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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