Merge lp:~gandelman-a/charms/precise/nova-compute/https_endpoint into lp:~openstack-charmers/charms/precise/nova-compute/ha-support

[Adam Gandelman]

Required nova-compute changes for HTTPS support.

[James Page (james-page)]

Works for me!

review: Approve

[lp:~gandelman-a/charms/precise/nova-compute/https_endpoint]

52. By Adam Gandelman on 2013-03-08

Rebase against current ha-support branch.

=== modified file 'hooks/lib/openstack-common'
--- hooks/lib/openstack-common	2013-03-08 21:13:57 +0000
+++ hooks/lib/openstack-common	2013-03-08 21:37:22 +0000
@@ -321,7 +321,6 @@
 
 HAPROXY_CFG=/etc/haproxy/haproxy.cfg
 HAPROXY_DEFAULT=/etc/default/haproxy
-
 ##########################################################################
 # Description: Configures HAProxy services for Openstack API's
 # Parameters:
@@ -330,9 +329,8 @@
 #   assumes the name of the peer relation is 'cluster' and that every
 #   service unit in the peer relation is running the same services.
 #
-#   The HAProxy service will listen on port + 10000.
-# Example:
-#   configure_haproxy cinder_api:12345 nova_api:9999
+# Example
+#   configure_haproxy cinder_api:8776:8756i nova_api:8774:8764
 ##########################################################################
 configure_haproxy() {
   local address=`unit-get private-address`
@@ -368,14 +366,18 @@
 EOF
   for service in $@; do
     local service_name=$(echo $service | cut -d : -f 1)
-    local api_listen_port=$(echo $service | cut -d : -f 2)
-    local haproxy_listen_port=$(($api_listen_port + 10000))
+    local haproxy_listen_port=$(echo $service | cut -d : -f 2)
+    local api_listen_port=$(echo $service | cut -d : -f 3)
+    juju-log "Adding haproxy configuration entry for $service "\
+             "($haproxy_listen_port -> $api_listen_port)"
     cat >> $HAPROXY_CFG << EOF
 listen $service_name 0.0.0.0:$haproxy_listen_port
   balance roundrobin
   option tcplog
   server $name $address:$api_listen_port check
 EOF
+    local r_id=""
+    local unit=""
     for r_id in `relation-ids cluster`; do
       for unit in `relation-list -r $r_id`; do
         local unit_name=${unit////-}
@@ -388,6 +390,7 @@
     done
   done
   echo "ENABLED=1" > $HAPROXY_DEFAULT
+  service haproxy restart
 }
 
 ##########################################################################
@@ -395,18 +398,20 @@
 # Returns: 0 if configured, 1 if not configured
 ##########################################################################
 is_clustered() {
+  local r_id=""
+  local unit=""
   for r_id in $(relation-ids ha); do
     if [ -n "$r_id" ]; then
       for unit in $(relation-list -r $r_id); do
          clustered=$(relation-get -r $r_id clustered $unit)
          if [ -n "$clustered" ]; then
-           echo "Unit is clustered"
+           juju-log "Unit is haclustered"
            return 0
          fi
       done
     fi
   done
-  echo "Unit is not clustered"
+  juju-log "Unit is not haclustered"
   return 1
 }
 
@@ -415,6 +420,7 @@
 ##########################################################################
 peer_units() {
   local peers=""
+  local r_id=""
   for r_id in $(relation-ids cluster); do
     peers="$peers $(relation-list -r $r_id)"
   done
@@ -433,11 +439,11 @@
     echo "Comparing $JUJU_UNIT_NAME with peers: $peers"
     local r_unit_no=$(echo $peer | cut -d / -f 2)
     if (($r_unit_no<$l_unit_no)); then
-        echo "Not oldest peer; deferring"
+        juju-log "Not oldest peer; deferring"
         return 1
     fi
   done
-  echo "Oldest peer; might take charge?"
+  juju-log "Oldest peer; might take charge?"
   return 0
 }
 
@@ -451,13 +457,13 @@
 eligible_leader() {
   if is_clustered; then
     if ! is_leader $1; then
-      echo 'Deferring action to CRM leader'
+      juju-log 'Deferring action to CRM leader'
       return 1
     fi
   else
     peers=$(peer_units)
     if [ -n "$peers" ] && ! oldest_peer "$peers"; then
-      echo 'Deferring action to oldest service unit.'
+      juju-log 'Deferring action to oldest service unit.'
       return 1
     fi
   fi
@@ -469,14 +475,14 @@
 # Returns: 0 if peered, 1 if not peered
 ##########################################################################
 is_peered() {
-  r_id=$(relation-ids cluster)
+  local r_id=$(relation-ids cluster)
   if [ -n "$r_id" ]; then
     if [ -n "$(relation-list -r $r_id)" ]; then
-      echo "Unit peered"
+      juju-log "Unit peered"
       return 0
     fi
   fi
-  echo "Unit not peered"
+  juju-log "Unit not peered"
   return 1
 }
 
@@ -489,12 +495,207 @@
   hostname=`hostname`
   if [ -x /usr/sbin/crm ]; then
     if crm resource show $1 | grep -q $hostname; then
-      echo "$hostname is cluster leader"
+      juju-log "$hostname is cluster leader."
       return 0
     fi
   fi
-  echo "$hostname is not cluster leader"
-  return 1
+  juju-log "$hostname is not cluster leader."
+  return 1
+}
+
+##########################################################################
+# Description: Determines whether enough data has been provided in
+# configuration or relation data to configure HTTPS.
+# Parameters:  None
+# Returns: 0 if HTTPS can be configured, 1 if not.
+##########################################################################
+https() {
+  local r_id=""
+  if [[ -n "$(config-get ssl_cert)" ]] &&
+     [[ -n "$(config-get ssl_key)" ]] ; then
+    return 0
+  fi
+  for r_id in $(relation-ids identity-service) ; do
+    for unit in $(relation-list -r $r_id) ; do
+      if [[ "$(relation-get -r $r_id https_keystone $unit)" == "True" ]] &&
+         [[ -n "$(relation-get -r $r_id ssl_cert $unit)" ]] &&
+         [[ -n "$(relation-get -r $r_id ssl_key $unit)" ]] &&
+         [[ -n "$(relation-get -r $r_id ca_cert $unit)" ]] ; then
+          return 0
+      fi
+    done
+  done
+  return 1
+}
+
+##########################################################################
+# Description: For a given number of port mappings, configures apache2
+# HTTPs local reverse proxying using certficates and keys provided in
+# either configuration data (preferred) or relation data.  Assumes ports
+# are not in use (calling charm should ensure that).
+# Parameters:  Variable number of proxy port mappings as
+# $internal:$external.
+# Returns: 0 if reverse proxy(s) have been configured, 0 if not.
+##########################################################################
+enable_https() {
+  local port_maps="$@"
+  local http_restart=""
+  juju-log "Enabling HTTPS for port mappings: $port_maps."
+
+  # allow overriding of keystone provided certs with those set manually
+  # in config.
+  local cert=$(config-get ssl_cert)
+  local key=$(config-get ssl_key)
+  local ca_cert=""
+  if [[ -z "$cert" ]] || [[ -z "$key" ]] ; then
+    juju-log "Inspecting identity-service relations for SSL certificate."
+    local r_id=""
+    cert=""
+    key=""
+    ca_cert=""
+    for r_id in $(relation-ids identity-service) ; do
+      for unit in $(relation-list -r $r_id) ; do
+        [[ -z "$cert" ]] && cert="$(relation-get -r $r_id ssl_cert $unit)"
+        [[ -z "$key" ]] && key="$(relation-get -r $r_id ssl_key $unit)"
+        [[ -z "$ca_cert" ]] && ca_cert="$(relation-get -r $r_id ca_cert $unit)"
+      done
+    done
+    [[ -n "$cert" ]] && cert=$(echo $cert | base64 -di)
+    [[ -n "$key" ]] && key=$(echo $key | base64 -di)
+    [[ -n "$ca_cert" ]] && ca_cert=$(echo $ca_cert | base64 -di)
+  else
+    juju-log "Using SSL certificate provided in service config."
+  fi
+
+  [[ -z "$cert" ]] || [[ -z "$key" ]] &&
+    juju-log "Expected but could not find SSL certificate data, not "\
+             "configuring HTTPS!" && return 1
+
+  apt-get -y install apache2
+  a2enmod ssl proxy proxy_http | grep -v "To activate the new configuration" &&
+    http_restart=1
+
+  mkdir -p /etc/apache2/ssl/$CHARM
+  echo "$cert" >/etc/apache2/ssl/$CHARM/cert
+  echo "$key" >/etc/apache2/ssl/$CHARM/key
+  if [[ -n "$ca_cert" ]] ; then
+    juju-log "Installing Keystone supplied CA cert."
+    echo "$ca_cert" >/usr/local/share/ca-certificates/keystone_juju_ca_cert.crt
+    update-ca-certificates --fresh
+
+    # XXX TODO: Find a better way of exporting this?
+    if [[ "$CHARM" == "nova-cloud-controller" ]] ; then
+      [[ -e /var/www/keystone_juju_ca_cert.crt ]] &&
+        rm -rf /var/www/keystone_juju_ca_cert.crt
+      ln -s  /usr/local/share/ca-certificates/keystone_juju_ca_cert.crt \
+             /var/www/keystone_juju_ca_cert.crt
+    fi
+
+  fi
+  for port_map in $port_maps ; do
+    local ext_port=$(echo $port_map | cut -d: -f1)
+    local int_port=$(echo $port_map | cut -d: -f2)
+    juju-log "Creating apache2 reverse proxy vhost for $port_map."
+    cat >/etc/apache2/sites-available/${CHARM}_${ext_port} <<END
+Listen $ext_port
+NameVirtualHost *:$ext_port
+<VirtualHost *:$ext_port>
+    ServerName $(unit-get private-address)
+    SSLEngine on
+    SSLCertificateFile /etc/apache2/ssl/$CHARM/cert
+    SSLCertificateKeyFile /etc/apache2/ssl/$CHARM/key
+    ProxyPass / http://localhost:$int_port/
+    ProxyPassReverse / http://localhost:$int_port/
+    ProxyPreserveHost on
+</VirtualHost>
+<Proxy *>
+    Order deny,allow
+    Allow from all
+</Proxy>
+<Location />
+    Order allow,deny
+    Allow from all
+</Location>
+END
+    a2ensite ${CHARM}_${ext_port} | grep -v "To activate the new configuration" &&
+      http_restart=1
+  done
+  if [[ -n "$http_restart" ]] ; then
+    service apache2 restart
+  fi
+}
+
+##########################################################################
+# Description: Ensure HTTPS reverse proxying is disabled for given port
+# mappings.
+# Parameters:  Variable number of proxy port mappings as
+# $internal:$external.
+# Returns: 0 if reverse proxy is not active for all portmaps, 1 on error.
+##########################################################################
+disable_https() {
+  local port_maps="$@"
+  local http_restart=""
+  juju-log "Ensuring HTTPS disabled for $port_maps."
+  ( [[ ! -d /etc/apache2 ]] || [[ ! -d /etc/apache2/ssl/$CHARM ]] ) && return 0
+  for port_map in $port_maps ; do
+    local ext_port=$(echo $port_map | cut -d: -f1)
+    local int_port=$(echo $port_map | cut -d: -f2)
+    if [[ -e /etc/apache2/sites-available/${CHARM}_${ext_port} ]] ; then
+      juju-log "Disabling HTTPS reverse proxy for $CHARM $port_map."
+      a2dissite ${CHARM}_${ext_port} | grep -v "To activate the new configuration" &&
+        http_restart=1
+    fi
+  done
+  if [[ -n "$http_restart" ]] ; then
+    service apache2 restart
+  fi
+}
+
+
+##########################################################################
+# Description: Ensures HTTPS is either enabled or disabled for given port
+# mapping.
+# Parameters:  Variable number of proxy port mappings as
+# $internal:$external.
+# Returns: 0 if HTTPS reverse proxy is in place, 1 if it is not.
+##########################################################################
+setup_https() {
+  # configure https via apache reverse proxying either
+  # using certs provided by config or keystone.
+  [[ -z "$CHARM" ]] &&
+    error_out "setup_https(): CHARM not set."
+  if ! https ; then
+    disable_https $@
+  else
+    enable_https $@
+  fi
+}
+
+##########################################################################
+# Description: Determine correct API server listening port based on
+# existence of HTTPS reverse proxy and/or haproxy.
+# Paremeters: The standard public port for given service.
+# Returns: The correct listening port for API service.
+##########################################################################
+determine_api_port() {
+  local public_port="$1"
+  local i=0
+  ( [[ -n "$(peer_units)" ]] || is_clustered >/dev/null 2>&1 ) && i=$[$i + 1]
+  https >/dev/null 2>&1 && i=$[$i + 1]
+  echo $[$public_port - $[$i * 10]]
+}
+
+##########################################################################
+# Description: Determine correct proxy listening port based on public IP +
+# existence of HTTPS reverse proxy.
+# Paremeters: The standard public port for given service.
+# Returns: The correct listening port for haproxy service public address.
+##########################################################################
+determine_haproxy_port() {
+  local public_port="$1"
+  local i=0
+  https >/dev/null 2>&1 && i=$[$i + 1]
+  echo $[$public_port - $[$i * 10]]
 }
 
 ##########################################################################
 
=== modified file 'hooks/nova-compute-common'
--- hooks/nova-compute-common	2013-01-18 12:37:32 +0000
+++ hooks/nova-compute-common	2013-03-08 21:37:22 +0000
@@ -130,7 +130,7 @@
         && exit 0
       set_or_update "network_api_class" "nova.network.quantumv2.api.API"
       set_or_update "quantum_auth_strategy" "keystone"
-      set_or_update "quantum_url" "http://$(relation-get quantum_host):9696"
+      set_or_update "quantum_url" "$(relation-get quantum_url)"
       set_or_update "quantum_admin_tenant_name" "$(relation-get service_tenant)"
       set_or_update "quantum_admin_username" "$(relation-get service_username)"
       set_or_update "quantum_admin_password" "$(relation-get service_password)"
 
=== modified file 'hooks/nova-compute-relations'
--- hooks/nova-compute-relations	2013-01-25 15:19:57 +0000
+++ hooks/nova-compute-relations	2013-03-08 21:37:22 +0000
@@ -217,6 +217,16 @@
     esac
   fi
 
+  # If Keytone is configured manage SSL certs, nova-compute needs a copy
+  # of its CA installed.
+  local ca_cert="$(relation-get ca_cert)"
+  if [[ -n "$ca_cert" ]] ; then
+    juju-log "Installing Keystone CA certificate."
+    ca_cert="$(echo $ca_cert | base64 -di)"
+    echo "$ca_cert" >/usr/local/share/ca-certificates/keystone_juju_ca_cert.crt
+    update-ca-certificates
+  fi
+
   # restart on all changed events. nova-c-c may send out a uuid to trigger
   # remote restarts of services here (after db migrations, for instance)
   service_ctl all restart
 
=== modified file 'revision'
--- revision	2013-03-05 17:25:32 +0000
+++ revision	2013-03-08 21:37:22 +0000
@@ -1,1 +1,1 @@
-84
+86