Publish release notes for latest cs Docker engine
Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
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Sven Dowideit
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@ -16,79 +16,140 @@ page_keywords: docker, documentation, about, technology, understanding, enterpri
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- First release
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## Commercialy Supported Docker Engine
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## Commercially Supported Docker Engine
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### CS Docker Engine 1.6.2-cs5
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(21 May 2015)
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For customers running Docker Engine on [supported versions of RedHat Enterprise
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Linux](https://www.docker.com/enterprise/support/) with [SELinux
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enabled](https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/
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6/html/Security-Enhanced_Linux/sect-Security-Enhanced_Linux-Working_with_SELinux
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-Enabling_and_Disabling_SELinux.html), the `docker build` and `docker run`
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commands will fail because bind mounted volumes or files are not accessible. As
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a result, customers with SELinux enabled cannot use these commands in their
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environment. By installing Docker Engine 1.6.2-cs5, customers can run with
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SELinux enabled and run these commands on their supported operating system.
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commands will not have DNS host name resolution and bind-mounted volumes may
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not be accessible.
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As a result, customers with SELinux will be unable to use hostname-based network
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access in either `docker build` or `docker run`, nor will they be able to
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`docker run` containers
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that use `--volume` or `-v` bind-mounts (with an incorrect SELinux label) in
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their environment. By installing Docker
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Engine 1.6.2-cs5, customers can use Docker as intended on RHEL with SELinux enabled.
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**Affected Versions**: Docker Engine: 1.6.x-cs1 through 1.6.x-cs4
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For example, you see will failures like:
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It is **highly recommended** that all customers running Docker Engine 1.6.x-cs1
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through 1.6.x-cs4 update to this release.
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```
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[root@dhe ~]# docker -v
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Docker version 1.6.0-cs2, build b8dd430
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[root@dhe ~]# ping dhe.home.org.au
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PING dhe.home.org.au (10.10.10.104) 56(84) bytes of data.
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64 bytes from dhe.home.gateway (10.10.10.104): icmp_seq=1 ttl=64 time=0.663 ms
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^C
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--- dhe.home.org.au ping statistics ---
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2 packets transmitted, 2 received, 0% packet loss, time 1001ms
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rtt min/avg/max/mdev = 0.078/0.370/0.663/0.293 ms
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[root@dhe ~]# docker run --rm -it debian ping dhe.home.org.au
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ping: unknown host
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[root@dhe ~]# docker run --rm -it debian cat /etc/resolv.conf
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cat: /etc/resolv.conf: Permission denied
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[root@dhe ~]# docker run --rm -it debian apt-get update
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Err http://httpredir.debian.org jessie InRelease
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#### How to workaround this issue
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Err http://security.debian.org jessie/updates InRelease
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Customers who do not install this update have two options. The
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first option, is to disable SELinux. This is *not recommended* for production
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systems where SELinux is required.
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Err http://httpredir.debian.org jessie-updates InRelease
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Err http://security.debian.org jessie/updates Release.gpg
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Could not resolve 'security.debian.org'
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Err http://httpredir.debian.org jessie Release.gpg
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Could not resolve 'httpredir.debian.org'
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Err http://httpredir.debian.org jessie-updates Release.gpg
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Could not resolve 'httpredir.debian.org'
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[output truncated]
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```
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or when running a `docker build`:
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```
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[root@dhe ~]# docker build .
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Sending build context to Docker daemon 11.26 kB
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Sending build context to Docker daemon
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Step 0 : FROM fedora
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---> e26efd418c48
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Step 1 : RUN yum install httpd
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---> Running in cf274900ea35
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One of the configured repositories failed (Fedora 21 - x86_64),
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and yum doesn't have enough cached data to continue. At this point the only
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safe thing yum can do is fail. There are a few ways to work "fix" this:
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[output truncated]
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```
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**Affected Versions**: All previous versions of Docker Engine when SELinux
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is enabled.
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Docker **highly recommends** that all customers running previous versions of
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Docker Engine update to this release.
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#### **How to workaround this issue**
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Customers who choose not to install this update have two options. The
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first option is to disable SELinux. This is *not recommended* for production
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systems where SELinux is typically required.
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The second option is to pass the following parameter in to `docker run`.
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The second option is to pass the following parameter in to `docker run`.
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--security-opt=label:type:docker_t
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This parameter cannot be passed to the `docker build` command.
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#### Upgrade notes
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#### **Upgrade notes**
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When upgrading, make sure you stop DHE first, perform the Engine upgrade, and
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then restart DHE.
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If you are running with SELinux enabled, previous Docker Engine releases allowed
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you to bind mount additional volumes or files inside the container as follows:
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you to bind-mount additional volumes or files inside the container as follows:
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$ docker run -it -v /home/user/foo.txt:/foobar.txt:ro
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$ docker run -it -v /home/user/foo.txt:/foobar.txt:ro <imagename>
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In the 1.6.2-cs5 release, you must ensure additional bind mounts have the correct
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SELinux context. As an example, if you want to mount `foobar.txt` as read only
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into the container, do the following to create and test your bind mount:
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In the 1.6.2-cs5 release, you must ensure additional bind-mounts have the correct
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SELinux context. For example, if you want to mount `foobar.txt` as read-only
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into the container, do the following to create and test your bind-mount:
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1. Add the `z` option to the bind mount when you specify `docker run`.
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$ docker run -it -v /home/user/foo.txt:/foobar.txt:ro,z
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$ docker run -it -v /home/user/foo.txt:/foobar.txt:ro,z <imagename>
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2. Exec into your new container.
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2. Exec into your new container.
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For example, if your container is `bashful_curie` open a shell on the
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For example, if your container is `bashful_curie`, open a shell on the
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container:
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$ docker exec -it bashful_curie bash
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3. Use the `cat` command to check the permissions on the mounted file.
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3. Use `cat` to check the permissions on the mounted file.
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$ cat /foobar.txt
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the contents of foobar appear
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If you see the file's contents, your mount succeeded. If you receive a
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`Permission denied` message and/or the `/var/log/audit/audit.log` file on your
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Docker host contains an AVC Denial message, the mount did not succeed.
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`Permission denied` message and/or the `/var/log/audit/audit.log` file on
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your Docker host contains an AVC Denial message, the mount did not succeed.
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type=AVC msg=audit(1432145409.197:7570): avc: denied { read } for pid=21167 comm="cat" name="foobar.txt" dev="xvda2" ino=17704136 scontext=system_u:system_r:svirt_lxc_net_t:s0:c909,c965 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file
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Recheck your command line to make sure you passed in the `z` option.
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### CS Docker Engine 1.6.2
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### CS Docker Engine 1.6.2-cs4
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(13 May 2015)
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Fix mount regression for `/sys`.
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### CS Docker Engine 1.6.1
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### CS Docker Engine 1.6.1-cs3
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(11 May 2015)
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Docker Engine version 1.6.1 has been released to address several vulnerabilities
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@ -172,7 +233,7 @@ proactively tighten the policy further by outright denying the use of the
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Because this addition is preventative, no CVE-ID is requested.
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### CS Docker Engine 1.6.0
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### CS Docker Engine 1.6.0-cs2
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(23 Apr 2015)
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- First release, please see the [Docker Engine 1.6.0 Release notes](/release-notes/)
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