moby: docker network create problem

@pcgeek86 @codercotton @bhaskarcloudyuga The issue was originally filed for 1.9.1 . To begin with, it will help if you can share the docker version that you are trying. The error message Error response from daemon: datastore for scope "global" is not initialized indicates that external kv-store is not configured or not reachable.

Having said that, docker 1.12 introduced swarm-mode and with that, overlay network doesnt require an external kv-store any more. So, if you are trying 1.12 and you are encountering this error, that means you might have missed docker swarm init command to initialize the swarm-mode.

I too am having issues creating an overlay network. Instead of docker-machine I have followed the directions on https://docs.docker.com/swarm/install-manual/ for creating hosts in AWS (except only creating 1 manager node). I managed to successfully run swarm manage on the manager node and swarm join on the worker nodes, passing a functional consul backend to each of them.

From the manager node:

$ docker -H :4000 info
Containers: 3
 Running: 2
 Paused: 0
 Stopped: 1
Images: 3
Server Version: swarm/1.2.5
Role: primary
Strategy: spread
Filters: health, port, containerslots, dependency, affinity, constraint
Nodes: 2
 biomed-swarm-node0: ****:2375
  └ ID: LM2A:YYM4:KNPE:66DS:2GGU:5VBT:5H25:7MSQ:FCKH:Q2NY:FKP6:GP2G
  └ Status: Healthy
  └ Containers: 2 (1 Running, 0 Paused, 1 Stopped)
  └ Reserved CPUs: 0 / 2
  └ Reserved Memory: 0 B / 7.67 GiB
  └ Labels: kernelversion=3.13.0-92-generic, operatingsystem=Ubuntu 14.04.5 LTS, storagedriver=aufs
  └ UpdatedAt: 2016-09-24T02:08:34Z
  └ ServerVersion: 1.12.1
 biomed-swarm-node1: ****:2375
  └ ID: HRAG:I5HI:2U76:HIXO:YPZG:OJ6S:YNIW:Q2Y6:SXBZ:RIGX:SFRE:TUAW
  └ Status: Healthy
  └ Containers: 1 (1 Running, 0 Paused, 0 Stopped)
  └ Reserved CPUs: 0 / 2
  └ Reserved Memory: 0 B / 7.67 GiB
  └ Labels: kernelversion=3.13.0-92-generic, operatingsystem=Ubuntu 14.04.5 LTS, storagedriver=aufs
  └ UpdatedAt: 2016-09-24T02:08:27Z
  └ ServerVersion: 1.12.1
Plugins:
 Volume: 
 Network: 
Swarm: 
 NodeID: 
 Is Manager: false
 Node Address: 
Security Options:
Kernel Version: 3.13.0-92-generic
Operating System: linux
Architecture: amd64
CPUs: 4
Total Memory: 15.34 GiB
Name: 5a6b2000ebc2
Docker Root Dir: 
Debug Mode (client): false
Debug Mode (server): false
WARNING: No kernel memory limit support

docker -H :4000 run hello-world works fine and I can tell that the swarm containers are communicating with the Consul server

$ curl http://<consul_ip>:8500/v1/kv/?recurse
[{"LockIndex":4,"Key":"docker/swarm/leader","Flags":3304740253564472344,"Value":"MTAuMTAuNC44OjQwMDA=","Session":"81369ec3-d286-ad35-2951-4755b51e05f1","CreateIndex":16587273,"ModifyIndex":16612134},{"LockIndex":0,"Key":"docker/swarm/nodes","Flags":3304740253564472344,"Value":null,"CreateIndex":16587271,"ModifyIndex":16587271},{"LockIndex":0,"Key":"docker/swarm/nodes/****:2375","Flags":3304740253564472344,"Value":"MTAuMTAuNC43OjIzNzU=","Session":"ef33494d-7514-7c3f-55d8-6dbdafdbf0a6","CreateIndex":16609487,"ModifyIndex":16613217},{"LockIndex":0,"Key":"docker/swarm/nodes/****:2375","Flags":3304740253564472344,"Value":"MTAuMTAuNC45OjIzNzU=","Session":"cd453857-69b4-5414-b284-ef3eb81da515","CreateIndex":16609483,"ModifyIndex":16613216}]

However, when I try to create the network:

$ docker -H :4000 network create -d overlay swarm_network
Error response from daemon: Error response from daemon: datastore for scope "global" is not initialized

All nodes are running the same docker version with -H 0.0.0.02375 passed to dockerd. $ docker -v Docker version 1.12.1, build 23cf638

@dminca in that case, it’s expected; for overlay networking you need to either setup an external k/v store or (if you want the new services feature in 1.12) use swarm mode; but swarm scopes overlay networks cannot be used for “docker run”, only for services

+1 same issue here, and no way to go. 💔