build/rails-package-scripts/postinst.sh

   1 #!/bin/sh
   2 # Copyright (C) The Arvados Authors. All rights reserved.
   3 #
   4 # SPDX-License-Identifier: AGPL-3.0
   5
   6 # This code runs after package variable definitions and step2.sh.
   7
   8 set -e
   9
  10 DATABASE_READY=1
  11 APPLICATION_READY=1
  12
  13 if [ -s "$HOME/.rvm/scripts/rvm" ] || [ -s "/usr/local/rvm/scripts/rvm" ]; then
  14     COMMAND_PREFIX="/usr/local/rvm/bin/rvm-exec default"
  15 else
  16     COMMAND_PREFIX=
  17 fi
  18
  19 report_not_ready() {
  20     local ready_flag="$1"; shift
  21     local config_file="$1"; shift
  22     if [ "1" != "$ready_flag" ]; then cat >&2 <<EOF
  23
  24 PLEASE NOTE:
  25
  26 The $PACKAGE_NAME package was not configured completely because
  27 $config_file needs some tweaking.
  28 Please refer to the documentation at
  29 <$DOC_URL> for more details.
  30
  31 When $(basename "$config_file") has been modified,
  32 reconfigure or reinstall this package.
  33
  34 EOF
  35     fi
  36 }
  37
  38 report_web_service_warning() {
  39     local warning="$1"; shift
  40     cat >&2 <<EOF
  41
  42 WARNING: $warning.
  43
  44 To override, set the WEB_SERVICE environment variable to the name of the service
  45 hosting the Rails server.
  46
  47 For Debian-based systems, then reconfigure this package with dpkg-reconfigure.
  48
  49 For RPM-based systems, then reinstall this package.
  50
  51 EOF
  52 }
  53
  54 run_and_report() {
  55     # Usage: run_and_report ACTION_MSG CMD
  56     # This is the usual wrapper that prints ACTION_MSG, runs CMD, then writes
  57     # a message about whether CMD succeeded or failed.  Returns the exit code
  58     # of CMD.
  59     local action_message="$1"; shift
  60     local retcode=0
  61     echo -n "$action_message..."
  62     if "$@"; then
  63         echo " done."
  64     else
  65         retcode=$?
  66         echo " failed."
  67     fi
  68     return $retcode
  69 }
  70
  71 setup_confdirs() {
  72     for confdir in "$@"; do
  73         if [ ! -d "$confdir" ]; then
  74             install -d -g "$WWW_OWNER" -m 0750 "$confdir"
  75         fi
  76     done
  77 }
  78
  79 setup_conffile() {
  80     # Usage: setup_conffile CONFFILE_PATH [SOURCE_PATH]
  81     # Both paths are relative to RELEASE_CONFIG_PATH.
  82     # This function will try to safely ensure that a symbolic link for
  83     # the configuration file points from RELEASE_CONFIG_PATH to CONFIG_PATH.
  84     # If SOURCE_PATH is given, this function will try to install that file as
  85     # the configuration file in CONFIG_PATH, and return 1 if the file in
  86     # CONFIG_PATH is unmodified from the source.
  87     local conffile_relpath="$1"; shift
  88     local conffile_source="$1"
  89     local release_conffile="$RELEASE_CONFIG_PATH/$conffile_relpath"
  90     local etc_conffile="$CONFIG_PATH/$(basename "$conffile_relpath")"
  91
  92     # Note that -h can return true and -e will return false simultaneously
  93     # when the target is a dangling symlink.  We're okay with that outcome,
  94     # so check -h first.
  95     if [ ! -h "$release_conffile" ]; then
  96         if [ ! -e "$release_conffile" ]; then
  97             ln -s "$etc_conffile" "$release_conffile"
  98         # If there's a config file in /var/www identical to the one in /etc,
  99         # overwrite it with a symlink after porting its permissions.
 100         elif cmp --quiet "$release_conffile" "$etc_conffile"; then
 101             local ownership="$(stat -c "%u:%g" "$release_conffile")"
 102             local owning_group="${ownership#*:}"
 103             if [ 0 != "$owning_group" ]; then
 104                 chgrp "$owning_group" "$CONFIG_PATH" /etc/arvados
 105             fi
 106             chown "$ownership" "$etc_conffile"
 107             chmod --reference="$release_conffile" "$etc_conffile"
 108             ln --force -s "$etc_conffile" "$release_conffile"
 109         fi
 110     fi
 111
 112     if [ -n "$conffile_source" ]; then
 113         if [ ! -e "$etc_conffile" ]; then
 114             install -g "$WWW_OWNER" -m 0640 \
 115                     "$RELEASE_CONFIG_PATH/$conffile_source" "$etc_conffile"
 116             return 1
 117         # Even if $etc_conffile already existed, it might be unmodified from
 118         # the source.  This is especially likely when a user installs, updates
 119         # database.yml, then reconfigures before they update application.yml.
 120         # Use cmp to be sure whether $etc_conffile is modified.
 121         elif cmp --quiet "$RELEASE_CONFIG_PATH/$conffile_source" "$etc_conffile"; then
 122             return 1
 123         fi
 124     fi
 125 }
 126
 127 prepare_database() {
 128   DB_MIGRATE_STATUS=`$COMMAND_PREFIX bin/rake db:migrate:status 2>&1 || true`
 129   if echo "$DB_MIGRATE_STATUS" | grep -qF 'Schema migrations table does not exist yet.'; then
 130       # The database exists, but the migrations table doesn't.
 131       run_and_report "Setting up database" $COMMAND_PREFIX bin/rake \
 132                      "$RAILSPKG_DATABASE_LOAD_TASK" db:seed
 133   elif echo "$DB_MIGRATE_STATUS" | grep -q '^database: '; then
 134       run_and_report "Running db:migrate" \
 135                      $COMMAND_PREFIX bin/rake db:migrate
 136   elif echo "$DB_MIGRATE_STATUS" | grep -q 'database .* does not exist'; then
 137       if ! run_and_report "Running db:setup" \
 138            $COMMAND_PREFIX bin/rake db:setup 2>/dev/null; then
 139           echo "Warning: unable to set up database." >&2
 140           DATABASE_READY=0
 141       fi
 142   else
 143     echo "Warning: Database is not ready to set up. Skipping database setup." >&2
 144     DATABASE_READY=0
 145   fi
 146 }
 147
 148 configure_version() {
 149   if [ -n "$WEB_SERVICE" ]; then
 150       SERVICE_MANAGER=$(guess_service_manager)
 151   elif WEB_SERVICE=$(list_services_systemd | grep -E '^(nginx|httpd)'); then
 152       SERVICE_MANAGER=systemd
 153   elif WEB_SERVICE=$(list_services_service \
 154                          | grep -Eo '\b(nginx|httpd)[^[:space:]]*'); then
 155       SERVICE_MANAGER=service
 156   fi
 157
 158   if [ -z "$WEB_SERVICE" ]; then
 159     report_web_service_warning "Web service (Nginx or Apache) not found"
 160   elif [ "$WEB_SERVICE" != "$(echo "$WEB_SERVICE" | head -n 1)" ]; then
 161     WEB_SERVICE=$(echo "$WEB_SERVICE" | head -n 1)
 162     report_web_service_warning \
 163         "Multiple web services found.  Choosing the first one ($WEB_SERVICE)"
 164   fi
 165
 166   if [ -e /etc/redhat-release ]; then
 167       # Recognize any service that starts with "nginx"; e.g., nginx16.
 168       if [ "$WEB_SERVICE" != "${WEB_SERVICE#nginx}" ]; then
 169         WWW_OWNER=nginx
 170       else
 171         WWW_OWNER=apache
 172       fi
 173   else
 174       # Assume we're on a Debian-based system for now.
 175       # Both Apache and Nginx run as www-data by default.
 176       WWW_OWNER=www-data
 177   fi
 178
 179   echo
 180   echo "Assumption: $WEB_SERVICE is configured to serve Rails from"
 181   echo "            $RELEASE_PATH"
 182   echo "Assumption: $WEB_SERVICE and passenger run as $WWW_OWNER"
 183   echo
 184
 185   echo -n "Creating symlinks to configuration in $CONFIG_PATH ..."
 186   setup_confdirs /etc/arvados "$CONFIG_PATH"
 187   setup_conffile environments/production.rb environments/production.rb.example \
 188       || true
 189   setup_extra_conffiles
 190   echo "... done."
 191
 192   # Before we do anything else, make sure some directories and files are in place
 193   if [ ! -e $SHARED_PATH/log ]; then mkdir -p $SHARED_PATH/log; fi
 194   if [ ! -e $RELEASE_PATH/tmp ]; then mkdir -p $RELEASE_PATH/tmp; fi
 195   if [ ! -e $RELEASE_PATH/log ]; then ln -s $SHARED_PATH/log $RELEASE_PATH/log; fi
 196   if [ ! -e $SHARED_PATH/log/production.log ]; then touch $SHARED_PATH/log/production.log; fi
 197
 198   cd "$RELEASE_PATH"
 199   export RAILS_ENV=production
 200
 201   if ! $COMMAND_PREFIX bundle --version >/dev/null 2>&1; then
 202       run_and_report "Installing bundler" $COMMAND_PREFIX gem install bundler --version 2.2.19 --no-document
 203   fi
 204
 205   run_and_report "Running bundle config set --local path $SHARED_PATH/vendor_bundle" \
 206       $COMMAND_PREFIX bin/bundle config set --local path $SHARED_PATH/vendor_bundle
 207
 208   run_and_report "Running bundle install" \
 209       $COMMAND_PREFIX bin/bundle install --local --quiet
 210
 211   echo -n "Ensuring directory and file permissions ..."
 212   # Ensure correct ownership of a few files
 213   chown "$WWW_OWNER:" $RELEASE_PATH/config/environment.rb
 214   chown "$WWW_OWNER:" $RELEASE_PATH/config.ru
 215   chown "$WWW_OWNER:" $RELEASE_PATH/Gemfile.lock
 216   chown -R "$WWW_OWNER:" $RELEASE_PATH/tmp || true
 217   chown -R "$WWW_OWNER:" $SHARED_PATH/log
 218   # Make sure postgres doesn't try to use a pager.
 219   export PAGER=
 220   case "$RAILSPKG_DATABASE_LOAD_TASK" in
 221       db:schema:load) chown "$WWW_OWNER:" $RELEASE_PATH/db/schema.rb ;;
 222       db:structure:load) chown "$WWW_OWNER:" $RELEASE_PATH/db/structure.sql ;;
 223   esac
 224   chmod 644 $SHARED_PATH/log/*
 225   chmod -R 2775 $RELEASE_PATH/tmp || true
 226   echo "... done."
 227
 228   if [ -n "$RAILSPKG_DATABASE_LOAD_TASK" ]; then
 229       prepare_database
 230   fi
 231
 232   if [ -e /etc/arvados/config.yml ]; then
 233       # warn about config errors (deprecated/removed keys from
 234       # previous version, etc)
 235       run_and_report "Checking configuration for completeness" \
 236                      $COMMAND_PREFIX bin/rake config:check || APPLICATION_READY=0
 237   else
 238       APPLICATION_READY=0
 239   fi
 240
 241   chown -R "$WWW_OWNER:" $RELEASE_PATH/tmp
 242
 243   setup_before_nginx_restart
 244
 245   if [ -n "$SERVICE_MANAGER" ]; then
 246       service_command "$SERVICE_MANAGER" restart "$WEB_SERVICE"
 247   fi
 248 }
 249
 250 if [ "$1" = configure ]; then
 251   # This is a debian-based system
 252   configure_version
 253 elif [ "$1" = "0" ] || [ "$1" = "1" ] || [ "$1" = "2" ]; then
 254   # This is an rpm-based system
 255   configure_version
 256 fi
 257
 258 report_not_ready "$APPLICATION_READY" "/etc/arvados/config.yml"