Cluster Health (3 unassigned shards)

[michaeldtaylor (Michael Taylor)]

I've had some problems with my cluster when I added a simple synonyms bundle and clicked update.

Long story short it now looks more stable, but I have 3x unassigned shards across 2x indices:

.security (1)
my_index (2)

My cluster is multi-datacenter and has the following instances:

instance-0000000005
instance-0000000006
tiebreaker-0000000004

I have tried to allocate them directly using Kibana and the command:

POST /_cluster/reroute
{
  "commands": [{
    "allocate": {
        "index": ".security",
        "shard": 0,
        "node": "instance-0000000005",
        "allow_primary": true
      }
  }]
}

POST /_cluster/reroute
{
  "commands": [{
    "allocate": {
        "index": "my_index",
        "shard": 0,
        "node": "instance-0000000005",
        "allow_primary": true
      }
  }]
}

But I get:

{
  "error": {
    "root_cause": [
      {
        "type": "unknown_named_object_exception",
        "reason": "Unknown AllocationCommand [allocate]",
        "line": 3,
        "col": 17
      }
    ],
    "type": "parsing_exception",
    "reason": "[cluster_reroute] failed to parse field [commands]",
    "line": 3,
    "col": 17,
    "caused_by": {
      "type": "unknown_named_object_exception",
      "reason": "Unknown AllocationCommand [allocate]",
      "line": 3,
      "col": 17
    }
  },
  "status": 400
}

How do i get these shards assigned using Elastic Cloud?