Add multipathing support to docker container

Due some cinder drivers need multipathing support like this one
http://docs.openstack.org/mitaka/config-reference/block-storage/drivers/ibm-storwize-svc-driver.html

This PS will allow to run these additional drivers when using Kolla.

Implements: blueprint multipath-support
Change-Id: Id6cf29f984c92773bbfc2f95daea573a74701648

ansible/group_vars/all.yml

@@ -205,6 +205,7 @@ enable_magnum: "no"
 enable_manila: "no"
 enable_mistral: "no"
 enable_mongodb: "no"
+enable_multipathd: "no"
 enable_murano: "no"
 enable_neutron_lbaas: "no"
 enable_neutron_qos: "no"

ansible/inventory/all-in-one

@@ -244,3 +244,7 @@ ceilometer
 
 [ceilometer-compute:children]
 compute
+
+# Multipathd
+[multipathd:children]
+compute

ansible/inventory/multinode

@@ -256,3 +256,7 @@ ceilometer
 
 [ceilometer-compute:children]
 compute
+
+# Multipathd
+[multipathd:children]
+compute

ansible/roles/multipathd/defaults/main.yml

@@ -0,0 +1,9 @@
+---
+project_name: "multipathd"
+
+####################
+# Docker
+####################
+multipathd_image: "{{ docker_registry ~ '/' if docker_registry else '' }}{{ docker_namespace }}/{{ kolla_base_distro }}-{{ kolla_install_type }}-multipathd"
+multipathd_tag: "{{ openstack_release }}"
+multipathd_image_full: "{{ multipathd_image }}:{{ multipathd_tag }}"

ansible/roles/multipathd/tasks/config.yml

@@ -0,0 +1,24 @@
+---
+- name: Ensuring config directories exist
+  file:
+    path: "{{ node_config_directory }}/{{ item }}"
+    state: "directory"
+    recurse: yes
+  when: inventory_hostname in groups['compute']
+  with_items:
+    - "multipathd"
+
+- name: Copying over config.json files for services
+  template:
+    src: "{{ item }}.json.j2"
+    dest: "{{ node_config_directory }}/{{ item }}/config.json"
+  when: inventory_hostname in groups['compute']
+  with_items:
+    - "multipathd"
+
+- name: Copying over multipath.conf
+  template:
+    src: "{{ role_path }}/templates/multipath.conf.j2"
+    dest: "{{ node_config_directory }}/{{ item }}/multipath.conf"
+  with_items:
+    - "multipathd"

ansible/roles/multipathd/tasks/deploy.yml

@@ -0,0 +1,4 @@
+---
+- include: config.yml
+
+- include: start.yml

ansible/roles/multipathd/tasks/main.yml

@@ -0,0 +1,2 @@
+---
+- include: "{{ action }}.yml"

ansible/roles/multipathd/tasks/pull.yml

@@ -0,0 +1,7 @@
+---
+- name: Pulling multipathd image
+  kolla_docker:
+    action: "pull_image"
+    common_options: "{{ docker_common_options }}"
+    image: "{{ multipathd_image_full }}"
+  when: inventory_hostname in groups['multipathd']

ansible/roles/multipathd/tasks/reconfigure.yml

@@ -0,0 +1 @@
+---

ansible/roles/multipathd/tasks/start.yml

@@ -0,0 +1,21 @@
+---
+- name: Starting multipathd container
+  kolla_docker:
+    action: "start_container"
+    common_options: "{{ docker_common_options }}"
+    image: "{{ multipathd_image_full }}"
+    name: "multipathd"
+    ipc_mode: "host"
+    privileged: True
+    volumes:
+      - "{{ node_config_directory }}/multipathd/:{{ container_config_directory }}/:ro"
+      - "kolla_logs:/var/log/kolla/"
+      - "/etc/localtime:/etc/localtime:ro"
+      - "/dev/:/dev/"
+      - "/run/:/run/"
+      - "/sys/fs/cgroup:/sys/fs/cgroup:ro"
+      - "/lib/modules:/lib/modules:ro"
+      - "/sys/kernel/config:/configfs"
+      - "cinder:/var/lib/cinder"
+      - "iscsi_info:/etc/iscsi"
+  when: inventory_hostname in groups['compute']

ansible/roles/multipathd/tasks/upgrade.yml

@@ -0,0 +1,5 @@
+---
+- include: config.yml
+
+- include: start.yml
+  serial: "30%"

ansible/roles/multipathd/templates/multipath.conf.j2

@@ -0,0 +1,11 @@
+defaults {
+   user_friendly_names no
+   polling_interval  30
+}
+
+blacklist {
+    devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*"
+    devnode "^sd[a]"
+    devnode "^hd[a-z]"
+    devnode "^cciss!c[0-9]d[0-9]*"
+}

ansible/roles/multipathd/templates/multipathd.json.j2

@@ -0,0 +1,11 @@
+{
+    "command": "/sbin/multipathd -d",
+    "config_files": [
+        {
+            "source": "{{ container_config_directory }}/multipath.conf",
+            "dest": "/etc/multipath.conf",
+            "owner": "root",
+            "perm": "0600"
+        }
+    ]
+}

ansible/site.yml

@@ -22,6 +22,7 @@
     - mariadb
     - iscsid
     - tgtd
+    - multipathd
     - murano-api
     - neutron-server
     - nova-api
@@ -60,6 +61,13 @@
         tags: iscsi,
         when: enable_iscsi | bool }
 
+- hosts:
+    - multipathd
+  roles:
+    - { role: multipathd,
+        tags: multipathd,
+        when: enable_multipathd | bool }
+
 - hosts: rabbitmq
   roles:
     - { role: rabbitmq,

docker/multipathd/Dockerfile.j2

@@ -0,0 +1,18 @@
+FROM {{ namespace }}/{{ image_prefix }}base:{{ tag }}
+MAINTAINER {{ maintainer }}
+
+{% if base_distro in ['centos', 'fedora', 'oraclelinux', 'rhel'] %}
+
+RUN yum -y install \
+        device-mapper-multipath \
+    && yum clean all
+
+{% elif base_distro in ['ubuntu', 'debian'] %}
+
+RUN apt-get -y install --no-install-recommends \
+        multipath-tools \
+    && apt-get clean
+
+{% endif %}
+
+{{ include_footer }}

etc/kolla/globals.yml

@@ -120,6 +120,7 @@ neutron_external_interface: "eth1"
 #enable_mistral: "no"
 #enable_mongodb: "no"
 #enable_murano: "no"
+#enable_multipathd: "no"
 #enable_neutron_lbaas: "no"
 #enable_neutron_qos: "no"
 #enable_swift: "no"

releasenotes/notes/add-multipath-9ee29be1fcea6d94.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Add multipathing support to docker container.