Add support for atomic host

Updates based on feedback

Simplify checks for file exists

remove invalid char

Review feedback. Use regular systemd file.

Add template for docker systemd atomic

Vagrantfile

@@ -23,6 +23,7 @@ $etcd_instances = $num_instances
 $kube_master_instances = $num_instances == 1 ? $num_instances : ($num_instances - 1)
 # All nodes are kube nodes
 $kube_node_instances = $num_instances
+$local_release_dir = "/vagrant/temp"
 
 host_vars = {}
 
@@ -97,7 +98,7 @@ Vagrant.configure("2") do |config|
         "ip": ip,
         "flannel_interface": ip,
         "flannel_backend_type": "host-gw",
-        "local_release_dir": "/vagrant/temp",
+        "local_release_dir" => $local_release_dir,
         "download_run_once": "False",
         # Override the default 'calico' with flannel.
         # inventory/group_vars/k8s-cluster.yml

docs/atomic.md

@@ -0,0 +1,22 @@
+Atomic host bootstrap
+=====================
+
+Atomic host testing has been done with the network plugin flannel. Change the inventory var `kube_network_plugin: flannel`.
+
+Note: Flannel is the only plugin that has currently been tested with atomic
+
+### Vagrant
+
+* For bootstrapping with Vagrant, use box centos/atomic-host 
+* Update VagrantFile variable `local_release_dir` to `/var/vagrant/temp`.
+* Update `vm_memory = 2048` and `vm_cpus = 2`
+* Networking on vagrant hosts has to be brought up manually once they are booted.
+
+    ```
+    vagrant ssh
+    sudo /sbin/ifup enp0s8
+    ```
+
+* For users of vagrant-libvirt download qcow2 format from https://wiki.centos.org/SpecialInterestGroup/Atomic/Download/
+
+Then you can proceed to [cluster deployment](#run-deployment)

docs/vars.md

@@ -102,4 +102,3 @@ Stack](https://github.com/kubernetes-incubator/kargo/blob/master/docs/dns-stack.
 
 Kargo sets up two Kubernetes accounts by default: ``root`` and ``kube``. Their
 passwords default to changeme. You can set this by changing ``kube_api_pwd``.
-

roles/bootstrap-os/tasks/main.yml

@@ -9,3 +9,11 @@
   when: bootstrap_os == "centos"
 
 - include: setup-pipelining.yml
+
+- name: check if atomic host
+  stat:
+    path: /run/ostree-booted
+  register: ostree
+
+- set_fact:
+    is_atomic: "{{ ostree.stat.exists }}"

roles/docker/tasks/main.yml

@@ -38,7 +38,7 @@
   retries: 4
   delay: "{{ retry_stagger | random + 3 }}"
   with_items: "{{ docker_repo_key_info.repo_keys }}"
-  when: not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"]
+  when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic)
 
 - name: ensure docker repository is enabled
   action: "{{ docker_repo_info.pkg_repo }}"
@@ -46,13 +46,13 @@
     repo: "{{item}}"
     state: present
   with_items: "{{ docker_repo_info.repos }}"
-  when: (not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"]) and (docker_repo_info.repos|length > 0)
+  when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic) and (docker_repo_info.repos|length > 0)
 
 - name: Configure docker repository on RedHat/CentOS
   template:
     src: "rh_docker.repo.j2"
     dest: "/etc/yum.repos.d/docker.repo"
-  when: ansible_distribution in ["CentOS","RedHat"]
+  when: ansible_distribution in ["CentOS","RedHat"] and not is_atomic
 
 - name: ensure docker packages are installed
   action: "{{ docker_package_info.pkg_mgr }}"
@@ -66,7 +66,7 @@
   delay: "{{ retry_stagger | random + 3 }}"
   with_items: "{{ docker_package_info.pkgs }}"
   notify: restart docker
-  when: (not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"]) and (docker_package_info.pkgs|length > 0)
+  when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic) and (docker_package_info.pkgs|length > 0)
 
 - name: check minimum docker version for docker_dns mode. You need at least docker version >= 1.12 for resolvconf_mode=docker_dns
   command: "docker version -f '{{ '{{' }}.Client.Version{{ '}}' }}'"

roles/docker/tasks/systemd.yml

@@ -15,7 +15,14 @@
     src: docker.service.j2
     dest: /etc/systemd/system/docker.service
   register: docker_service_file
-  when: not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"]
+  when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic)
+
+- name: Write docker.service systemd file for atomic
+  template:
+    src: docker_atomic.service.j2
+    dest: /etc/systemd/system/docker.service
+  notify: restart docker
+  when: is_atomic
 
 - name: Write docker options systemd drop-in
   template:

roles/docker/templates/docker_atomic.service.j2

@@ -0,0 +1,38 @@
+[Unit]
+Description=Docker Application Container Engine
+Documentation=http://docs.docker.com
+After=network.target
+Wants=docker-storage-setup.service
+
+[Service]
+Type=notify
+NotifyAccess=all
+EnvironmentFile=-/etc/sysconfig/docker
+EnvironmentFile=-/etc/sysconfig/docker-storage
+EnvironmentFile=-/etc/sysconfig/docker-network
+Environment=GOTRACEBACK=crash
+Environment=DOCKER_HTTP_HOST_COMPAT=1
+Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin
+ExecReload=/bin/kill -s HUP $MAINPID
+Delegate=yes
+KillMode=process
+ExecStart=/usr/bin/dockerd-current \
+          --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current \
+          --default-runtime=docker-runc \
+          --exec-opt native.cgroupdriver=systemd \
+          --userland-proxy-path=/usr/libexec/docker/docker-proxy-current \
+          $DOCKER_OPTS \
+          $DOCKER_STORAGE_OPTIONS \
+          $DOCKER_NETWORK_OPTIONS \
+          $DOCKER_DNS_OPTIONS \
+          $ADD_REGISTRY \
+          $BLOCK_REGISTRY \
+          $INSECURE_REGISTRY
+LimitNOFILE=1048576
+LimitNPROC=1048576
+LimitCORE=infinity
+TimeoutStartSec=1min
+Restart=on-abnormal
+
+[Install]
+WantedBy=multi-user.target

roles/etcd/meta/main.yml

@@ -2,7 +2,7 @@
 dependencies:
   - role: adduser
     user: "{{ addusers.etcd }}"
-    when: not ansible_os_family in ['CoreOS', 'Container Linux by CoreOS']
+    when: not (ansible_os_family in ['CoreOS', 'Container Linux by CoreOS'] or is_atomic)
   - role: download
     file: "{{ downloads.etcd }}"
     tags: download

roles/kernel-upgrade/tasks/main.yml

@@ -2,4 +2,4 @@
 
 - include: centos-7.yml
   when: ansible_distribution in ["CentOS","RedHat"] and
-        ansible_distribution_major_version >= 7
+        ansible_distribution_major_version >= 7 and not is_atomic

roles/kubernetes/node/templates/manifests/kube-proxy.manifest.j2

@@ -50,7 +50,11 @@ spec:
   volumes:
   - name: ssl-certs-host
     hostPath:
+{% if ansible_os_family == 'RedHat' %}
+      path: /etc/pki/tls
+{% else %}
       path: /usr/share/ca-certificates
+{% endif %}
   - name: "kubeconfig"
     hostPath:
       path: "{{kube_config_dir}}/node-kubeconfig.yaml"

roles/kubernetes/preinstall/meta/main.yml

@@ -3,3 +3,4 @@ dependencies:
   - role: adduser
     user: "{{ addusers.kube }}"
     tags: kubelet
+    when: not is_atomic

roles/kubernetes/preinstall/tasks/main.yml

@@ -91,7 +91,7 @@
   yum:
     update_cache: yes
     name: '*'
-  when: ansible_pkg_mgr == 'yum'
+  when: ansible_pkg_mgr == 'yum' and not is_atomic
   tags: bootstrap-os
 
 - name: Install latest version of python-apt for Debian distribs
@@ -112,7 +112,7 @@
 
 - name: Install epel-release on RedHat/CentOS
   shell: rpm -qa | grep epel-release || rpm -ivh {{ epel_rpm_download_url }}
-  when: ansible_distribution in ["CentOS","RedHat"]
+  when: ansible_distribution in ["CentOS","RedHat"] and not is_atomic
   changed_when: False
   check_mode: no
   tags: bootstrap-os
@@ -127,7 +127,7 @@
   retries: 4
   delay: "{{ retry_stagger | random + 3 }}"
   with_items: "{{required_pkgs | default([]) | union(common_required_pkgs|default([]))}}"
-  when: not ansible_os_family in ["CoreOS", "Container Linux by CoreOS"]
+  when: not (ansible_os_family in ["CoreOS", "Container Linux by CoreOS"] or is_atomic)
   tags: bootstrap-os
 
 # Todo : selinux configuration

roles/kubernetes/preinstall/tasks/set_facts.yml

@@ -83,5 +83,17 @@
 - set_fact:
     peer_with_calico_rr: "{{ 'calico-rr' in groups and groups['calico-rr']|length > 0 }}"
 
+- name: check if atomic host
+  stat:
+    path: /run/ostree-booted
+  register: ostree
+
+- set_fact:
+    is_atomic: "{{ ostree.stat.exists }}"
+
+- set_fact:
+    kube_cert_group: "kube"
+  when: is_atomic
+
 - include: set_resolv_facts.yml
   tags: [bootstrap-os, resolvconf, facts]