docs: service create: document os/arch constraints and more examples

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit f26e9a3a61)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

docs/reference/commandline/service_create.md

@@ -673,10 +673,12 @@ expression (AND match). Constraints can match node or Docker Engine labels as
 follows:
 
 node attribute       | matches                        | example
--------------------|--------------------------|-----------------------------------------------
+---------------------|--------------------------------|-----------------------------------------------
 `node.id`            | Node ID                        | `node.id==2ivku8v2gvtg4`
 `node.hostname`      | Node hostname                  | `node.hostname!=node-2`
-`node.role`        | Node role                | `node.role==manager`
+`node.role`          | Node role (`manager`/`worker`) | `node.role==manager`
+`node.platform.os`   | Node operating system          | `node.platform.os==windows`
+`node.platform.arch` | Node architecture              | `node.platform.arch==x86_64`
 `node.labels`        | User-defined node labels       | `node.labels.security==high`
 `engine.labels`      | Docker Engine's labels         | `engine.labels.operatingsystem==ubuntu-14.04`
 
@@ -691,10 +693,45 @@ node type label equals queue:
 ```bash
 $ docker service create \
   --name redis_2 \
+  --constraint node.platform.os==linux \
   --constraint node.labels.type==queue \
   redis:3.0.6
 ```
 
+If the service constraints exclude all nodes in the cluster, a message is printed
+that no suitable node is found, but the scheduler will start a reconciliation
+loop and deploy the service once a suitable node becomes available.
+
+In the example below, no node satisfying the constraint was found, causing the
+service to not reconcile with the desired state:
+
+```bash
+$ docker service create \
+  --name web \
+  --constraint node.labels.region==east \
+  nginx:alpine
+
+lx1wrhhpmbbu0wuk0ybws30bc
+overall progress: 0 out of 1 tasks
+1/1: no suitable node (scheduling constraints not satisfied on 5 nodes)
+
+$ docker service ls
+ID                  NAME     MODE         REPLICAS   IMAGE               PORTS
+b6lww17hrr4e        web      replicated   0/1        nginx:alpine
+```
+
+After adding the `region=east` label to a node in the cluster, the service
+reconciles, and the desired number of replicas are deployed:
+
+```bash
+$ docker node update --label-add region=east yswe2dm4c5fdgtsrli1e8ya5l 
+yswe2dm4c5fdgtsrli1e8ya5l
+
+$ docker service ls
+ID                  NAME     MODE         REPLICAS   IMAGE               PORTS
+b6lww17hrr4e        web      replicated   1/1        nginx:alpine
+```
+
 ### Specify service placement preferences (--placement-pref)
 
 You can set up the service to divide tasks evenly over different categories of