templates/postgres.template.yml

   1 params:
   2   db_synchronous_commit: "off"
   3   db_shared_buffers: "256MB"
   4   db_work_mem: "10MB"
   5   db_default_text_search_config: "pg_catalog.english"
   6   db_name: discourse
   7   db_user: discourse
   8   db_wal_level: minimal
   9   db_max_wal_senders: 0
  10   db_checkpoint_segments: 6
  11   db_logging_collector: off
  12   db_log_min_duration_statement: 100
  13
  14
  15 hooks:
  16   before_code:
  17     - replace:
  18        filename: /etc/service/unicorn/run
  19        from: "# postgres"
  20        to: sv start postgres || exit 1
  21
  22 run:
  23   - exec: mkdir -p /shared/postgres_run
  24   - exec: chown postgres:postgres /shared/postgres_run
  25   - exec: chmod 775 /shared/postgres_run
  26   - exec: rm -fr /var/run/postgresql
  27   - exec: ln -s /shared/postgres_run /var/run/postgresql
  28   - exec: socat /dev/null UNIX-CONNECT:/shared/postgres_run/.s.PGSQL.5432 || exit 0 && echo postgres already running stop container ; exit 1
  29   - exec: rm -fr /shared/postgres_run/.s*
  30   - exec: rm -fr /shared/postgres_run/*.pid
  31   - exec: mkdir -p /shared/postgres_run/9.5-main.pg_stat_tmp
  32   - exec: chown postgres:postgres /shared/postgres_run/9.5-main.pg_stat_tmp
  33   - file:
  34      path: /etc/service/postgres/run
  35      chmod: "+x"
  36      contents: |
  37         #!/bin/sh
  38         exec 2>&1
  39         HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/9.5/bin/postmaster -D /etc/postgresql/9.5/main
  40   - file:
  41      path: /etc/service/postgres/log/run
  42      chmod: "+x"
  43      contents: |
  44        #!/bin/sh
  45        mkdir -p /var/log/postgres
  46        exec svlogd /var/log/postgres
  47
  48   - file:
  49      path: /etc/runit/3.d/99-postgres
  50      chmod: "+x"
  51      contents: |
  52        #!/bin/bash
  53        sv stop postgres
  54
  55   - file:
  56      path: /root/upgrade_postgres
  57      chmod: "+x"
  58      contents: |
  59        #!/bin/bash
  60        PG_MAJOR_OLD=`cat /shared/postgres_data/PG_VERSION`
  61
  62        if [ ! "9.5" = "$PG_MAJOR_OLD" ]; then
  63          echo Upgrading PostgreSQL to from version ${PG_MAJOR_OLD} to 9.5
  64          rm -fr /shared/postgres_data_new
  65          install -d -m 0755 -o postgres -g postgres /shared/postgres_data_new && sudo -u postgres /usr/lib/postgresql/9.5/bin/initdb -D /shared/postgres_data_new || exit 0
  66          apt-get update
  67          apt-get install -y postgresql-${PG_MAJOR_OLD}
  68          /etc/init.d/postgresql stop
  69          rm -fr /shared/postgres_data/postmaster.pid
  70          cd ~postgres
  71          cp /etc/postgresql/${PG_MAJOR_OLD}/main/*.conf /shared/postgres_data
  72          echo  >> /shared/postgres_data/postgresql.conf
  73          echo "data_directory = '/shared/postgres_data'" >> /shared/postgres_data/postgresql.conf
  74          SUCCESS=true
  75          sudo -u postgres /usr/lib/postgresql/9.5/bin/pg_upgrade -d /shared/postgres_data -D /shared/postgres_data_new -b /usr/lib/postgresql/${PG_MAJOR_OLD}/bin -B /usr/lib/postgresql/9.5/bin || SUCCESS=false
  76
  77          if [[ "$SUCCESS" == 'false' ]]; then
  78            echo -------------------------------------------------------------------------------------
  79            echo UPGRADE OF POSTGRES FAILED
  80            echo
  81            echo You are going to need to export your data and import into a clean instance:
  82            echo
  83
  84            if [ "$PG_MAJOR_OLD" = "9.2" ]; then
  85              echo Add the line: 'base_image: "samsaffron/discourse:0.1.1"'
  86              echo 'In containers/app.yml: Change "templates/postgres.template.yml" TO "templates/postgres.9.2.template.yml"'
  87              echo
  88            fi
  89
  90            if [ "$PG_MAJOR_OLD" = "9.3" ]; then
  91              echo 'In containers/app.yml: Change "templates/postgres.template.yml" TO "templates/postgres.9.3.template.yml"'
  92              echo
  93            fi
  94
  95            echo Run "./launcher rebuild app" again
  96            echo
  97            echo When your instance is running:
  98            echo Run "./launcher enter app"
  99            echo Run "cd /shared/postgres_backup && sudo -u postgres pg_dump discourse > backup.db"
 100            echo
 101            if [ "$PG_MAJOR_OLD" = "9.2" ]; then
 102              echo Undo the base_image in your container config
 103            fi
 104            if [ "$PG_MAJOR_OLD" = "9.3" ]; then
 105              echo Undo the postgres template in your container config
 106            fi
 107            echo Run: "./launcher stop app"
 108            echo Run: "sudo mv /var/discourse/shared/standalone/postgres_data /var/discourse/shared/standalone/postgres_data_old"
 109            echo Run: "./launcher rebuild app"
 110            echo
 111            echo Run: "./launcher enter app"
 112            echo Run: "cd /shared/postgres_backup"
 113            echo Run: "sv stop unicorn"
 114            echo Run: "sudo -iu postgres dropdb discourse"
 115            echo Run: "sudo -iu postgres createdb discourse"
 116            echo Run: "sudo -iu postgres psql discourse < backup.db"
 117            echo Run: "exit"
 118            echo Run: "./launcher rebuild app"
 119            exit 1
 120          fi
 121
 122          mv /shared/postgres_data /shared/postgres_data_old
 123          mv /shared/postgres_data_new /shared/postgres_data
 124
 125          echo -------------------------------------------------------------------------------------
 126          echo UPGRADE OF POSTGRES COMPLETE
 127          echo
 128          echo Old ${PG_MAJOR_OLD} database is stored at /shared/postgres_data_old
 129          echo
 130          echo To complete the upgrade, rebuild again using:
 131          echo
 132          echo     ./launcher rebuild app
 133          echo -------------------------------------------------------------------------------------
 134          # Magic exit status to denote no failure
 135          exit 77
 136        fi
 137   - exec:
 138       cmd:
 139         - chown -R root /var/lib/postgresql/9.5/main
 140         - "[ ! -e /shared/postgres_data ] && install -d -m 0755 -o postgres -g postgres /shared/postgres_data && sudo -E -u postgres /usr/lib/postgresql/9.5/bin/initdb -D /shared/postgres_data || exit 0"
 141         - chown -R postgres:postgres /shared/postgres_data
 142         - chown -R postgres:postgres /var/run/postgresql
 143
 144   - exec: /root/upgrade_postgres
 145   - exec: rm /root/upgrade_postgres
 146
 147   - replace:
 148       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 149       from: "data_directory = '/var/lib/postgresql/9.5/main'"
 150       to: "data_directory = '/shared/postgres_data'"
 151
 152   # listen on all interfaces
 153   - replace:
 154       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 155       from: /#?listen_addresses *=.*/
 156       to: "listen_addresses = '*'"
 157
 158   # sync commit off is faster and less spiky, also marginally less safe
 159   - replace:
 160       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 161       from: /#?synchronous_commit *=.*/
 162       to: "synchronous_commit = $db_synchronous_commit"
 163
 164   # default is 128MB which is way too small
 165   - replace:
 166       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 167       from: /#?shared_buffers *=.*/
 168       to: "shared_buffers = $db_shared_buffers"
 169
 170   # default is 1MB which is too small
 171   - replace:
 172       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 173       from: /#?work_mem *=.*/
 174       to: "work_mem = $db_work_mem"
 175
 176   # allow for other
 177   - replace:
 178       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 179       from: /#?default_text_search_config *=.*/
 180       to: "default_text_search_config = '$db_default_text_search_config'"
 181
 182   # Necessary to enable backups
 183   - exec:
 184       cmd:
 185         - install -d -m 0755 -o postgres -g postgres /shared/postgres_backup
 186
 187   - replace:
 188       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 189       from: /#?max_wal_senders *=.*/
 190       to: "max_wal_senders = $db_max_wal_senders"
 191
 192   - replace:
 193       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 194       from: /#?wal_level *=.*/
 195       to: "wal_level = $db_wal_level"
 196
 197   - replace:
 198       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 199       from: /#?checkpoint_segments *=.*/
 200       to: "checkpoint_segments = $db_checkpoint_segments"
 201
 202   - replace:
 203       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 204       from: /#?logging_collector *=.*/
 205       to: "logging_collector = $db_logging_collector"
 206
 207   - replace:
 208       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 209       from: /#?log_min_duration_statement *=.*/
 210       to: "log_min_duration_statement = $db_log_min_duration_statement"
 211
 212   - replace:
 213       filename: "/etc/postgresql/9.5/main/pg_hba.conf"
 214       from: /^#local +replication +postgres +peer$/
 215       to: "local replication postgres  peer"
 216
 217   # allow all to connect in with md5 auth
 218   - replace:
 219       filename: "/etc/postgresql/9.5/main/pg_hba.conf"
 220       from: /^host.*all.*all.*127.*$/
 221       to: "host all all 0.0.0.0/0 md5"
 222
 223   - exec:
 224       background: true
 225       # use fast shutdown for pg
 226       stop_signal: INT
 227       cmd: HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/9.5/bin/postmaster -D /etc/postgresql/9.5/main
 228
 229   # give db a few secs to start up
 230   - exec: "sleep 5"
 231
 232   - exec: su postgres -c 'createdb $db_name' || true
 233   - exec: su postgres -c 'psql $db_name -c "create user $db_user;"' || true
 234   - exec: su postgres -c 'psql $db_name -c "grant all privileges on database $db_name to $db_user;"' || true
 235   - exec: su postgres -c 'psql $db_name -c "alter schema public owner to $db_user;"'
 236   - exec: su postgres -c 'psql template1 -c "create extension if not exists hstore;"'
 237   - exec: su postgres -c 'psql template1 -c "create extension if not exists pg_trgm;"'
 238   - exec: su postgres -c 'psql $db_name -c "create extension if not exists hstore;"'
 239   - exec: su postgres -c 'psql $db_name -c "create extension if not exists pg_trgm;"'
 240   - exec:
 241       stdin: |
 242         update pg_database set encoding = pg_char_to_encoding('UTF8') where datname = '$db_name' AND encoding = pg_char_to_encoding('SQL_ASCII');
 243       cmd: sudo -u postgres psql $db_name
 244       raise_on_fail: false
 245
 246   - file:
 247      path: /var/lib/postgresql/take-database-backup
 248      chown: postgres:postgres
 249      chmod: "+x"
 250      contents: |
 251         #!/bin/bash
 252         ID=db-$(date +%F_%T)
 253         FILENAME=/shared/postgres_backup/$ID.tar.gz
 254         pg_basebackup --format=tar --pgdata=- --xlog --gzip --label=$ID > $FILENAME
 255         echo $FILENAME
 256
 257   - file:
 258      path: /var/spool/cron/crontabs/postgres
 259      contents: |
 260         # m h  dom mon dow   command
 261         #MAILTO=?
 262         #0 */4 * * * /var/lib/postgresql/take-database-backup
 263
 264   - exec:
 265       hook: postgres
 266       cmd: "echo postgres installed!"