liquid_feedback_frontend

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Updated installation instructions for WebMCP 2.x
author jbe
date Mon Mar 23 23:17:43 2015 +0100 (2015-03-23)
parents 53b0139ed930
children a2922edacce0
rev   line source
bsw@1045 1 LiquidFeedback Installation Instructions
bsw@1045 2 ========================================
bsw@1045 3
bsw@1045 4 This document gives a short outline about the necessary steps to setup a
bsw@1045 5 LiquidFeedback system.
bsw@1045 6
bsw@1045 7
bsw@1045 8 1. Install necessary dependencies
bsw@1045 9 ---------------------------------
bsw@1045 10
bsw@1045 11 If you're using a Debian system, make sure that the following packages are
bsw@1045 12 installed:
bsw@1045 13
jbe@1156 14 * build-essential
jbe@1156 15 * lua5.2
jbe@1156 16 * liblua5.2-dev
bsw@1045 17 * postgresql
bsw@1045 18 * libpq-dev
jbe@1156 19 * lighttpd (only for WebMCP 1.2.x support)
bsw@1045 20 * imagemagick
bsw@1045 21 * exim4
jbe@1046 22 * markdown2 (install with Python's pip)
bsw@1045 23
bsw@1045 24 If you're using any other Linux distribution or BSD system, install the
bsw@1045 25 necessary software components accordingly.
bsw@1045 26
bsw@1045 27
bsw@1045 28 2. Ensure that the user account of your webserver has access to the database
bsw@1045 29 ----------------------------------------------------------------------------
bsw@1045 30
jbe@1156 31 The useraccount of the webserver (usually `www-data`) or the Moonbridge server
jbe@1156 32 process needs to have access to your PostgreSQL installation. This is done by
jbe@1156 33 executing PostgreSQL's shell command `createuser` as database superuser
jbe@1156 34 (usually `pgsql`, or `postgres` for Debian installations):
bsw@1045 35
bsw@1045 36 su - postgres
bsw@1045 37 createuser
bsw@1045 38
bsw@1045 39 Enter name of role to add: www-data
bsw@1045 40 Shall the new role be a superuser? (y/n) n
bsw@1045 41 Shall the new role be allowed to create databases? (y/n) y
bsw@1045 42 Shall the new role be allowed to create more new roles? (y/n) n
bsw@1045 43
bsw@1045 44 exit
bsw@1045 45
bsw@1045 46
bsw@1045 47 3. Install and configure LiquidFeedback-Core
bsw@1045 48 --------------------------------------------
bsw@1045 49
bsw@1045 50 We recommend to create the database with the same user as your webserver
bsw@1045 51 (usually `www-data`) to avoid having to setup database privileges.
bsw@1045 52
bsw@1045 53 The example below installs the database as `www-data` and stores the two
bsw@1045 54 executables `lf_update` and `lf_update_issue_order` in the directory
bsw@1045 55 `/opt/liquid_feedback_core/`:
bsw@1045 56
bsw@1045 57 # Download and unpack LiquidFeedback-Core
bsw@1045 58 # from http://www.public-software-group.org/pub/projects/liquid_feedback/backend/
bsw@1045 59 make
bsw@1045 60 mkdir /opt/liquid_feedback_core
bsw@1045 61 cp core.sql lf_update lf_update_issue_order /opt/liquid_feedback_core
bsw@1045 62 su - www-data
bsw@1045 63 cd /opt/liquid_feedback_core
bsw@1045 64 createdb liquid_feedback
bsw@1045 65 createlang plpgsql liquid_feedback # command may be omitted, depending on PostgreSQL version
bsw@1045 66 psql -v ON_ERROR_STOP=1 -f core.sql liquid_feedback
bsw@1045 67
bsw@1045 68 A simple configuration may look as follows:
bsw@1045 69
bsw@1045 70 psql liquid_feedback
bsw@1045 71
bsw@1045 72 INSERT INTO system_setting (member_ttl) VALUES ('1 year');
bsw@1045 73 INSERT INTO contingent (polling, time_frame, text_entry_limit, initiative_limit) VALUES (false, '1 hour', 20, 6);
bsw@1045 74 INSERT INTO contingent (polling, time_frame, text_entry_limit, initiative_limit) VALUES (false, '1 day', 80, 12);
bsw@1045 75 INSERT INTO contingent (polling, time_frame, text_entry_limit, initiative_limit) VALUES (true, '1 hour', 200, 60);
bsw@1045 76 INSERT INTO contingent (polling, time_frame, text_entry_limit, initiative_limit) VALUES (true, '1 day', 800, 120);
bsw@1045 77 INSERT INTO policy (index, name, admission_time, discussion_time, verification_time, voting_time, issue_quorum_num, issue_quorum_den, initiative_quorum_num, initiative_quorum_den) VALUES (1, 'Default policy', '8 days', '15 days', '8 days', '15 days', 10, 100, 10, 100);
bsw@1045 78 INSERT INTO unit (name) VALUES ('Our organization');
bsw@1045 79 INSERT INTO area (unit_id, name) VALUES (1, 'Default area');
bsw@1045 80 INSERT INTO allowed_policy (area_id, policy_id, default_policy) VALUES (1, 1, TRUE);
bsw@1045 81
bsw@1045 82 If you want to create an admin user with an empty password (CAUTION!), then execute the following SQL statement:
bsw@1045 83
bsw@1045 84 INSERT INTO member (login, name, admin, password) VALUES ('admin', 'Administrator', TRUE, '$1$/EMPTY/$NEWt7XJg2efKwPm4vectc1');
bsw@1045 85
bsw@1045 86 Exit the `psql` interface by typing:
bsw@1045 87
bsw@1045 88 \q
bsw@1045 89
bsw@1045 90 And don't forget to quit the `www-data` shell:
bsw@1045 91
bsw@1045 92 exit
bsw@1045 93
bsw@1045 94
jbe@1156 95 4. Install Moonbridge (only for WebMCP 2.x)
jbe@1156 96 -------------------------------------------
jbe@1156 97
jbe@1156 98 # Download and unpack Moonbridge
jbe@1156 99 # from http://www.public-software-group.org/pub/projects/moonbridge/
jbe@1156 100 pmake MOONBR_LUA_PATH=/opt/moonbridge/?.lua
jbe@1156 101 mkdir /opt/moonbridge
jbe@1156 102 cp moonbridge /opt/moonbridge/
jbe@1156 103 cp moonbridge_http.lua /opt/moonbridge/
jbe@1156 104
jbe@1156 105
jbe@1156 106 5. Install WebMCP
bsw@1045 107 -----------------
bsw@1045 108
jbe@1156 109 Note: Using Debian, it may be necessary to append `-I /usr/include/lua5.2` at
bsw@1045 110 the end of the CFLAGS line in `Makefile.options` of the WebMCP source
bsw@1045 111 distibution:
bsw@1045 112
bsw@1045 113 # Download and unpack WebMCP
bsw@1045 114 # from http://www.public-software-group.org/pub/projects/webmcp/
jbe@1156 115 vi Makefile.options # Debian requires -I /usr/include/lua5.2 at end of CFLAGS line
bsw@1045 116 make
bsw@1045 117 mkdir /opt/webmcp
bsw@1045 118 cp -RL framework/* /opt/webmcp/
bsw@1045 119
bsw@1045 120
jbe@1156 121 6. Install the LiquidFeedback-Frontend
bsw@1045 122 --------------------------------------
bsw@1045 123
bsw@1045 124 Unpack source tree into appropriate directory, e.g. `/opt/liquid_feedback_frontend`:
bsw@1045 125
bsw@1045 126 # Download LiquidFeedback-Frontend
bsw@1045 127 # from http://www.public-software-group.org/pub/projects/liquid_feedback/frontend/
bsw@1045 128 mv liquid_feedback_frontend-vX.X.X /opt/liquid_feedback_frontend
bsw@1045 129
bsw@1045 130 Make `tmp/` directory of LiquidFeedback-Frontend writable for webserver:
bsw@1045 131
bsw@1045 132 chown www-data /opt/liquid_feedback_frontend/tmp
bsw@1045 133
jbe@1156 134 Compile binary for fast delivery of member images (only necessary for WebMCP 1.2.x):
bsw@1045 135
bsw@1045 136 cd /opt/liquid_feedback_frontend/fastpath
bsw@1045 137 vi getpic.c # check and modify #define commands as necessary
bsw@1045 138 make
bsw@1045 139
bsw@1045 140
jbe@1156 141 7. Configure mail system
bsw@1045 142 ------------------------
bsw@1045 143
bsw@1045 144 It may be necessary to configure your server's mail system, e.g. running
bsw@1045 145 `dpkg-reconfigure exim4-config` on a Debian system.
bsw@1045 146
bsw@1045 147
jbe@1156 148 8. Configure the Webserver for LiquidFeedback (only for WebMCP 1.2.x)
jbe@1156 149 ---------------------------------------------------------------------
bsw@1045 150
bsw@1045 151 A sample configuration for `lighttpd` is given below (assuming `mod_alias` has
bsw@1045 152 been included elsewhere):
bsw@1045 153
bsw@1045 154 server.modules += ("mod_cgi", "mod_rewrite", "mod_redirect", "mod_setenv")
bsw@1045 155
bsw@1045 156 # Enable CGI-Execution of *.lua files through lua binary
bsw@1045 157 cgi.assign += ( ".lua" => "/usr/bin/lua5.1" )
bsw@1045 158
bsw@1045 159 alias.url += ( "/lf/fastpath/" => "/opt/liquid_feedback_frontend/fastpath/",
bsw@1045 160 "/lf/static" => "/opt/liquid_feedback_frontend/static",
bsw@1045 161 "/lf" => "/opt/webmcp/cgi-bin" )
bsw@1045 162
bsw@1045 163 # Configure environment for demo application
bsw@1045 164 $HTTP["url"] =~ "^/lf" {
bsw@1045 165 setenv.add-environment += (
bsw@1045 166 "LANG" => "en_US.UTF-8",
bsw@1045 167 "WEBMCP_APP_BASEPATH" => "/opt/liquid_feedback_frontend/",
bsw@1045 168 "WEBMCP_CONFIG_NAME" => "myconfig")
bsw@1045 169 }
bsw@1045 170
bsw@1045 171 # URL beautification
bsw@1045 172 url.rewrite-once += (
bsw@1045 173 # do not rewrite static URLs
bsw@1045 174 "^/lf/fastpath/(.*)$" => "/lf/fastpath/$1",
bsw@1045 175 "^/lf/static/(.*)$" => "/lf/static/$1",
bsw@1045 176
bsw@1045 177 # dynamic URLs
bsw@1045 178 "^/lf/([^\?]*)(\?(.*))?$" => "/lf/webmcp-wrapper.lua?_webmcp_path=$1&$3",
bsw@1045 179
bsw@1045 180 )
bsw@1045 181
bsw@1045 182 $HTTP["url"] =~ "^/lf/fastpath/" {
bsw@1045 183 cgi.assign = ( "" => "" )
bsw@1045 184 setenv.add-response-header = ( "Cache-Control" => "private; max-age=86400" )
bsw@1045 185 }
bsw@1045 186
bsw@1045 187 If you're using Debian, you may want to create a file with the name
bsw@1045 188 `/etc/lighttpd/conf-available/60-liquidfeedback.conf` and create a softlink in
bsw@1045 189 `/etc/lighttpd/conf-enabled/`.
bsw@1045 190
bsw@1045 191
jbe@1156 192 9. Configure the LiquidFeedback-Frontend
jbe@1156 193 ----------------------------------------
bsw@1045 194
bsw@1045 195 cd /opt/liquid_feedback_frontend/config
bsw@1045 196 cp example.lua myconfig.lua
bsw@1045 197 # edit myconfig.lua according to your needs
bsw@1045 198
bsw@1045 199 Use the following option in your configuration file to enable fast image
jbe@1156 200 loading (only for WebMCP 1.2.x):
bsw@1045 201
bsw@1045 202 config.fastpath_url_func = function(member_id, image_type)
bsw@1045 203 return request.get_absolute_baseurl() .. "fastpath/getpic?" .. tostring(member_id) .. "+" .. tostring(image_type)
bsw@1045 204 end
bsw@1045 205
bsw@1045 206
jbe@1156 207 10. Setup regular execution of `lf_update` and related commands
jbe@1156 208 ---------------------------------------------------------------
bsw@1045 209
jbe@1051 210 The executables `lf_update`, `lf_update_issue_order`, and
jbe@1051 211 `lf_update_suggestion_order` must be executed regularly. This may be achieved
jbe@1051 212 by creating a file named `/opt/liquid_feedback_core/lf_updated` with the
jbe@1051 213 following contents:
bsw@1045 214
bsw@1045 215 #!/bin/sh
bsw@1045 216
bsw@1045 217 PIDFILE="/var/run/lf_updated.pid"
bsw@1045 218 PID=$$
bsw@1045 219
bsw@1045 220 if [ -f "${PIDFILE}" ] && kill -CONT $( cat "${PIDFILE}" ); then
bsw@1045 221 echo "lf_updated is already running."
bsw@1045 222 exit 1
bsw@1045 223 fi
bsw@1045 224
bsw@1045 225 echo "${PID}" > "${PIDFILE}"
bsw@1045 226
bsw@1045 227 while true; do
bsw@1045 228 su - www-data -c 'nice /opt/liquid_feedback_core/lf_update dbname=liquid_feedback 2>&1 | logger -t "lf_updated"'
jbe@1051 229 su - www-data -c 'nice /opt/liquid_feedback_core/lf_update_issue_order dbname=liquid_feedback 2>&1 | logger -t "lf_updated"'
bsw@1045 230 su - www-data -c 'nice /opt/liquid_feedback_core/lf_update_suggestion_order dbname=liquid_feedback 2>&1 | logger -t "lf_updated"'
bsw@1045 231 sleep 5
bsw@1045 232 done
bsw@1045 233
bsw@1045 234 This file must be marked as executable:
bsw@1045 235
bsw@1045 236 chmod +x /opt/liquid_feedback_core/lf_updated
bsw@1045 237
bsw@1045 238 And this file should be started automatically at system boot.
bsw@1045 239
bsw@1045 240
jbe@1156 241 11. Setup notification loop in background (only for WebMCP 1.2.x)
jbe@1156 242 -----------------------------------------------------------------
bsw@1045 243
bsw@1045 244 In addition to regular execution of `lf_update` and
bsw@1045 245 `lf_update_suggestion_order`, the following commands should be executed in
bsw@1045 246 background:
bsw@1045 247
bsw@1045 248 su - www-data
bsw@1045 249 cd /opt/liquid_feedback_frontend/
bsw@1045 250 echo "Event:send_notifications_loop()" | ../webmcp/bin/webmcp_shell myconfig
bsw@1045 251
bsw@1045 252
jbe@1156 253 12. Start the sytem
bsw@1045 254 -------------------
bsw@1045 255
bsw@1045 256 After `lf_update` has been executed at least once, and the webserver has been
bsw@1045 257 restarted (using the configuration above), you should be able to access your
bsw@1045 258 LiquidFeedback system.
bsw@1045 259
jbe@1156 260 If you use WebMCP 2.x, the server is started by calling:
bsw@1045 261
jbe@1156 262 /opt/moonbridge/moonbridge /opt/webmcp/bin/mcp.lua /opt/webmcp/ /opt/liquid_feedback_frontend/ main myconfig
jbe@1156 263

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