# Release 3.0.21

[jcvenegas]

Welcome to Clear Containers release 3.0.21.

For this release the virtcontainers package was updated to bring support for SCSI. Now it is possible to choose the hypervisor storage driver through Clear Containers configuration file.

Clear Containers Kernel now is updated to latest LTS version. This kernel is required as part of the new SCSI and CPU hot-plug support, the previous version was not working correctly.

Changes

• vendor: Update virtcontainers vendoring
• Add configuration for hypervisor block storage driver

Shortlog

5e27776 vendor: Update virtcontainers vendoring
dc15173 cc-env: Include hypervisor block storage driver in cc-env output
1768dd5 config: Add configuration option for hypervisor block storage driver
accaa9d vendor: Vendor virtcontainers for SCSI support

Compatibility with Docker

Clear Containers 3.0.21 is compatible with Docker v17.12-ce

OCI Runtime Specification

Clear Containers 3.0.21 support the OCI Runtime Specification v1.0.0-rc5

Clear Linux Containers image

Clear Containers 3.0.21 requires at least Clear Linux containers image 20640 and agent version 6f6e9e.

Clear Linux Containers Kernel

Clear Containers 3.0.21 requires at least Clear Linux Containers kernel v4.14.22-86.container

Installation

• BC-Linux

• Centos

• Clear Linux

• Fedora

• SLES

• Ubuntu

• Developers

Issues & limitations

Docker swarm support

See issue #771 for more

Networking

Adding networks dynamically

Resource management

docker run --cpus=

See issue #341 for more information.

docker run --kernel-memory=

See issue #388 for more information.

shm

cgroup constraints

Capabilities

See issue #51 for more information.

sysctl

tmpfs

Other

checkpoint and restore

docker stats

See issue #200 for more information.

runtime commands

ps command

See issue #95 for more information.

events command

See issue #379 for more information.

update command

See issue #380 for more information.

Networking

Support for joining an existing VM network

docker --net=host

docker run --link

Host resource sharing

docker --device

docker -v /dev/...

docker run --privileged

Other

Annotations

runtime commands

init command

spec command

Host rdmsr warnings

More information Limitations

[jodh-intel]

Can we explain why kernel https://github.com/clearcontainers/linux/releases/tag/v4.14.22-86.container is required?

[jcvenegas]

@jodh-intel added a paragraph in the release notes about the kernel why is need new kernel.

[jcvenegas]

Restating ubuntu 16.04 job

16:16:10 # cd .; git clone https://github.com/kubernetes-incubator/cri-o /home/jenkins/jenkins_slave/workspace/clear-containers-runtime-azure-ubuntu-16-04-PR/go/src/github.com/kubernetes-incubator/cri-o
16:16:10 Cloning into '/home/jenkins/jenkins_slave/workspace/clear-containers-runtime-azure-ubuntu-16-04-PR/go/src/github.com/kubernetes-incubator/cri-o'...
16:16:10 error: index-pack died of signal 15
16:16:10 fatal: index-pack failed
16:16:10 package github.com/kubernetes-incubator/cri-o: exit status 128
16:16:10 .ci/install_crio.sh: line 26: pushd: /home/jenkins/jenkins_slave/workspace/clear-containers-runtime-azure-ubuntu-16-04-PR/go/src/github.com/kubernetes-incubator/cri-o: No such file or directory

[jcvenegas]

@grahamwhaley @chavafg seems that manage-ctr_mrg.sh hanged in metrics server

 + /srv/jenkins/workspace/workspace/clear-containers-runtime-16.04-PR/go/src/github.com/clearcontainers/tests/cmd/container-manager/manage_ctr_mgr.sh docker configure -r runc -f

[grahamwhaley]

yep, is under discussion on clearcontainers/tests#942 and thereabouts.
Something is upsetting the docker on the server - we need to work out what exactly, probably by reproducing locally...
for now, just ignore the (non-blocking) metrics ci fails I'm afraid.

[sboeuf]

LGTM

[mcastelino]

@jcvenegas small typo
storage driver trough Clear

[mcastelino]

LGTM