improve network configuration

This branch accomplishes several things:
 - centrally handle 'dsmode' to be 'local' or 'net.
   This allows local data sources to run before networking
   but still have user-data read by default when networking is available.

 - support networking information being read on dreamcompute
   dreamcompute's openstack declares networking via the
   /etc/network/interfaces style 'network_config' format.
 
 - support reading and applying networking information on SmartOS

 - improve reading networking from openstack network_data.json (LP: #1577982)
   add support for mtu and routes and many miscellaneous fixes.

 - support for renaming devices in a container (LP: #1579130).
   Also rename network devices as instructed by the host on
   every boot where cloud-init networking is enabled.  This is required
   because a.) containers do not get systemd.link files applied
   as they do not have udev. b.) if the initramfs is out of date
   then we need to apply them.

 - remove blocking of udev rules (LP: #1577844, LP: #1571761)

LP: #1577982, #1579130, #1577844, #1571761

2 files changed, 0 insertions, 80 deletions

diff --git a/udev/79-cloud-init-net-wait.rules b/udev/79-cloud-init-net-wait.rules
deleted file mode 100644
index 8344222a..00000000
--- a/udev/79-cloud-init-net-wait.rules
+++ /dev/null
@@ -1,10 +0,0 @@
-# cloud-init cold/hot-plug blocking mechanism
-# this file blocks further processing of network events
-# until cloud-init local has had a chance to read and apply network
-SUBSYSTEM!="net", GOTO="cloudinit_naming_end"
-ACTION!="add", GOTO="cloudinit_naming_end"
-
-IMPORT{program}="/lib/udev/cloud-init-wait"
-
-LABEL="cloudinit_naming_end"
-# vi: ts=4 expandtab syntax=udevrules
diff --git a/udev/cloud-init-wait b/udev/cloud-init-wait
deleted file mode 100755
index b434005d..00000000
--- a/udev/cloud-init-wait
+++ /dev/null
@@ -1,70 +0,0 @@
-#!/bin/sh
-
-CI_NET_READY="/run/cloud-init/network-config-ready"
-LOG="/run/cloud-init/${0##*/}.log"
-LOG_INIT=0
-MAX_WAIT=60
-DEBUG=0
-
-block_until_ready() {
-    local fname="$1" max="$2"
-    [ -f "$fname" ] && return 0
-    # udevadm settle below will exit at the first of 3 conditions
-    #  1.) timeout 2.) file exists 3.) all in-flight udev events are processed
-    # since this is being run from a udev event, the 3 wont happen.
-    # thus, this is essentially a inotify wait or timeout on a file in /run
-    # that is created by cloud-init-local.
-    udevadm settle "--timeout=$max" "--exit-if-exists=$fname"
-}
-
-log() {
-    [ -n "${LOG}" ] || return
-    [ "${DEBUG:-0}" = "0" ] && return
-
-    if [ $LOG_INIT = 0 ]; then
-        if [ -d "${LOG%/*}" ] || mkdir -p "${LOG%/*}"; then
-            LOG_INIT=1
-        else
-            echo "${0##*/}: WARN: log init to ${LOG%/*}" 1>&2
-            return
-        fi
-    elif [ "$LOG_INIT" = "-1" ]; then
-        return
-    fi
-    local info="$$ $INTERFACE"
-    if [ "$DEBUG" -gt 1 ]; then
-       local up idle
-       read up idle < /proc/uptime
-       info="$$ $INTERFACE $up"
-    fi
-    echo "[$info]" "$@" >> "$LOG"
-}
-
-main() {
-    local name="" readyfile="$CI_NET_READY"
-    local info="INTERFACE=${INTERFACE} ID_NET_NAME=${ID_NET_NAME}"
-    info="$info ID_NET_NAME_PATH=${ID_NET_NAME_PATH}"
-    info="$info MAC_ADDRESS=${MAC_ADDRESS}"
-    log "$info"
-
-    ## Check to see if cloud-init.target is set.  If cloud-init is 
-    ## disabled we do not want to do anything.
-    if [ ! -f "/run/cloud-init/enabled" ]; then
-        log "cloud-init disabled"
-        return 0
-    fi
-
-    if [ "${INTERFACE#lo}" != "$INTERFACE" ]; then
-        return 0
-    fi
-
-    block_until_ready "$readyfile" "$MAX_WAIT" ||
-       { log "failed waiting for ready on $INTERFACE"; return 1; }
-
-    log "net config ready"
-}
-
-main "$@"
-exit
-
-# vi: ts=4 expandtab