moby: Failed to execute child process "dbus-launch" (No such file or directory)

Description

Steps to reproduce the issue:

1. install ubuntu 14.04.5 on kvm host
2. install docker-engine 1.12.5 or 17.05.0-ce, and dependencies ( libsystemd-journal0 libltdl7)
3. run docker login a.b.c.d
4. error occurred:

error getting credentials - err: exit status 1, out: `Failed to execute child process “dbus-launch” (No such file or directory)

Additional information you deem important (e.g. issue happens only occasionally): i have many kvm hosts created from the same ubuntu 14.04.5 image, some hosts have this error, but the others don’t. and i also created some ubuntu hosts on virtualbox with ubuntu 14.04 image, all these hosts don’t have this error, and in these ubuntu hosts dbus-launch command doesn’t exist Output of docker version:

Client:
 Version:      1.12.5
 API version:  1.24
 Go version:   go1.6.4
 Git commit:   7392c3b
 Built:        Fri Dec 16 02:30:42 2016
 OS/Arch:      linux/amd64

Server:
 Version:      1.12.5
 API version:  1.24
 Go version:   go1.6.4
 Git commit:   7392c3b
 Built:        Fri Dec 16 02:30:42 2016
 OS/Arch:      linux/amd64

Client:
 Version:      17.05.0-ce
 API version:  1.29
 Go version:   go1.7.5
 Git commit:   89658be
 Built:        Thu May  4 22:06:06 2017
 OS/Arch:      linux/amd64

Server:
 Version:      17.05.0-ce
 API version:  1.29 (minimum version 1.12)
 Go version:   go1.7.5
 Git commit:   89658be
 Built:        Thu May  4 22:06:06 2017
 OS/Arch:      linux/amd64
 Experimental: false

Output of docker info:

Containers: 1
 Running: 0
 Paused: 0
 Stopped: 1
Images: 8
Server Version: 1.12.5
Storage Driver: overlay2
 Backing Filesystem: extfs
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: null bridge overlay host
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Security Options: apparmor
Kernel Version: 4.4.0-31-generic
Operating System: Ubuntu 14.04.5 LTS
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.859 GiB
Name: ubuntu14-147
ID: 4BBY:GOYO:WZN5:JDBI:4V42:A4BM:2V3R:YKLZ:EEYK:G7D5:HUXE:CLOK
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Insecure Registries:
 127.0.0.0/8

Containers: 1
 Running: 0
 Paused: 0
 Stopped: 1
Images: 8
Server Version: 17.05.0-ce
Storage Driver: overlay2
 Backing Filesystem: extfs
 Supports d_type: true
 Native Overlay Diff: false
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9048e5e50717ea4497b757314bad98ea3763c145
runc version: 9c2d8d184e5da67c95d601382adf14862e4f2228
init version: 949e6fa
Security Options:
 apparmor
Kernel Version: 4.4.0-31-generic
Operating System: Ubuntu 14.04.5 LTS
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.859GiB
Name: ubuntu14-147
ID: 4BBY:GOYO:WZN5:JDBI:4V42:A4BM:2V3R:YKLZ:EEYK:G7D5:HUXE:CLOK
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false

WARNING: No swap limit support

output of lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.5 LTS
Release:        14.04
Codename:       trusty