DC/OS dynamic reservation dosen't work

[caogaojin]

Hi list,

I’m currently using dynamic reservation mechanism with mesosphere/DCOS 1.7, the 
opensourced version, 
and something wired just happened. I tried to setup a new marathon service from 
the universe repo, 
and i did a slight modification, setting mesos_role to `dev`. i also turned off 
mesos anthentication 
mechenism. 

My steps are:

First i tried to reserve 2 cpu and 1743 ram to `dev` role using http endpoint, 
and it works:
# curl -i -d slaveId=e6d590b1-5f2d-4be9-93fd-2fac364584cf-S11 \
-d resources='[
{
            "name": "cpus",
            "type": "SCALAR",
            "scalar": {
              "value": 2.0
            },
            "role": "dev",
              "reservation": {
              }

},
{
            "name": "mem",
            "type": "SCALAR",
            "scalar": {
              "value": 1024.0

            },
            "role": "dev",
              "reservation": {
              }
}
]' -X POST http://10.132.46.81:5050/unreserve

Second, the slave shows following infomation:
# curl http://10.132.46.81/mesos/slaves
reserved_resources_full: {
dev: [
{
name: "cpus",
type: "SCALAR",
scalar: {
value: 2
},
role: "dev",
reservation: { }
},
{
name: "mem",
type: "SCALAR",
scalar: {
value: 1743
},
role: "dev",
reservation: { }
}
]
},

Third, i tried to run nginx using the new marathon service, which i also set 
the task only accept `dev` resources, 

ID: /nginx
...
Resource Roles:  dev

4.  on marathon ui i just see the waiting status, which means there’s no 
suitable resource offer, marathon reports:

Insufficient resources for [/nginx] (need cpus=1.0, mem=128.0, disk=0.0, 
ports=(1 dynamic), available in offer: [id { value: 
"e6d590b1-5f2d-4be9-93fd-2fac364584cf-O7476" } framework_id { value: 
"e6d590b1-5f2d-4be9-93fd-2fac364584cf-0006" } slave_id { value: 
"e6d590b1-5f2d-4be9-93fd-2fac364584cf-S11" } hostname: "10.132.46.84" resources 
{ name: "ports" type: RANGES ranges { range { begin: 8182 end: 32000 } } role: 
"dev" reservation { } } resources { name: "cpus" type: SCALAR scalar { value: 
2.0 } role: "dev" reservation { } } resources { name: "mem" type: SCALAR scalar 
{ value: 1743.0 } role: "dev" reservation { } } resources { name: "ports" type: 
RANGES ranges { range { begin: 1025 end: 2180 } range { begin: 2182 end: 3887 } 
range { begin: 3889 end: 5049 } range { begin: 5052 end: 6326 } range { begin: 
6328 end: 8079 } range { begin: 8082 end: 8180 } } role: "*" } resources { 
name: "disk" type: SCALAR scalar { value: 41497.0 } role: "*" } resources { 
name: "cpus" type: SCALAR scalar { value: 1.0 } role: "*" } resources { name: 
"mem" type: SCALAR scalar { value: 896.0 } role: "*" } url { scheme: "http" 
address { hostname: "10.132.46.84" ip: "10.132.46.84" port: 5051 } path: 
"/slave(1)" }] 
(mesosphere.mesos.TaskBuilder:marathon-akka.actor.default-dispatcher-19)

can anyone help me with this?

thank you.


GaoJin CAO 
ChinaMobile(Suzhou) R&D
Phone：18896723732 
Mail：caogaojin at cmss.chinamobile.com