ceph-volume: Set max open files limit on container

The ceph-volume lvm list command takes ages to complete when having
a lot of LV devices on containerized deployment.
For instance, with 25 OSDs on a node it takes 3 mins 44s to list the
OSD.
Adding the max open files limit to the container engine cli when
executing the ceph-volume command seems to improve a lot thee
execution time ~30s.

This was impacting the OSDs creation with ceph-volume (both filestore
and bluestore) when using multiple LV devices.

Closes: https://bugzilla.redhat.com/show_bug.cgi?id=1702285

Signed-off-by: Dimitri Savineau <dsavinea@redhat.com>
(cherry picked from commit b987534881)

library/ceph_volume.py

@@ -183,6 +183,7 @@ def container_exec(binary, container_image):
     Build the docker CLI to run a command inside a container
     '''
     command_exec = ['docker', 'run', '--rm', '--privileged', '--net=host', '--ipc=host',
+                    '--ulimit', 'nofile=1024:1024',
                     '-v', '/run/lock/lvm:/run/lock/lvm:z',
                     '-v', '/var/run/udev/:/var/run/udev/:z',
                     '-v', '/dev:/dev', '-v', '/etc/ceph:/etc/ceph:z',

library/test_ceph_volume.py

@@ -40,6 +40,7 @@ class TestCephVolumeModule(object):
         fake_binary = "ceph-volume"
         fake_container_image = "docker.io/ceph/daemon:latest-luminous"
         expected_command_list = ['docker', 'run', '--rm', '--privileged', '--net=host', '--ipc=host',  # noqa E501
+                                 '--ulimit', 'nofile=1024:1024',
                                  '-v', '/run/lock/lvm:/run/lock/lvm:z',
                                  '-v', '/var/run/udev/:/var/run/udev/:z',
                                  '-v', '/dev:/dev', '-v', '/etc/ceph:/etc/ceph:z',  # noqa E501
@@ -56,6 +57,7 @@ class TestCephVolumeModule(object):
         fake_module.params = {'data': '/dev/sda'}
         fake_container_image = "docker.io/ceph/daemon:latest-luminous"
         expected_command_list = ['docker', 'run', '--rm', '--privileged', '--net=host', '--ipc=host',  # noqa E501
+                                 '--ulimit', 'nofile=1024:1024',
                                  '-v', '/run/lock/lvm:/run/lock/lvm:z',
                                  '-v', '/var/run/udev/:/var/run/udev/:z',
                                  '-v', '/dev:/dev', '-v', '/etc/ceph:/etc/ceph:z',  # noqa E501
@@ -124,6 +126,7 @@ class TestCephVolumeModule(object):
         fake_module.params = {'cluster': 'ceph', 'data': '/dev/sda'}
         fake_container_image = "docker.io/ceph/daemon:latest-luminous"
         expected_command_list = ['docker', 'run', '--rm', '--privileged', '--net=host', '--ipc=host',  # noqa E501
+                                 '--ulimit', 'nofile=1024:1024',
                                  '-v', '/run/lock/lvm:/run/lock/lvm:z',
                                  '-v', '/var/run/udev/:/var/run/udev/:z',
                                  '-v', '/dev:/dev', '-v', '/etc/ceph:/etc/ceph:z',  # noqa E501
@@ -151,6 +154,7 @@ class TestCephVolumeModule(object):
         fake_action = "create"
         fake_container_image = "docker.io/ceph/daemon:latest-luminous"
         expected_command_list = ['docker', 'run', '--rm', '--privileged', '--net=host', '--ipc=host',  # noqa E501
+                                 '--ulimit', 'nofile=1024:1024',
                                  '-v', '/run/lock/lvm:/run/lock/lvm:z',
                                  '-v', '/var/run/udev/:/var/run/udev/:z',
                                  '-v', '/dev:/dev', '-v', '/etc/ceph:/etc/ceph:z',  # noqa E501
@@ -199,6 +203,7 @@ class TestCephVolumeModule(object):
         fake_action = "prepare"
         fake_container_image = "docker.io/ceph/daemon:latest-luminous"
         expected_command_list = ['docker', 'run', '--rm', '--privileged', '--net=host', '--ipc=host',  # noqa E501
+                                 '--ulimit', 'nofile=1024:1024',
                                  '-v', '/run/lock/lvm:/run/lock/lvm:z',
                                  '-v', '/var/run/udev/:/var/run/udev/:z',
                                  '-v', '/dev:/dev', '-v', '/etc/ceph:/etc/ceph:z',  # noqa E501
@@ -248,6 +253,7 @@ class TestCephVolumeModule(object):
 
         fake_container_image = "docker.io/ceph/daemon:latest-luminous"
         expected_command_list = ['docker', 'run', '--rm', '--privileged', '--net=host', '--ipc=host',  # noqa E501
+                                 '--ulimit', 'nofile=1024:1024',
                                  '-v', '/run/lock/lvm:/run/lock/lvm:z',
                                  '-v', '/var/run/udev/:/var/run/udev/:z',
                                  '-v', '/dev:/dev', '-v', '/etc/ceph:/etc/ceph:z',  # noqa E501

roles/ceph-osd/tasks/start_osds.yml

@@ -48,7 +48,7 @@
 
 - name: set_fact docker_exec_start_osd
   set_fact:
-    docker_exec_start_osd: "{{ 'docker run --rm --privileged=true -v /run/lvm/lvmetad.socket:/run/lvm/lvmetad.socket -v /var/run/udev/:/var/run/udev/:z -v /etc/ceph:/etc/ceph:z -v /dev:/dev --entrypoint=ceph-volume ' + ceph_docker_registry + '/' + ceph_docker_image + ':' + ceph_docker_image_tag if containerized_deployment else 'ceph-volume' }}"
+    docker_exec_start_osd: "{{ 'docker run --rm --ulimit nofile=1024:1024 --privileged=true -v /run/lvm/lvmetad.socket:/run/lvm/lvmetad.socket -v /var/run/udev/:/var/run/udev/:z -v /etc/ceph:/etc/ceph:z -v /dev:/dev --entrypoint=ceph-volume ' + ceph_docker_registry + '/' + ceph_docker_image + ':' + ceph_docker_image_tag if containerized_deployment else 'ceph-volume' }}"
 
 - name: collect osd ids
   shell: >