Add a HTTPS-->HTTP reverse proxy in front of redfish-emulator

This patch introduces a reverse proxy that terminates an HTTPS
connection and forwards it to the redfish emulator behind that
is running HTTP. Also the reverse proxy presents a self-signed
certificate.

Closes: #136
Relates-To: #136

Change-Id: If6ee705247ae8866d2674bff1ff034277f9c9177

roles/airship-libvirt-gate/defaults/main.yaml

@@ -19,6 +19,10 @@ airship_gate_ipam:
     bridge_ip: "10.23.24.1"
 
 airship_gate_redfish:
+  hostname: "redfish-emulator"
+  username: "username"
+  password: "password"
+  secure_port: 443
   port: 8000
   bind_address: "127.0.0.1"
 

roles/airship-libvirt-gate/tasks/build-infra.yaml

@@ -94,6 +94,19 @@
         - network: "{{ airship_gate_names.nat_network }}"
         - network: "{{ airship_gate_names.provision_network }}"
 
+- name: install apache2 reverse proxy
+  include_role:
+    name: reverse-proxy
+  vars:
+    reverse_proxy_action: "install"
+    reverse_proxy_hostname: "{{ airship_gate_redfish.hostname }}"
+    reverse_proxy_username: "{{ airship_gate_redfish.username }}"
+    reverse_proxy_password: "{{ airship_gate_redfish.password }}"
+    reverse_proxy_frontend_ip: "{{ airship_gate_redfish.bind_address }}"
+    reverse_proxy_frontend_port: "{{ airship_gate_redfish.secure_port }}"
+    reverse_proxy_backend_ip: "{{ airship_gate_redfish.bind_address }}"
+    reverse_proxy_backend_port: "{{ airship_gate_redfish.port }}"
+
 - name: install and start redfish emulator
   include_role:
     name: redfish-emulator

roles/airship-libvirt-gate/tests/main.yaml

@@ -9,9 +9,12 @@
     gate_flavor: small
     gate_action: build-infra
 
-- name: query redfish to make sure it has runnig domains
+- name: query redfish to make sure it has running domains using HTTPS
   uri:
-    url: http://{{ airship_gate_redfish.bind_address }}:{{ airship_gate_redfish.port }}/redfish/v1/Systems?format=json
+    url: "https://{{ airship_gate_redfish.bind_address }}:{{ airship_gate_redfish.secure_port }}/redfish/v1/Systems?format=json"
+    url_username: "{{ airship_gate_redfish.username }}"
+    url_password: "{{ airship_gate_redfish.password }}"
+    validate_certs: false
     method: GET
     return_content: yes
   register: redfish_response
@@ -22,7 +25,10 @@
 
 - name: save ids to list
   uri:
-    url: "http://{{ airship_gate_redfish.bind_address }}:{{ airship_gate_redfish.port }}{{ item.value }}?format=json"
+    url: "https://{{ airship_gate_redfish.bind_address }}:{{ airship_gate_redfish.secure_port }}{{ item.value }}?format=json"
+    url_username: "{{ airship_gate_redfish.username }}"
+    url_password: "{{ airship_gate_redfish.password }}"
+    validate_certs: false
     method: GET
     return_content: yes
   with_dict: "{{ redfish_response.json.Members }}"

roles/airship-libvirt-gate/tests/vars.yaml

@@ -1,4 +1,8 @@
 airship_gate_redfish:
+  hostname: "redfish-emulator"
+  username: "username"
+  password: "password"
+  secure_port: 443
   port: 8000
   bind_address: "127.0.0.1"
 

roles/reverse-proxy/defaults/main.yaml

@@ -0,0 +1,9 @@
+reverse_proxy_action: install
+
+reverse_proxy_hostname: "redfish-emulator"
+reverse_proxy_username: "username"
+reverse_proxy_password: "password"
+reverse_proxy_frontend_ip: "127.0.0.1"
+reverse_proxy_frontend_port: 443
+reverse_proxy_backend_ip: "127.0.0.1"
+reverse_proxy_backend_port: 8000

roles/reverse-proxy/tasks/dependencies.yaml

@@ -0,0 +1,24 @@
+- block:
+  - name: Ensuring python3-pip and support packages are present
+    when: ansible_distribution == 'CentOS' or ansible_distribution == 'Red Hat Enterprise Linux'
+    fail:
+      msg: "CentoOS or RHEL is not currently supported"
+
+  - name: Ensuring python3-pip and support packages are present
+    become: true
+    when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'
+    apt:
+      name:
+        - python3-pip
+        - python3-libvirt
+        - python-libvirt
+      state: present
+
+  - name: Install required pip packages
+    pip:
+      name: "{{ item }}"
+      executable: pip3
+    with_items:
+      - pyOpenSSL
+      - passlib
+    become: true

roles/reverse-proxy/tasks/install.yaml

@@ -0,0 +1,103 @@
+- name: Install dependencies
+  include_tasks: dependencies.yaml
+
+- name: Install apache2 package
+  apt:
+    name: apache2
+    state: present
+  become: true
+
+- name: Disable default virtualhost
+  file:
+    path: /etc/apache2/sites-enabled/000-default.conf
+    state: absent
+  become: true
+
+- name: Enable proxy related modules
+  apache2_module:
+    name: "{{ item }}"
+    state: present
+  with_items:
+    - headers
+    - proxy
+    - proxy_http
+    - rewrite
+    - ssl
+  become: true
+
+- name: Generate private key for "{{ reverse_proxy_hostname }}"
+  openssl_privatekey:
+    path: /etc/ssl/private/{{ reverse_proxy_hostname }}-privkey.pem
+  become: true
+
+- name: Generate CSR for "{{ reverse_proxy_hostname }}"
+  openssl_csr:
+    path: /tmp/{{ reverse_proxy_hostname }}.csr
+    privatekey_path: /etc/ssl/private/{{ reverse_proxy_hostname }}-privkey.pem
+    common_name: "{{ reverse_proxy_hostname }}"
+    subject_alt_name: "IP:{{ reverse_proxy_frontend_ip }}"
+  become: true
+
+- name: Generate the self signed certificate for "{{ reverse_proxy_hostname }}"
+  openssl_certificate:
+    path: /etc/ssl/certs/{{ reverse_proxy_hostname }}-cert.pem
+    privatekey_path: /etc/ssl/private/{{ reverse_proxy_hostname }}-privkey.pem
+    csr_path: /tmp/{{ reverse_proxy_hostname }}.csr
+    provider: selfsigned
+  become: true
+
+# TODO: Using dhparam can be good to have for HTTPS virtual host
+# But it takes too much time to generate for each run.
+# It can be enabled if necessary at a later point.
+#- name: Generate Diffie-Hellman parameters with the default size (4096 bits)
+#  openssl_dhparam:
+#    path: /etc/ssl/certs/{{ reverse_proxy_hostname }}-dhparams.pem
+
+- name: Remove older htpasswd file
+  file:
+    path: /etc/apache2/{{ reverse_proxy_hostname }}-passwd
+    state: absent
+  become: true
+
+- name: Create username and password for basic authentication
+  htpasswd:
+    path: /etc/apache2/{{ reverse_proxy_hostname }}-passwd
+    name: "{{ reverse_proxy_username }}"
+    password: "{{ reverse_proxy_password }}"
+  become: true
+
+- name: Add default virtual host
+  template:
+    src: etc/apache2/sites-available/000-default.conf.j2
+    dest: /etc/apache2/sites-available/000-default.conf
+  become: true
+
+- name: Add ssl virtual host
+  template:
+    src: etc/apache2/sites-available/default-ssl.conf.j2
+    dest: /etc/apache2/sites-available/default-ssl.conf
+  become: true
+
+- name: Add ssl configuration
+  template:
+    src: etc/apache2/conf-available/ssl-params.conf.j2
+    dest: /etc/apache2/conf-available/ssl-params.conf
+  become: true
+
+- name: Enable default virtual host
+  command: a2ensite 000-default
+  become: true
+
+- name: Enable ssl virtual host
+  command: a2ensite default-ssl
+  become: true
+
+- name: Enable ssl configuration
+  command: a2enconf ssl-params
+  become: true
+
+- name: Reload apache2 service
+  service:
+    name: apache2
+    state: reloaded
+  become: true

roles/reverse-proxy/tasks/main.yaml

@@ -0,0 +1 @@
+- include_tasks: "{{ reverse_proxy_action }}.yaml"

roles/reverse-proxy/templates/etc/apache2/conf-available/ssl-params.conf.j2

@@ -0,0 +1,17 @@
+SSLCipherSuite EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH
+SSLProtocol All -SSLv2 -SSLv3 -TLSv1 -TLSv1.1
+
+SSLHonorCipherOrder On
+# Disable preloading HSTS for now.  You can use the commented out header line that includes
+# the "preload" directive if you understand the implications.
+#Header always set Strict-Transport-Security "max-age=63072000; includeSubdomains; preload"
+Header always set Strict-Transport-Security "max-age=63072000; includeSubdomains"
+Header always set X-Frame-Options DENY
+Header always set X-Content-Type-Options nosniff
+# Requires Apache >= 2.4
+SSLCompression off
+SSLSessionTickets Off
+SSLUseStapling on
+SSLStaplingCache "shmcb:logs/stapling-cache(150000)"
+
+#SSLOpenSSLConfCmd DHParameters "/etc/ssl/certs/{{ reverse_proxy_hostname }}-dhparam.pem"

roles/reverse-proxy/templates/etc/apache2/sites-available/000-default.conf.j2

@@ -0,0 +1,3 @@
+<VirtualHost *:80>
+    Redirect permanent "/" "https://{{ reverse_proxy_frontend_ip }}:{{ reverse_proxy_frontend_port }}/"
+</VirtualHost>

roles/reverse-proxy/templates/etc/apache2/sites-available/default-ssl.conf.j2

@@ -0,0 +1,148 @@
+<IfModule mod_ssl.c>
+	<VirtualHost {{ reverse_proxy_frontend_ip }}:{{ reverse_proxy_frontend_port }}>
+		ServerAdmin webmaster@localhost
+                ServerName {{ reverse_proxy_hostname }}
+
+		DocumentRoot /var/www/html
+
+		# Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
+		# error, crit, alert, emerg.
+		# It is also possible to configure the loglevel for particular
+		# modules, e.g.
+		#LogLevel info ssl:warn
+
+		ErrorLog ${APACHE_LOG_DIR}/error.log
+		CustomLog ${APACHE_LOG_DIR}/access.log combined
+
+		# For most configuration files from conf-available/, which are
+		# enabled or disabled at a global level, it is possible to
+		# include a line for only one particular virtual host. For example the
+		# following line enables the CGI configuration for this host only
+		# after it has been globally disabled with "a2disconf".
+		#Include conf-available/serve-cgi-bin.conf
+
+		#   SSL Engine Switch:
+		#   Enable/Disable SSL for this virtual host.
+		SSLEngine on
+
+		#   A self-signed (snakeoil) certificate can be created by installing
+		#   the ssl-cert package. See
+		#   /usr/share/doc/apache2/README.Debian.gz for more info.
+		#   If both key and certificate are stored in the same file, only the
+		#   SSLCertificateFile directive is needed.
+		SSLCertificateFile	/etc/ssl/certs/{{ reverse_proxy_hostname }}-cert.pem
+		SSLCertificateKeyFile /etc/ssl/private/{{ reverse_proxy_hostname }}-privkey.pem
+
+		#   Server Certificate Chain:
+		#   Point SSLCertificateChainFile at a file containing the
+		#   concatenation of PEM encoded CA certificates which form the
+		#   certificate chain for the server certificate. Alternatively
+		#   the referenced file can be the same as SSLCertificateFile
+		#   when the CA certificates are directly appended to the server
+		#   certificate for convinience.
+		#SSLCertificateChainFile /etc/apache2/ssl.crt/server-ca.crt
+
+		#   Certificate Authority (CA):
+		#   Set the CA certificate verification path where to find CA
+		#   certificates for client authentication or alternatively one
+		#   huge file containing all of them (file must be PEM encoded)
+		#   Note: Inside SSLCACertificatePath you need hash symlinks
+		#		 to point to the certificate files. Use the provided
+		#		 Makefile to update the hash symlinks after changes.
+		#SSLCACertificatePath /etc/ssl/certs/
+		#SSLCACertificateFile /etc/apache2/ssl.crt/ca-bundle.crt
+
+		#   Certificate Revocation Lists (CRL):
+		#   Set the CA revocation path where to find CA CRLs for client
+		#   authentication or alternatively one huge file containing all
+		#   of them (file must be PEM encoded)
+		#   Note: Inside SSLCARevocationPath you need hash symlinks
+		#		 to point to the certificate files. Use the provided
+		#		 Makefile to update the hash symlinks after changes.
+		#SSLCARevocationPath /etc/apache2/ssl.crl/
+		#SSLCARevocationFile /etc/apache2/ssl.crl/ca-bundle.crl
+
+		#   Client Authentication (Type):
+		#   Client certificate verification type and depth.  Types are
+		#   none, optional, require and optional_no_ca.  Depth is a
+		#   number which specifies how deeply to verify the certificate
+		#   issuer chain before deciding the certificate is not valid.
+		#SSLVerifyClient require
+		#SSLVerifyDepth  10
+
+		#   SSL Engine Options:
+		#   Set various options for the SSL engine.
+		#   o FakeBasicAuth:
+		#	 Translate the client X.509 into a Basic Authorisation.  This means that
+		#	 the standard Auth/DBMAuth methods can be used for access control.  The
+		#	 user name is the `one line' version of the client's X.509 certificate.
+		#	 Note that no password is obtained from the user. Every entry in the user
+		#	 file needs this password: `xxj31ZMTZzkVA'.
+		#   o ExportCertData:
+		#	 This exports two additional environment variables: SSL_CLIENT_CERT and
+		#	 SSL_SERVER_CERT. These contain the PEM-encoded certificates of the
+		#	 server (always existing) and the client (only existing when client
+		#	 authentication is used). This can be used to import the certificates
+		#	 into CGI scripts.
+		#   o StdEnvVars:
+		#	 This exports the standard SSL/TLS related `SSL_*' environment variables.
+		#	 Per default this exportation is switched off for performance reasons,
+		#	 because the extraction step is an expensive operation and is usually
+		#	 useless for serving static content. So one usually enables the
+		#	 exportation for CGI and SSI requests only.
+		#   o OptRenegotiate:
+		#	 This enables optimized SSL connection renegotiation handling when SSL
+		#	 directives are used in per-directory context.
+		#SSLOptions +FakeBasicAuth +ExportCertData +StrictRequire
+		<FilesMatch "\.(cgi|shtml|phtml|php)$">
+				SSLOptions +StdEnvVars
+		</FilesMatch>
+		<Directory /usr/lib/cgi-bin>
+				SSLOptions +StdEnvVars
+		</Directory>
+
+		#   SSL Protocol Adjustments:
+		#   The safe and default but still SSL/TLS standard compliant shutdown
+		#   approach is that mod_ssl sends the close notify alert but doesn't wait for
+		#   the close notify alert from client. When you need a different shutdown
+		#   approach you can use one of the following variables:
+		#   o ssl-unclean-shutdown:
+		#	 This forces an unclean shutdown when the connection is closed, i.e. no
+		#	 SSL close notify alert is send or allowed to received.  This violates
+		#	 the SSL/TLS standard but is needed for some brain-dead browsers. Use
+		#	 this when you receive I/O errors because of the standard approach where
+		#	 mod_ssl sends the close notify alert.
+		#   o ssl-accurate-shutdown:
+		#	 This forces an accurate shutdown when the connection is closed, i.e. a
+		#	 SSL close notify alert is send and mod_ssl waits for the close notify
+		#	 alert of the client. This is 100% SSL/TLS standard compliant, but in
+		#	 practice often causes hanging connections with brain-dead browsers. Use
+		#	 this only for browsers where you know that their SSL implementation
+		#	 works correctly.
+		#   Notice: Most problems of broken clients are also related to the HTTP
+		#   keep-alive facility, so you usually additionally want to disable
+		#   keep-alive for those clients, too. Use variable "nokeepalive" for this.
+		#   Similarly, one has to force some clients to use HTTP/1.0 to workaround
+		#   their broken HTTP/1.1 implementation. Use variables "downgrade-1.0" and
+		#   "force-response-1.0" for this.
+		# BrowserMatch "MSIE [2-6]" \
+		#		nokeepalive ssl-unclean-shutdown \
+		#		downgrade-1.0 force-response-1.0
+
+		<Proxy *>
+			Order deny,allow
+			Allow from all
+			Authtype Basic
+			Authname "Password based authentication"
+			AuthUserFile /etc/apache2/{{ reverse_proxy_hostname }}-passwd
+			Require valid-user
+		</Proxy>
+
+		ProxyPreserveHost On
+
+		ProxyPass / http://{{ reverse_proxy_backend_ip }}:{{ reverse_proxy_backend_port }}/
+		ProxyPassReverse / http://{{ reverse_proxy_backend_ip }}:{{ reverse_proxy_backend_port }}/
+	</VirtualHost>
+</IfModule>
+
+# vim: syntax=apache ts=4 sw=4 sts=4 sr noet