Docker stack deploy creates random tasks, and doesn't clean up, in drain mode

Description

If a node is in "drain" mode, tasks can be orphaned, and are not cleaned up. I noticed this when using docker stack deploy, but possibly there's other ways to arrive in this situation

Steps to reproduce the issue:

On a single-node swarm, put the node in availability drain:

docker node update --availability=drain $(docker node ls --quiet)

Deploy a stack:

docker stack deploy -c- mystack <<EOF
version: "3.5"
services:
  web:
    image: nginx:alpine
    ports:
      - "80:80"
EOF

Watch the output of docker stack ps mystack:

docker stack ps mystack

ID                  NAME                          IMAGE               NODE                DESIRED STATE       CURRENT STATE                    ERROR                              PORTS
l642i9p5gs4c        mystack_web.1                 nginx:alpine                            Running             Pending less than a second ago   "no suitable node (1 node not …"   
0vqk2i4xdgeg        pnsu2xb5xavnw5q7vmabygz8y.1   nginx:alpine                            Remove              Pending 5 minutes ago            "no suitable node (1 node not …"

Remove the stack:

docker stack rm mystack

And re-deploy the stack

docker stack deploy -c- mystack <<EOF
version: "3.5"
services:
  web:
    image: nginx:alpine
    ports:
      - "80:80"
EOF

Notice that one more randomly named task is added:

docker stack ps mystack

ID                  NAME                          IMAGE               NODE                DESIRED STATE       CURRENT STATE                    ERROR                              PORTS
v99e6svzbw1l        mystack_web.1                 nginx:alpine                            Running             Pending less than a second ago   "no suitable node (1 node not …"   
l642i9p5gs4c        ma35f4bhbygnw7exbrkqw3oct.1   nginx:alpine                            Remove              Pending about a minute ago       "no suitable node (1 node not …"   
0vqk2i4xdgeg        pnsu2xb5xavnw5q7vmabygz8y.1   nginx:alpine                            Remove              Pending 7 minutes ago            "no suitable node (1 node not …"

Describe the results you received:

Each re-deploy adds a new task with desired state Remove. These tasks are never removed as long as the node is in "drain" mode, even if the service is removed.

Note that no containers are seen for those tasks
Updating the node to active removes the old tasks
docker service ps does not show these tasks;

$ docker service ps mystack_web

ID                  NAME                IMAGE               NODE                DESIRED STATE       CURRENT STATE           ERROR                              PORTS
hhzfa05q7kqf        mystack_web.1       nginx:alpine                            Running             Pending 6 minutes ago   "no suitable node (1 node not …"

Each task also belongs to a different service;

$ docker inspect --format '{{.ServiceID}}' $(docker stack ps -q mystack)
kgb2xubypxq0zqht51bvy9tlj
koxfo2b8ers4jpy3vebvcygxj
ma35f4bhbygnw7exbrkqw3oct
pnsu2xb5xavnw5q7vmabygz8y

Describe the results you expected:

Tasks to be removed

Additional information you deem important (e.g. issue happens only occasionally):

Output of docker version:

Client:
 Version:   18.02.0-ce
 API version:   1.36
 Go version:    go1.9.3
 Git commit:    fc4de44
 Built: Wed Feb  7 21:13:05 2018
 OS/Arch:   darwin/amd64
 Experimental:  true
 Orchestrator:  swarm

Server:
 Engine:
  Version:  18.02.0-ce
  API version:  1.36 (minimum version 1.12)
  Go version:   go1.9.3
  Git commit:   fc4de44
  Built:    Wed Feb  7 21:20:15 2018
  OS/Arch:  linux/amd64
  Experimental: true

Output of docker info:

Containers: 1
 Running: 0
 Paused: 0
 Stopped: 1
Images: 361
Server Version: 18.02.0-ce
Storage Driver: overlay2
 Backing Filesystem: extfs
 Supports d_type: true
 Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: bridge host ipvlan macvlan null overlay
 Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog
Swarm: active
 NodeID: oifk2p0hd4tvlb62uf76womx0
 Is Manager: true
 ClusterID: emg7r0j0ou50nqgt8egutjdhl
 Managers: 1
 Nodes: 1
 Orchestration:
  Task History Retention Limit: 5
 Raft:
  Snapshot Interval: 10000
  Number of Old Snapshots to Retain: 0
  Heartbeat Tick: 1
  Election Tick: 3
 Dispatcher:
  Heartbeat Period: 5 seconds
 CA Configuration:
  Expiry Duration: 3 months
  Force Rotate: 0
 Autolock Managers: false
 Root Rotation In Progress: false
 Node Address: 192.168.65.3
 Manager Addresses:
  192.168.65.3:2377
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 9b55aab90508bd389d7654c4baf173a981477d55
runc version: 9f9c96235cc97674e935002fc3d78361b696a69e
init version: 949e6fa
Security Options:
 seccomp
  Profile: default
Kernel Version: 4.9.75-linuxkit-aufs
Operating System: Docker for Mac
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 1.952GiB
Name: linuxkit-025000000001
ID: NAGV:GKNJ:7XC7:YWGV:4JLV:3RWY:TJEQ:BSHI:CYHK:XHOH:E7W3:GSEY
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): true
 File Descriptors: 38
 Goroutines: 160
 System Time: 2018-02-14T11:17:22.172562767Z
 EventsListeners: 2
HTTP Proxy: docker.for.mac.http.internal:3128
HTTPS Proxy: docker.for.mac.http.internal:3129
Registry: https://index.docker.io/v1/
Labels:
Experimental: true
Insecure Registries:
 127.0.0.0/8
Registry Mirrors:
 http://localhost:5000/
Live Restore Enabled: false

Additional environment details (AWS, VirtualBox, physical, etc.):

Docker for Mac

docker / cli

Docker stack deploy creates random tasks, and doesn't clean up, in drain mode #877