runtime.CreateNode(node); err != nil {
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log.Errorf("Failed to create tools container for cluster '%s'", cluster.Name)
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return node, err
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}
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return node, nil
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}
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