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6ba4d21765
The additional commands (mounter, gcp-credentials-provider) are needed for E2E node testing. This change makes e2e_node.test entirely self-contained. Copying the commands' code into separate packages is temporary and only done to avoid touching them while it is still unclear whether this approach will work out. Besides avoiding changes to the build rules, bundling the functionality also has a slight size advantage: the size of e2e_node.test increases by 10KB, whereas the other two separate commands would add 10MB.
97 lines
3.1 KiB
Go
97 lines
3.1 KiB
Go
/*
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Copyright The Kubernetes 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 mounter is a temporary copy of cluster/gce/gci/mounter for use in the e2e_node
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// binary itself. If that approach works out, cluster/gce/gci/mounter will be refactored
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// to remove the code duplication, otherwise this will get reverted.
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package mounter
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import (
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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const (
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// Location of the mount file to use
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chrootCmd = "chroot"
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mountCmd = "mount"
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mountBin = "/bin/mount"
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rootfs = "rootfs"
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nfsRPCBindErrMsg = "mount.nfs: rpc.statd is not running but is required for remote locking.\nmount.nfs: Either use '-o nolock' to keep locks local, or start statd.\nmount.nfs: an incorrect mount option was specified\n"
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rpcBindCmd = "/sbin/rpcbind"
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defaultRootfs = "/home/kubernetes/containerized_mounter/rootfs"
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)
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func Main() {
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if len(os.Args) < 2 {
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fmt.Fprintf(os.Stderr, "Command failed: must provide a command to run.\n")
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return
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}
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path, _ := filepath.Split(os.Args[0])
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rootfsPath := filepath.Join(path, rootfs)
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if _, err := os.Stat(rootfsPath); os.IsNotExist(err) {
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rootfsPath = defaultRootfs
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}
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command := os.Args[1]
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switch command {
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case mountCmd:
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mountErr := mountInChroot(rootfsPath, os.Args[2:])
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if mountErr != nil {
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fmt.Fprintf(os.Stderr, "Mount failed: %v", mountErr)
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os.Exit(1)
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}
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default:
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fmt.Fprintf(os.Stderr, "Unknown command, must be %s", mountCmd)
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os.Exit(1)
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}
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}
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// mountInChroot runs mount within chroot with the passing root directory
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func mountInChroot(rootfsPath string, args []string) error {
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if _, err := os.Stat(rootfsPath); os.IsNotExist(err) {
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return fmt.Errorf("path <%s> does not exist", rootfsPath)
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}
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args = append([]string{rootfsPath, mountBin}, args...)
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output, err := exec.Command(chrootCmd, args...).CombinedOutput()
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if err == nil {
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return nil
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}
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if !strings.EqualFold(string(output), nfsRPCBindErrMsg) {
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// Mount failed but not because of RPC bind error
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return fmt.Errorf("mount failed: %v\nMounting command: %s\nMounting arguments: %v\nOutput: %s", err, chrootCmd, args, string(output))
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}
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// Mount failed because it is NFS V3 and we need to run rpcBind
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output, err = exec.Command(chrootCmd, rootfsPath, rpcBindCmd, "-w").CombinedOutput()
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if err != nil {
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return fmt.Errorf("mount issued for NFS V3 but unable to run rpcbind:\n Output: %s\n Error: %v", string(output), err)
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}
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// Rpcbind is running, try mounting again
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output, err = exec.Command(chrootCmd, args...).CombinedOutput()
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if err != nil {
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return fmt.Errorf("mount failed for NFS V3 even after running rpcBind %s, %v", string(output), err)
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}
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return nil
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}
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