From 0df21b6ea89697e8700ad51158327533aa573c91 Mon Sep 17 00:00:00 2001
From: Scott Moser <smoser@brickies.net>
Date: Thu, 9 Feb 2017 10:56:01 -0500
Subject: support nova-lxd by reading platform from environment of pid 1.

Nova lxd will now put the environment variable 'platform' into
pid 1's environment to the value 'OpenStack Nova', which is the same as
you would find in kvm guests.

LP: #1661797
---
 tools/ds-identify | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/tools/ds-identify b/tools/ds-identify
index f07866a2..88094af7 100755
--- a/tools/ds-identify
+++ b/tools/ds-identify
@@ -62,6 +62,7 @@ PATH_VAR_LIB_CLOUD="${PATH_VAR_LIB_CLOUD:-${PATH_ROOT}/var/lib/cloud}"
 PATH_DI_CONFIG="${PATH_DI_CONFIG:-${PATH_ROOT}/etc/cloud/ds-identify.cfg}"
 PATH_PROC_CMDLINE="${PATH_PROC_CMDLINE:-${PATH_ROOT}/proc/cmdline}"
 PATH_PROC_1_CMDLINE="${PATH_PROC_1_CMDLINE:-${PATH_ROOT}/proc/1/cmdline}"
+PATH_PROC_1_ENVIRON="${PATH_PROC_1_ENVIRON:-${PATH_ROOT}/proc/1/environ}"
 PATH_CLOUD_CONFD="${PATH_CLOUD_CONFD:-${PATH_ROOT}/etc/cloud}"
 PATH_RUN_CI="${PATH_RUN_CI:-${PATH_RUN}/cloud-init}"
 PATH_RUN_CI_CFG=${PATH_RUN_CI_CFG:-${PATH_RUN_CI}/cloud.cfg}
@@ -81,6 +82,7 @@ DI_DMI_PRODUCT_UUID=""
 DI_FS_LABELS=""
 DI_KERNEL_CMDLINE=""
 DI_VIRT=""
+DI_PID_1_PLATFORM=""
 
 DI_UNAME_KERNEL_NAME=""
 DI_UNAME_KERNEL_RELEASE=""
@@ -350,6 +352,21 @@ read_datasource_list() {
     return 0
 }
 
+read_pid1_platform() {
+    local oifs="$IFS" out="" tok="" key="" val="" platform="${UNAVAILABLE}"
+    cached "${DI_PID_1_PLATFORM}" && return
+    [ -r "${PATH_PROC_1_ENVIRON}" ] || return
+    out=$(tr '\0' '\n' <"${PATH_PROC_1_ENVIRON}")
+    IFS="$CR"; set -- $out; IFS="$oifs"
+    for tok in "$@"; do
+        key=${tok%%=*}
+        [ "$key" != "$tok" ] || continue
+        val=${tok#*=}
+        [ "$key" = "platform" ] && platform="$val" && break
+    done
+    DI_PID_1_PLATFORM="$platform"
+}
+
 dmi_product_name_matches() {
     is_container && return 1
     case "${DI_DMI_PRODUCT_NAME}" in
@@ -625,13 +642,9 @@ dscheck_OpenStack() {
     if dmi_product_name_is "OpenStack Nova"; then
         return ${DS_FOUND}
     fi
-    case "${DI_VIRT}" in
-        lxc|lxc-libvirt)
-            # FIXME: This could be container on openstack (nova-lxd)
-            # or nova-libvirt-lxc
-            return ${DS_NOT_FOUND}
-            ;;
-    esac
+    if [ "${DI_PID_1_PLATFORM}" = "OpenStack Nova" ]; then
+        return ${DS_FOUND}
+    fi
 
     return ${DS_NOT_FOUND}
 }
@@ -697,6 +710,7 @@ dscheck_None() {
 
 collect_info() {
     read_virt
+    read_pid1_platform
     read_kernel_cmdline
     read_uname_info
     read_config
@@ -716,7 +730,7 @@ print_info() {
 _print_info() {
     local n="" v="" vars=""
     vars="DMI_PRODUCT_NAME DMI_SYS_VENDOR DMI_PRODUCT_SERIAL"
-    vars="$vars DMI_PRODUCT_UUID"
+    vars="$vars DMI_PRODUCT_UUID PID_1_PLATFORM"
     vars="$vars FS_LABELS KERNEL_CMDLINE VIRT"
     vars="$vars UNAME_KERNEL_NAME UNAME_KERNEL_RELEASE UNAME_KERNEL_VERSION"
     vars="$vars UNAME_MACHINE UNAME_NODENAME UNAME_OPERATING_SYSTEM"
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