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api: Omit Cluster, Nodes, and Managers from swarm info when unavailable 

Currently these fields are included in the response JSON with zero
values. It's better not to include them if the information is
unavailable (for example, on a worker node).

This turns Cluster into a pointer so that it can be left out.

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
This commit is contained in:
Aaron Lehmann 2017-03-28 14:20:25 -07:00
parent d14a4d4231
commit e6445629d7
1 changed files with 1 additions and 1 deletions
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2
command/system/info.go
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@ -97,7 +97,7 @@ func prettyPrintInfo(dockerCli *command.DockerCli, info types.Info) error {
fmt.Fprintf(dockerCli.Out(), " Error: %v\n", info.Swarm.Error)
}
fmt.Fprintf(dockerCli.Out(), " Is Manager: %v\n", info.Swarm.ControlAvailable)
if info.Swarm.ControlAvailable && info.Swarm.Error == "" && info.Swarm.LocalNodeState != swarm.LocalNodeStateError {
if info.Swarm.Cluster != nil && info.Swarm.ControlAvailable && info.Swarm.Error == "" && info.Swarm.LocalNodeState != swarm.LocalNodeStateError {
fmt.Fprintf(dockerCli.Out(), " ClusterID: %s\n", info.Swarm.Cluster.ID)
fmt.Fprintf(dockerCli.Out(), " Managers: %d\n", info.Swarm.Managers)
fmt.Fprintf(dockerCli.Out(), " Nodes: %d\n", info.Swarm.Nodes)