error="Error response from daemon: client version 1.42 is too new

[windofbarcelona]

my docker version is:
`Client: Docker Engine - Community
Version: 20.10.10
API version: 1.41
Go version: go1.16.9
Git commit: b485636
Built: Mon Oct 25 07:42:59 2021
OS/Arch: linux/amd64
Context: default
Experimental: true

Server: Docker Engine - Community
Engine:
Version: 20.10.10
API version: 1.41 (minimum version 1.12)
Go version: go1.16.9
Git commit: e2f740d
Built: Mon Oct 25 07:41:08 2021
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.4.11
GitCommit: 5b46e404f6b9f661a205e28d59c982d3634148f8
runc:
Version: 1.0.2
GitCommit: v1.0.2-0-g52b36a2
docker-init:
Version: 0.19.0
GitCommit: de40ad0
`

my swarmd version: swarmd github.com/docker/swarmkit v1.12.0-2276-g63033102.m

when my install swarmkit, there are no errors，but when i want to Initialize the first node by :
$ swarmd -d /tmp/node-1 --listen-control-api /tmp/node-1/swarm.sock --hostname node-1
there has been an error:
ERRO[0000] agent: node description unavailable agent="&{0xc0000f0180 0xc0001b6220 [] {0 0} <nil>}" error="Error response from daemon: client version 1.42 is too new. Maximum supported API version is 1.41" module=node/agent node.id=ynf1y34usrk32ch3r3znt0l6x

i try to export DOCKER_API_VERSION=1.41,but it doesn't work, and every service is rejected

what should i do....

[akerouanton]

Hi @windofbarcelona,

Neither client.FromEnv nor client.NegotiateAPIVersion are used by swarmd when it initializes its API client, so setting DOCKER_API_VERSION won't help here.

Could you detail a bit what you're trying to do? It's a bit weird to see someone use swarmd directly.

[windofbarcelona]

Hi @windofbarcelona,

Neither client.FromEnv nor client.NegotiateAPIVersion are used by swarmd when it initializes its API client, so setting DOCKER_API_VERSION won't help here.

Could you detail a bit what you're trying to do? It's a bit weird to see someone use swarmd directly.

I'm trying to change the scheduling policy of swarmkit,so i download the source code of the swarmkit.firstly, i run a example according to the README.md,and an error has occured

[akerouanton]

In that case, you can add these two functions to the client options and submit a PR (although I don't know if it'd be accepted by maintainers).

[windofbarcelona]

In that case, you can add these two functions to the client options and submit a PR (although I don't know if it'd be accepted by maintainers).

thank you,i solved this problem,i change the DefaultVersion in [common.go] (https://github.com/docker/swarmkit/blob/master/vendor/github.com/docker/docker/api/common.go) to 1.41,and then services is running

[thaJeztah]

In that case, you can add these two functions to the client options and submit a PR (although I don't know if it'd be accepted by maintainers).

I think it would make sense to add options to make swarmd to perform version negotiation. I'm not a maintainer on this repository (officially), but happy to review a PR for that