# Problem with Docker image size

**URL:** <https://forums.docker.com/t/problem-with-docker-image-size/30517>\
**Category:** General\
**Created:** [March 31, 2017, 12:10pm UTC](https://forums.docker.com/t/problem-with-docker-image-size/30517 "2017-03-31T12:10:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![thug0151](https://avatars.discourse-cdn.com/v4/letter/t/8dc957/32.png) [@thug0151](https://forums.docker.com/u/thug0151)\
**Post date:** [March 31, 2017, 12:10pm UTC](https://forums.docker.com/t/problem-with-docker-image-size/30517/1 "2017-03-31T12:10:31Z")

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Hi,  
So according to all guides to keep docker image sizes small you should keep your RUN statements to a minimum.  
I tried with two different ways writing my Dockerfile

```
ubuntu@ip-172-31-31-165:~/iox/xxx$ cat Dockerfile 
FROM devhub-docker.cisco.com/iox-docker/base-x86_64:latest

RUN opkg update 
RUN opkg install iox-toolchain packagegroup-cisco-core-python python-dev python-pip git cmake
RUN python -m pip install -U pip
RUN pip install -U pip setuptools
RUN pip install 'requests[security]'
RUN pip install freeopcua
RUN pip install lxml

RUN mkdir /usr/bin/xxx
COPY Source /usr/bin/xxx
RUN chmod -R 777 /usr/bin/xxx/

CMD /opt/app/loop.sh

```

and

```
FROM devhub-docker.cisco.com/iox-docker/base-x86_64:latest

RUN opkg update && opkg install iox-toolchain packagegroup-cisco-core-python python-dev python-pip git cmake && \
  python -m pip install -U pip && \
  pip install -U pip setuptools && \
  pip install 'requests[security]' && \
  pip install freeopcua && \
  pip install lxml

RUN mkdir /usr/bin/xxx
COPY Source /usr/bin/xxx
RUN chmod -R 777 /usr/bin/xxx/
CMD /opt/app/loop.sh

```

Both images end up with the same size:

```
ubuntu@ip-172-31-31-165:~/iox/xxx$ sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
2xxx-python 2.0 15cf9e504ed9 27 seconds ago 342 MB
2xxx-python 1.0 fd77fb82e011 22 minutes ago 342 MB

```

Is this expected behavior?

Thanks  
Oscar Bengtson

---

<div class="post-metadata">

**Author:** ![think](https://sea3.discourse-cdn.com/docker/user_avatar/forums.docker.com/think/32/14641_2.png) [@think](https://forums.docker.com/u/think)\
**Post date:** [March 31, 2017, 1:34pm UTC](https://forums.docker.com/t/problem-with-docker-image-size/30517/2 "2017-03-31T13:34:36Z")

</div>

yes.  
but you could delete `git`, `cmake`,`python-pip` and ‘python-dev’ after using them. (i’m assuming, that your app does not rely on them)  
Then you could free some MB.

There is also a `--squash` option for `docker build` with the latest docker. This will squash your layers into a single one.