docker service update --host-add does not support list of hosts, though documentation specifies it does #50769
Description
Description
docker service update --host-add host1:192.168.1.111,host2:192.168.1.222 my_service returns an invalid argument error 'invalid argument "host1:192.168.1.111,host2:192.168.1.222" for "--host-add" flag: invalid IP address in add-host: "192.168.1.111,host2:192.168.1.222"
It should probably behave the same way as --host-rm since "docker service update --host-rm host1:192.168.1.111,host2:192.168.1.222" my_service does work.
This enables the workflow of updating existing set host ips with "--host-rm host1:192.168.1.111,host2:192.168.1.222 --host-add host1:192.168.1.112,host2:192.168.1.223"
Reproduce
docker service update --host-add host1:192.168.1.111,host2:192.168.1.222 my_service
Expected behavior
docker service update should add the list of hosts to the hosts list for the service
docker version
Client: Docker Engine - Community
Version: 28.3.2
API version: 1.51
Go version: go1.24.5
Git commit: 578ccf6
Built: Wed Jul 9 16:13:45 2025
OS/Arch: linux/amd64
Context: default
Server: Docker Engine - Community
Engine:
Version: 28.3.2
API version: 1.51 (minimum version 1.24)
Go version: go1.24.5
Git commit: e77ff99
Built: Wed Jul 9 16:13:45 2025
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.7.27
GitCommit: 05044ec0a9a75232cad458027ca83437aae3f4da
runc:
Version: 1.2.5
GitCommit: v1.2.5-0-g59923ef
docker-init:
Version: 0.19.0
GitCommit: de40ad0docker info
Client: Docker Engine - Community
Version: 28.3.2
Context: default
Debug Mode: false
Plugins:
buildx: Docker Buildx (Docker Inc.)
Version: v0.25.0
Path: /usr/libexec/docker/cli-plugins/docker-buildx
compose: Docker Compose (Docker Inc.)
Version: v2.38.2
Path: /usr/libexec/docker/cli-plugins/docker-compose
Server:
Containers: 51
Running: 25
Paused: 0
Stopped: 26
Images: 25
Server Version: 28.3.2
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: json-file
Cgroup Driver: systemd
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
CDI spec directories:
/etc/cdi
/var/run/cdi
Swarm: active
NodeID: hkaj4s6xt83wlf3h0xy052a51
Is Manager: true
ClusterID: n3w51dj9khz3bdglprioou3x5
Managers: 3
Nodes: 3
Default Address Pool: 172.20.0.0/14
SubnetSize: 24
Data Path Port: 4789
Orchestration:
Task History Retention Limit: 5
Raft:
Snapshot Interval: 10000
Number of Old Snapshots to Retain: 0
Heartbeat Tick: 1
Election Tick: 10
Dispatcher:
Heartbeat Period: 5 seconds
CA Configuration:
Expiry Duration: 3 months
Force Rotate: 0
Autolock Managers: false
Root Rotation In Progress: false
Node Address: 10.17.24.10
Manager Addresses:
10.17.24.10:2377
10.17.24.11:2377
10.17.24.12:2377
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 05044ec0a9a75232cad458027ca83437aae3f4da
runc version: v1.2.5-0-g59923ef
init version: de40ad0
Security Options:
apparmor
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.8.0-71-generic
Operating System: Ubuntu 24.04.2 LTS
OSType: linux
Architecture: x86_64
CPUs: 16
Total Memory: 78.45GiB
Name: dfw-web-docker-01
ID: 1760dcfe-72e8-466c-95cf-336563508cb8
Docker Root Dir: /mnt/docker/data
Debug Mode: false
Experimental: false
Insecure Registries:
::1/128
127.0.0.0/8
Live Restore Enabled: false
Default Address Pools:
Base: 172.16.0.0/14, Size: 22Additional Info
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