From 2985cd9a3a04acfe069c063c65ebf487a1413388 Mon Sep 17 00:00:00 2001
From: Dan Prince <dprince@redhat.com>
Date: Wed, 23 Nov 2016 10:39:11 -0500
Subject: Apply os-net-config with a script instead of element

Wire in os-net-config via a normal script heat deployment, which has the
following advantages:

1. Improved error path, currently o-a-c deployments don't report any
errors, thus hang and eventually the deployment times out

2. It's far more hackable from a deployer perspective, e.g it's
much easier to change the os-net-config options or include a
mapping file

3. Reduces our dependencies on o-a-c (it's only os-net-config and hiera
which requires it), although the script does currently still use oac to
get the metadata IP.

4. May enable passing os-net-config yaml via a json parameter in future,
reducing the need for resource_registry mappings (although we'll have to
support that for backwards compatibility)

The script used is based directly on 20-os-net-config (from t-i-e
at cf94c5e, we can probably improve this now that we have an error path,
but for this initial commit it's a straight copy other than the changes to
replace o-a-c for rendering the json config file.

Co-Authored-By: Steven Hardy <shardy@redhat.com>

Change-Id: I0ed08332cfc49a579de2e83960f0d8047690b97a
---
 network/scripts/run-os-net-config.sh | 136 +++++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100755 network/scripts/run-os-net-config.sh

(limited to 'network/scripts/run-os-net-config.sh')

diff --git a/network/scripts/run-os-net-config.sh b/network/scripts/run-os-net-config.sh
new file mode 100755
index 00000000..fc1e6d54
--- /dev/null
+++ b/network/scripts/run-os-net-config.sh
@@ -0,0 +1,136 @@
+#!/bin/bash
+# Note this script expects the following environment variables to be set
+# normally these are provided by the calling SoftwareConfig resource, but
+# they may also be set manually for testing
+# $bridge_name : The bridge device name to apply
+# $interface_name : The interface name to apply
+#
+# Also this token is replaced via a str_replace in the SoftwareConfig running
+# the script - in future we may extend this to also work with a variable, e.g
+# a deployment input via input_values
+# $network_config : the json serialized os-net-config config to apply
+#
+set -ux
+
+function get_metadata_ip() {
+
+  local METADATA_IP
+
+  # Look for a variety of Heat transports
+  # FIXME: Heat should provide a way to obtain this in a single place
+  for URL in os-collect-config.cfn.metadata_url os-collect-config.heat.auth_url os-collect-config.request.metadata_url os-collect-config.zaqar.auth_url; do
+    METADATA_IP=$(os-apply-config --key $URL --key-default '' --type raw 2>/dev/null | sed -e 's|http.*://\([^:]*\).*|\1|')
+    [ -n "$METADATA_IP" ] && break
+  done
+
+  echo $METADATA_IP
+
+}
+
+function is_local_ip() {
+  local IP_TO_CHECK=$1
+  if ip -o a | grep "inet6\? $IP_TO_CHECK/" &>/dev/null; then
+    return 0
+  else
+    return 1
+  fi
+}
+
+function ping_metadata_ip() {
+  local METADATA_IP=$(get_metadata_ip)
+
+  if [ -n "$METADATA_IP" ] && ! is_local_ip $METADATA_IP; then
+
+    echo -n "Trying to ping metadata IP ${METADATA_IP}..."
+
+    local COUNT=0
+    until ping -c 1 $METADATA_IP &> /dev/null; do
+      COUNT=$(( $COUNT + 1 ))
+      if [ $COUNT -eq 10 ]; then
+        echo "FAILURE"
+        echo "$METADATA_IP is not pingable." >&2
+        exit 1
+      fi
+    done
+    echo "SUCCESS"
+
+  else
+    echo "No metadata IP found. Skipping."
+  fi
+}
+
+function configure_safe_defaults() {
+
+[[ $? == 0 ]] && return 0
+
+cat > /etc/os-net-config/dhcp_all_interfaces.yaml <<EOF_CAT
+# This file is an autogenerated safe defaults file for os-net-config
+# which runs DHCP on all discovered interfaces to ensure connectivity
+# back to the undercloud for updates
+network_config:
+EOF_CAT
+
+    for iface in $(ls /sys/class/net | grep -v ^lo$); do
+        local mac_addr_type="$(cat /sys/class/net/${iface}/addr_assign_type)"
+        if [ "$mac_addr_type" != "0" ]; then
+            echo "Device has generated MAC, skipping."
+        else
+            ip link set dev $iface up &>/dev/null
+            HAS_LINK="$(cat /sys/class/net/${iface}/carrier)"
+
+            TRIES=10
+            while [ "$HAS_LINK" == "0" -a $TRIES -gt 0 ]; do
+                HAS_LINK="$(cat /sys/class/net/${iface}/carrier)"
+                if [ "$HAS_LINK" == "1" ]; then
+                    break
+                else
+                    sleep 1
+                fi
+                TRIES=$(( TRIES - 1 ))
+            done
+            if [ "$HAS_LINK" == "1" ] ; then
+cat >> /etc/os-net-config/dhcp_all_interfaces.yaml <<EOF_CAT
+  -
+    type: interface
+    name: $iface
+    use_dhcp: true
+EOF_CAT
+            fi
+        fi
+    done
+    os-net-config -c /etc/os-net-config/dhcp_all_interfaces.yaml -v --detailed-exit-codes --cleanup
+    RETVAL=$?
+    if [[ $RETVAL == 2 ]]; then
+        ping_metadata_ip
+    elif [[ $RETVAL != 0 ]]; then
+        echo "ERROR: configuration of safe defaults failed."
+    fi
+}
+
+if [ -n '$network_config' ]; then
+    trap configure_safe_defaults EXIT
+
+    mkdir -p /etc/os-net-config
+    # Note these variables come from the calling heat SoftwareConfig
+    echo '$network_config' > /etc/os-net-config/config.json
+    sed -i "s/bridge_name/$bridge_name/" /etc/os-net-config/config.json
+    sed -i "s/interface_name/$interface_name/" /etc/os-net-config/config.json
+
+    os-net-config -c /etc/os-net-config/config.json -v --detailed-exit-codes
+    RETVAL=$?
+    if [[ $RETVAL == 2 ]]; then
+        ping_metadata_ip
+
+        #NOTE: dprince this udev rule can apparently leak DHCP processes?
+        # https://bugs.launchpad.net/tripleo/+bug/1538259
+        # until we discover the root cause we can simply disable the
+        # rule because networking has already been configured at this point
+        if [ -f /etc/udev/rules.d/99-dhcp-all-interfaces.rules ]; then
+            rm /etc/udev/rules.d/99-dhcp-all-interfaces.rules
+        fi
+
+    elif [[ $RETVAL != 0 ]]; then
+        echo "ERROR: os-net-config configuration failed." >&2
+        exit 1
+    fi
+fi
-- 
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