Support HTTP boot

MaaS 2.3 now supports serving ephemeral
images via HTTP instead of iSCSI

Change-Id: I6c8d4d2c89cfc40f5352edc04bffa5b27ec785df

charts/maas/templates/bin/_import-boot-resources.sh.tpl

@@ -55,6 +55,7 @@ function configure_boot_sources {
   then
     maas ${ADMIN_USERNAME} boot-source update 1 url=http://localhost:8888/maas/images/ephemeral-v3/daily/
   fi
+  maas ${ADMIN_USERNAME} maas set-config name=http_boot value=${MAAS_HTTP_BOOT}
 }
 
 KEY=$(maas-region apikey --username=${ADMIN_USERNAME})

charts/maas/templates/job-import.yaml

@@ -56,6 +56,8 @@ spec:
               value: {{ .Values.conf.maas.proxy.peer_proxy_enabled | quote }}
             - name: MAAS_PROXY_SERVER
               value: {{ .Values.conf.maas.proxy.proxy_server }}
+            - name: MAAS_HTTP_BOOT
+              value: {{ .Values.conf.maas.http_boot | quote }}
             - name: MAAS_NTP_SERVERS
               value: {{ .Values.conf.maas.ntp.ntp_servers }}
             - name: MAAS_NTP_EXTERNAL_ONLY

charts/maas/values.yaml

@@ -123,6 +123,7 @@ conf:
   maas:
     override:
     append:
+    http_boot: true
     url:
       maas_url: null
     ntp: