Thanks for you suggestion but I just get this when use you way
```
- name: upgrade docker-engine
apt:
name: docker-engine
only_upgrade: docker-engine
# state: latest
```
```
TASK [upgrade docker-engine]
***************************************************
ok: [xx.xx.xx.xx]
```
and if I add state:latest, I just think only_upgrade is not work , because
I also can install the latest version without only_upgrade
在 2016年7月21日星期四 UTC+8下午10:44:46，Kai Stian Olstad写道：
>
> On 21. juli 2016 03:44, [email protected] <javascript:> wrote:
> > xx.xxx.xx.xxx | FAILED! => {
> > "changed": false,
> > "failed": true,
> > "msg": "Boolean docker-engine not in either boolean list"
> > }
> > ```
> >
> > In the document
> >
> > only_upgrade(added in 2.1)
> > Only install/upgrade a package if it is already installed.
>
> The documentation also say the default value is false, so this option
> can only be true or false.
>
>
> > - name: upgrade docker-engine
> > apt:
> > only_upgrade: docker-engine
>
> This should be
> - name: upgrade docker-engine
> apt:
> name: docker-engine
> only_upgrade: true
>
> I also think you need to add state: latest to have it upgrade the package.
>
> --
> Kai Stian Olstad
>
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