mirror of https://github.com/docker/docs.git
add error message
Signed-off-by: Victor Vieux <vieux@docker.com>
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@ -142,6 +142,11 @@ func (n *node) updateSpecs() error {
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if err != nil {
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return err
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}
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if info.NCPU == 0 || info.MemTotal == 0 {
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return fmt.Errorf("cannot get resources for this node, make sure %s is a Docker Engine, not a Swarm manager", n.addr)
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}
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// Older versions of Docker don't expose the ID field and are not supported
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// by Swarm. Catch the error ASAP and refuse to connect.
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if len(info.ID) == 0 {
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