Merge pull request #1027 from MSOpenTech/azure-scripts

Add salt configuration for openvpn for use on Azure.

cluster/azure/templates/salt-master.sh

@@ -41,6 +41,14 @@ EOF
 mkdir -p /srv/salt/nginx
 echo $MASTER_HTPASSWD > /srv/salt/nginx/htpasswd
 
+mkdir -p /etc/openvpn
+umask=$(umask)
+umask 0066
+echo "$CA_CRT" > /etc/openvpn/ca.crt
+echo "$SERVER_CRT" > /etc/openvpn/server.crt
+echo "$SERVER_KEY" > /etc/openvpn/server.key
+umask $umask
+
 # Install Salt
 #
 # We specify -X to avoid a race condition that can cause minion failure to

cluster/azure/templates/salt-minion.sh

@@ -14,6 +14,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+mkdir -p /etc/openvpn
+umask=$(umask)
+umask 0066
+echo "$CA_CRT" > /etc/openvpn/ca.crt
+echo "$CLIENT_CRT" > /etc/openvpn/client.crt
+echo "$CLIENT_KEY" > /etc/openvpn/client.key
+umask $umask
+
 # Prepopulate the name of the Master
 mkdir -p /etc/salt/minion.d
 echo "master: $MASTER_NAME" > /etc/salt/minion.d/master.conf
@@ -22,6 +30,10 @@ echo "master: $MASTER_NAME" > /etc/salt/minion.d/master.conf
 # echo "DAEMON_ARGS=\"\$DAEMON_ARGS --log-file-level=debug\"" > /etc/default/salt-minion
 
 hostnamef=$(hostname -f)
+sudo apt-get install ipcalc
+netmask=$(ipcalc $MINION_IP_RANGE | grep Netmask | awk '{ print $2 }')
+network=$(ipcalc $MINION_IP_RANGE | grep Address | awk '{ print $2 }')
+cbrstring="$network $netmask"
 
 # Our minions will have a pool role to distinguish them from the master.
 cat <<EOF >/etc/salt/minion.d/grains.conf
@@ -31,6 +43,7 @@ grains:
   cbr-cidr: $MINION_IP_RANGE
   cloud: azure
   hostnamef: $hostnamef
+  cbr-string: $cbrstring
 EOF
 
 # Install Salt

cluster/azure/util.sh

@@ -70,12 +70,47 @@ function kube-up {
         ${KUBE_TEMP}/htpasswd $user $passwd
     HTPASSWD=$(cat ${KUBE_TEMP}/htpasswd)
 
+    # Generate openvpn certs
+    echo 01 > ${KUBE_TEMP}/ca.srl
+    openssl genrsa -out ${KUBE_TEMP}/ca.key
+    openssl req -new -x509 -days 1095 \
+        -key ${KUBE_TEMP}/ca.key \
+        -out ${KUBE_TEMP}/ca.crt \
+        -subj "/CN=openvpn-ca"
+    openssl genrsa -out ${KUBE_TEMP}/server.key
+    openssl req -new \
+        -key ${KUBE_TEMP}/server.key \
+        -out ${KUBE_TEMP}/server.csr \
+        -subj "/CN=server"
+    openssl x509 -req -days 1095 \
+        -in ${KUBE_TEMP}/server.csr \
+        -CA ${KUBE_TEMP}/ca.crt \
+        -CAkey ${KUBE_TEMP}/ca.key \
+        -CAserial ${KUBE_TEMP}/ca.srl \
+        -out ${KUBE_TEMP}/server.crt
+    for (( i=0; i<${#MINION_NAMES[@]}; i++)); do
+        openssl genrsa -out ${KUBE_TEMP}/${MINION_NAMES[$i]}.key
+        openssl req -new \
+            -key ${KUBE_TEMP}/${MINION_NAMES[$i]}.key \
+            -out ${KUBE_TEMP}/${MINION_NAMES[$i]}.csr \
+            -subj "/CN=${MINION_NAMES[$i]}"
+        openssl x509 -req -days 1095 \
+            -in ${KUBE_TEMP}/${MINION_NAMES[$i]}.csr \
+            -CA ${KUBE_TEMP}/ca.crt \
+            -CAkey ${KUBE_TEMP}/ca.key \
+            -CAserial ${KUBE_TEMP}/ca.srl \
+            -out ${KUBE_TEMP}/${MINION_NAMES[$i]}.crt
+    done
+
     # Build up start up script for master
     (
         echo "#!/bin/bash"
         echo "MASTER_NAME=${MASTER_NAME}"
         echo "MASTER_RELEASE_TAR=${FULL_URL}"
         echo "MASTER_HTPASSWD='${HTPASSWD}'"
+        echo "CA_CRT=\"$(cat ${KUBE_TEMP}/ca.crt)\""
+        echo "SERVER_CRT=\"$(cat ${KUBE_TEMP}/server.crt)\""
+        echo "SERVER_KEY=\"$(cat ${KUBE_TEMP}/server.key)\""
         grep -v "^#" $SCRIPT_DIR/azure/templates/download-release.sh
         grep -v "^#" $SCRIPT_DIR/azure/templates/salt-master.sh
     ) > ${KUBE_TEMP}/master-start.sh
@@ -87,11 +122,8 @@ function kube-up {
     fi
 
     if [ ! -f $AZ_SSH_CERT ]; then
-        openssl req -new -key $AZ_SSH_KEY -out ${KUBE_TEMP}/temp.csr \
-            -subj "/C=US/ST=WA/L=Redmond/O=Azure-CLI/CN=Azure"
-        openssl req -x509 -key $AZ_SSH_KEY -in ${KUBE_TEMP}/temp.csr \
-            -out $AZ_SSH_CERT -days 1095
-        rm ${KUBE_TEMP}/temp.csr
+        openssl req -new -x509 -days 1095 -key $AZ_SSH_KEY -out $AZ_SSH_CERT \
+            -subj "/CN=azure-ssh-key"
     fi
 
     if [ -z "$(azure network vnet show $AZ_VNET 2>/dev/null | grep data)" ]; then
@@ -118,6 +150,9 @@ function kube-up {
             echo "#!/bin/bash"
             echo "MASTER_NAME=${MASTER_NAME}"
             echo "MINION_IP_RANGE=${MINION_IP_RANGES[$i]}"
+            echo "CA_CRT=\"$(cat ${KUBE_TEMP}/ca.crt)\""
+            echo "CLIENT_CRT=\"$(cat ${KUBE_TEMP}/${MINION_NAMES[$i]}.crt)\""
+            echo "CLIENT_KEY=\"$(cat ${KUBE_TEMP}/${MINION_NAMES[$i]}.key)\""
             grep -v "^#" $SCRIPT_DIR/azure/templates/salt-minion.sh
         ) > ${KUBE_TEMP}/minion-start-${i}.sh
 

cluster/saltbase/salt/openvpn-client/client.conf

@@ -0,0 +1,53 @@
+# Specify that we are a client and that we
+# will be pulling certain config file directives
+# from the server.
+client
+
+# Use the same setting as you are using on
+# the server.
+# On most systems, the VPN will not function
+# unless you partially or fully disable
+# the firewall for the TUN/TAP interface.
+dev tun
+
+# Are we connecting to a TCP or
+# UDP server?  Use the same setting as
+# on the server.
+proto udp
+
+# The hostname/IP and port of the server.
+# You can have multiple remote entries
+# to load balance between the servers.
+remote {{ salt['mine.get']('roles:kubernetes-master', 'network.ip_addrs', 'grain').keys()[0] }} 1194
+
+# Keep trying indefinitely to resolve the
+# host name of the OpenVPN server.  Very useful
+# on machines which are not permanently connected
+# to the internet such as laptops.
+resolv-retry infinite
+
+# Most clients don't need to bind to
+# a specific local port number.
+nobind
+
+# Try to preserve some state across restarts.
+persist-key
+persist-tun
+
+# SSL/TLS parms.
+# See the server config file for more
+# description.  It's best to use
+# a separate .crt/.key file pair
+# for each client.  A single ca
+# file can be used for all clients.
+ca /etc/openvpn/ca.crt
+cert /etc/openvpn/client.crt
+key /etc/openvpn/client.key
+
+# Enable compression on the VPN link.
+# Don't enable this unless it is also
+# enabled in the server config file.
+comp-lzo
+
+# Set log file verbosity.
+verb 3

cluster/saltbase/salt/openvpn-client/init.sls

@@ -0,0 +1,16 @@
+/etc/openvpn/client.conf:
+  file.managed:
+    - source: salt://openvpn-client/client.conf
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+
+openvpn:
+  pkg:
+    - latest
+  service.running:
+    - enable: True
+    - watch:
+      - file: /etc/openvpn/client.conf

cluster/saltbase/salt/openvpn/init.sls

@@ -0,0 +1,31 @@
+/etc/openvpn/server.conf:
+  file.managed:
+    - source: salt://openvpn/server.conf
+    - template: jinja
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+
+{% for (minion, grains) in salt['mine.get']('roles:kubernetes-pool', 'grains.items', expr_form='grain').items() %}
+/etc/openvpn/ccd/{{ minion }}:
+  file.managed:
+    - contents: "iroute {{ grains['cbr-string'] }}\n"
+    - user: root
+    - group: root
+    - mode: 644
+    - makedirs: True
+{% endfor %}
+
+openssl dhparam -out /etc/openvpn/dh1024.pem 1024:
+  cmd.run:
+    - creates: /etc/openvpn/dh1024.pem
+    - unless: file /etc/openvpn/dh1024.pem
+
+openvpn:
+  pkg:
+    - latest
+  service.running:
+    - enable: True
+    - watch:
+      - file: /etc/openvpn/server.conf

cluster/saltbase/salt/openvpn/server.conf

@@ -0,0 +1,123 @@
+# Which TCP/UDP port should OpenVPN listen on?
+# If you want to run multiple OpenVPN instances
+# on the same machine, use a different port
+# number for each one.  You will need to
+# open up this port on your firewall.
+port 1194
+
+# TCP or UDP server?
+proto udp
+
+# "dev tun" will create a routed IP tunnel,
+# "dev tap" will create an ethernet tunnel.
+# Use "dev tap0" if you are ethernet bridging
+# and have precreated a tap0 virtual interface
+# and bridged it with your ethernet interface.
+# If you want to control access policies
+# over the VPN, you must create firewall
+# rules for the the TUN/TAP interface.
+# On non-Windows systems, you can give
+# an explicit unit number, such as tun0.
+# On Windows, use "dev-node" for this.
+# On most systems, the VPN will not function
+# unless you partially or fully disable
+# the firewall for the TUN/TAP interface.
+dev tun
+
+# SSL/TLS root certificate (ca), certificate
+# (cert), and private key (key).  Each client
+# and the server must have their own cert and
+# key file.  The server and all clients will
+# use the same ca file.
+#
+# See the "easy-rsa" directory for a series
+# of scripts for generating RSA certificates
+# and private keys.  Remember to use
+# a unique Common Name for the server
+# and each of the client certificates.
+#
+# Any X509 key management system can be used.
+# OpenVPN can also use a PKCS #12 formatted key file
+# (see "pkcs12" directive in man page).
+ca /etc/openvpn/ca.crt
+cert /etc/openvpn/server.crt
+key /etc/openvpn/server.key  # This file should be kept secret
+
+# Diffie hellman parameters.
+# Generate your own with:
+#   openssl dhparam -out dh1024.pem 1024
+# Substitute 2048 for 1024 if you are using
+# 2048 bit keys.
+dh /etc/openvpn/dh1024.pem
+
+# Configure server mode and supply a VPN subnet
+# for OpenVPN to draw client addresses from.
+# The server will take 10.8.0.1 for itself,
+# the rest will be made available to clients.
+# Each client will be able to reach the server
+# on 10.8.0.1. Comment this line out if you are
+# ethernet bridging. See the man page for more info.
+server 10.8.0.0 255.255.255.0
+
+# Maintain a record of client <-> virtual IP address
+# associations in this file.  If OpenVPN goes down or
+# is restarted, reconnecting clients can be assigned
+# the same virtual IP address from the pool that was
+# previously assigned.
+ifconfig-pool-persist ipp.txt
+
+# To assign specific IP addresses to specific
+# clients or if a connecting client has a private
+# subnet behind it that should also have VPN access,
+# use the subdirectory "ccd" for client-specific
+# configuration files (see man page for more info).
+
+client-config-dir /etc/openvpn/ccd
+
+{% for minion in salt['mine.get']('roles:kubernetes-pool', 'grains.items', expr_form='grain').values() %}
+push "route {{ minion['cbr-string'] }}"
+route {{ minion['cbr-string'] }}
+{% endfor %}
+
+# Uncomment this directive to allow different
+# clients to be able to "see" each other.
+# By default, clients will only see the server.
+# To force clients to only see the server, you
+# will also need to appropriately firewall the
+# server's TUN/TAP interface.
+client-to-client
+
+# The keepalive directive causes ping-like
+# messages to be sent back and forth over
+# the link so that each side knows when
+# the other side has gone down.
+# Ping every 10 seconds, assume that remote
+# peer is down if no ping received during
+# a 120 second time period.
+keepalive 10 120
+
+# Enable compression on the VPN link.
+# If you enable it here, you must also
+# enable it in the client config file.
+comp-lzo
+
+# The persist options will try to avoid
+# accessing certain resources on restart
+# that may no longer be accessible because
+# of the privilege downgrade.
+persist-key
+persist-tun
+
+# Output a short status file showing
+# current connections, truncated
+# and rewritten every minute.
+status openvpn-status.log
+
+# Set the appropriate level of log
+# file verbosity.
+#
+# 0 is silent, except for fatal errors
+# 4 is reasonable for general usage
+# 5 and 6 can help to debug connection problems
+# 9 is extremely verbose
+verb 3

cluster/saltbase/salt/top.sls

@@ -10,6 +10,9 @@ base:
     - kube-proxy
     - cadvisor
     - nsinit
+{% if grains['cloud'] is defined and grains['cloud'] == 'azure' %}
+    - openvpn-client
+{% endif %}
 
   'roles:kubernetes-master':
     - match: grain
@@ -19,6 +22,9 @@ base:
     - controller-manager
     - scheduler
     - nginx
+{% if grains['cloud'] is defined and grains['cloud'] == 'azure' %}
+    - openvpn
+{% endif %}
 
   'roles:kubernetes-pool-vsphere':
     - match: grain