Add bootstrap task for ironic-pxe

PXE files should be copied after volume mount to avoid overwrite.

Change-Id: I023cc316e6873abd658478dfa05be839e44a80c7
Closes-bug: #1538164

ansible/roles/ironic/tasks/bootstrap.yml

@@ -52,3 +52,20 @@
   run_once: True
   delegate_to: "{{ groups['ironic-api'][0] }}"
   when: database_created
+
+- name: Running Ironic-PXE bootstrap container
+  kolla_docker:
+    action: "start_container"
+    common_options: "{{ docker_common_options }}"
+    detach: False
+    environment:
+      KOLLA_BOOTSTRAP:
+      KOLLA_CONFIG_STRATEGY: "{{ config_strategy }}"
+    image: "{{ ironic_pxe_image_full }}"
+    name: "bootstrap_ironic_pxe"
+    restart_policy: "never"
+    volumes:
+      - "{{ node_config_directory }}/ironic-pxe/:{{ container_config_directory }}/:ro"
+      - "ironic-pxe:/tftpboot/"
+  run_once: True
+  delegate_to: "{{ groups['ironic-pxe'][0] }}"

docker/ironic/ironic-pxe/Dockerfile.j2

@@ -6,9 +6,7 @@ MAINTAINER {{ maintainer }}
 RUN yum -y install \
         tftp-server \
         syslinux-tftpboot \
-    && yum clean all \
-    && mkdir -p /tftpboot \
-    && cp /var/lib/tftpboot/chain.c32 /tftpboot
+    && yum clean all
 
 {% elif base_distro in ['ubuntu', 'debian'] %}
 
@@ -16,13 +14,12 @@ RUN apt-get install -y --no-install-recommends \
         tftpd-hpa \
         syslinux-common \
         syslinux \
-    && apt-get clean \
-    && mkdir -p /tftpboot \
-    && chown -R ironic: /tftpboot \
-    && cp /usr/lib/syslinux/pxelinux.0 /usr/lib/syslinux/chain.c32 /tftpboot
+    && apt-get clean
 
 {% endif %}
 
 COPY tftp-map-file /map-file
+COPY extend_start.sh /usr/local/bin/kolla_extend_start
+RUN chmod 755 /usr/local/bin/kolla_extend_start
 
 {{ include_footer }}

docker/ironic/ironic-pxe/extend_start.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+# Bootstrap and exit if KOLLA_BOOTSTRAP variable is set. This catches all cases
+# of the KOLLA_BOOTSTRAP variable being set, including empty.
+if [[ "${!KOLLA_BOOTSTRAP[@]}" ]]; then
+    chown -R ironic: /tftpboot
+    for pxe_file in /var/lib/tftpboot/chain.c32 /usr/lib/syslinux/pxelinux.0 /usr/lib/syslinux/chain.c32; do
+        if [[ -e "$pxe_file" ]]; then
+            cp "$pxe_file" /tftpboot
+        fi
+    done
+    exit 0
+fi
+