Keyboard shortcuts

Press ← or → to navigate between chapters

Press S or / to search in the book

Press ? to show this help

Press Esc to hide this help

Project Atomic

Fedora Atomic

CentOS Atomic

Kubernetes on Atomic

Deploy kubernetes on CentOS and CentOS Atomic hosts using Ansible

Atomic Reactor

On Fedora 24 or CentOS 7

$ dnf install -y atomic-reactor
$ docker pull registry.gitlab.com/gbraad/fedora:atomicreactor
$ docker tag registry.gitlab.com/gbraad/fedora:atomicreactor buildroot-hostdocker
$ atomic-reactor build git --method hostdocker \
             --build-image buildroot-hostdocker \
             --image hello-world \
             --target-registries 10.5.0.2:5000 \
             --uri "https://github.com/TomasTomecek/docker-hello-world.git"

More info

Note: currently FROM:scratch builds are not supported.

Build your own Atomic

Creating a custom image

You can add repos simply by including them in the same folder as your myostree.json definition.

In the json file you define:

{
    "include": "centos-atomic-host.json",
    "ref": "centos-atomic-host/7/x86_64/my-software",
    "automatic_version_prefix": "2016.0",
    "repos": ["myrepo"],
    "packages": [
        "my-sofware"
     ]
}

and create a file myrepo.repo containing:

[myrepo]
name=My software repo
baseurl=http://gbraad.gitlab.io/mysoftware
gpgcheck=0

Variant: CentOS

Automated GitLab CI runner is available: BYO Atomic - CentOS

Instructions

Use Fedora as basis for the buildserver. In this example F24-Cloud is used.

dnf install -y git rpm-ostree rpm-ostree-toolbox python

git clone https://github.com/CentOS/sig-atomic-buildscripts
cd sig-atomic-buildscripts
git checkout downstream

mkdir -p /srv/repo
ostree --repo=/srv/repo init --mode=archive-z2

rpm-ostree compose tree --repo=/srv/repo sig-atomic-buildscripts/centos-atomic-host.json

cd /srv/repo
python -m SimpleHTTPServer

sudo ostree remote add foo http://$YOUR_IP:8000/repo --no-gpg-verify
sudo rpm-ostree rebase foo:centos-atomic/7/x86_64/docker-host

Variant: Fedora

Automated GitLab CI runner is available: BYO Atomic - Fedora

Instructions

git clone https://git.fedorahosted.org/git/fedora-atomic.git
cd fedora-atomic
git checkout f23

Upstream ostree

Using CentOS continuous ostree

If you are running an existing Atomic image

ostree remote add --set=gpg-verify=false centos-atomic-continuous https://ci.centos.org/artifacts/sig-atomic/rdgo/centos-continuous/ostree/repo/
rpm-ostree rebase centos-atomic-continuous:centos-atomic-host/7/x86_64/devel/continuous
systemctl reboot

Source

Using Fedora Workstation ostree

From inside an existing system:

yum -y install ostree
ostree admin init-fs /
ostree remote add --set=gpg-verify=false fedora-ws-centosci https://ci.centos.org/artifacts/sig-atomic/rdgo/fedora-workstation/ostree/repo/
ostree --repo=/ostree/repo pull fedora-ws-centosci:fedora/24/x86_64/desktop/continuous
ostree admin os-init fedora
ostree admin deploy --os=fedora --karg-proc-cmdline --karg=enforcing=0 fedora-ws-centosci:fedora/24/x86_64/desktop/continuous
cp /etc/fstab /ostree/deploy/fedora/deploy/$checksum.0/etc
#  (You may need to modify the fstab)
grub2-mkconfig -o /boot/grub2/grub.cfg

If you already deployed F23 and want to rebase to F24:

  rpm-ostree rebase fedora/24/x86_64/desktop_continuous

Source, See also

PXE boot Atomic image

Steven Dake describes the process of converting an Atomic image to be used by Ironic for PXE-boot.

Grow the / filesystem

lvremove /dev/mapper/atomicos-docker--pool
lvresize -l +100%FREE /dev/atomicos/root
xfs_growfs /dev/atomicos/root

Note: this trashes the docker storage pool

Atomic on OpenStack

$ wget http://http://cloud.centos.org/centos/7/atomic/images/CentOS-Atomic-Host-7-GenericCloud.qcow2
$ openstack image create "CentOS7 Atomic" --progress --file CentOS-Atomic-Host-7-GenericCloud.qcow2 --disk-format qcow2 --container-format bare --property os_distro=centos

$ wget https://download.fedoraproject.org/pub/alt/atomic/stable/CloudImages/x86_64/images/Fedora-Atomic-24-20160809.0.x86_64.qcow2
$ openstack image create "Fedora24 Atomic" --progress --file Fedora-Atomic-24-20160809.0.x86_64.qcow2 --disk-format qcow2 --container-format bare --property os_distro=fedora

Note: for Ceph you might have to convert-img to RAW format.

Atomic using Vagrant

CentOS

$ vagrant init centos/atomic-host && vagrant up --provider virtualbox 
# or  --provider libvirt

Source

Fedora

$ vagrant init fedora/24-atomic-host && vagrant up --provider virtualbox
# or  --provider libvirt

Source

Using OpenStack DiskImage Builder (Magnum)

Create the ostree

git clone https://pagure.io/fedora-atomic.git -b f24
ostree init --repo=/srv/repo --mode=archive-z2
rpm-ostree compose tree --repo=/srv/repo ~/fedora-atomic/fedora-atomic-docker-host.json

ostree trivial-httpd -d -P 9001 /srv/repo

Create the image

git clone https://git.openstack.org/openstack/magnum
git clone https://git.openstack.org/openstack/diskimage-builder.git
git clone https://git.openstack.org/openstack/dib-utils.git

export PATH="${PWD}/dib-utils/bin:$PATH"
export PATH="${PWD}/diskimage-builder/bin:$PATH"

export ELEMENTS_PATH="${PWD}/diskimage-builder/elements"
export ELEMENTS_PATH="${ELEMENTS_PATH}:${PWD}/magnum/magnum/drivers/common/image"

export DIB_RELEASE=24
export DIB_DEBUG_TRACE=1
export DIB_IMAGE_SIZE=3.0

export FEDORA_ATOMIC_TREE_URL=http://localhost:9001
export FEDORA_ATOMIC_TREE_REF=$(cat /srv/f24ah/refs/heads/fedora-atomic/24/x86_64/docker-host)

mkdir -p ~/output

disk-image-create fedora-atomic -o ~/output/fedora-atomic

Ref

Other resources