Zun in Kolla ============ "Zun is an OpenStack Container service. It aims to provide an OpenStack API for provisioning and managing containerized workload on OpenStack." [1]. Preparation and Deployment -------------------------- Zun requires kuryr and etcd services, for more information about how to configure kuryr refer to `Kuryr Guide `_. To allow Zun Compute connect to the Docker Daemon, add the following in the ``docker.service`` file on each zun-compute node. :: ExecStart= -H tcp://:2375 -H unix:///var/run/docker.sock --cluster-store=etcd://:2379 --cluster-advertise=:2375 .. note:: ``DOCKER_SERVICE_IP`` is zun-compute host IP address. ``2375`` is port that allows Docker daemon to be accessed remotely. By default zun is disabled in the ``group_vars/all.yml``. In order to enable it, you need to edit the file globals.yml and set the following variables: :: enable_zun: "yes" enable_kuryr: "yes" enable_etcd: "yes" Deploy the OpenStack cloud and zun. :: $ kolla-ansible deploy Verify ------ Generate the credentials file. :: $ kolla-ansible post-deploy Source credentials file. :: $ . /etc/kolla/admin-openrc.sh Download and create a glance container image. :: $ docker pull cirros $ docker save cirros | openstack image create cirros --public \ --container-format docker --disk-format raw Create zun container. :: $ zun create --name test --net network=demo-net cirros ping -c4 8.8.8.8 .. note:: Kuryr does not support networks with DHCP enabled, disable DHCP in the subnet used for zun containers. :: openstack subnet set --no-dhcp Verify container is created. :: $ zun list +--------------------------------------+------+---------------+---------+------------+------------+-------+ | uuid | name | image | status | task_state | addresses | ports | +--------------------------------------+------+---------------+---------+------------+------------+-------+ | 3719a73e-5f86-47e1-bc5f-f4074fc749f2 | test | cirros | Created | None | 172.17.0.3 | [] | +--------------------------------------+------+---------------+---------+------------+------------+-------+ Start container. :: $ zun start test Request to start container test has been accepted. Verify container. :: $ zun logs test PING 8.8.8.8 (8.8.8.8): 56 data bytes 64 bytes from 8.8.8.8: seq=0 ttl=45 time=96.396 ms 64 bytes from 8.8.8.8: seq=1 ttl=45 time=96.504 ms 64 bytes from 8.8.8.8: seq=2 ttl=45 time=96.721 ms 64 bytes from 8.8.8.8: seq=3 ttl=45 time=95.884 ms --- 8.8.8.8 ping statistics --- 4 packets transmitted, 4 packets received, 0% packet loss round-trip min/avg/max = 95.884/96.376/96.721 ms [1] https://github.com/openstack/zun