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 hooks:
  15   before_code:
  16     - replace:
  17        filename: /etc/service/unicorn/run
  18        from: "# postgres"
  19        to: sv start postgres || exit 1
  20
  21 run:
  22   - exec: locale-gen $LANG && update-locale
  23   - exec: mkdir -p /shared/postgres_run
  24   - exec: chown postgres:postgres /shared/postgres_run
  25   - exec: chmod 775 /shared/postgres_run
  26   - exec: rm -fr /var/run/postgresql
  27   - exec: ln -s /shared/postgres_run /var/run/postgresql
  28   - exec: socat /dev/null UNIX-CONNECT:/shared/postgres_run/.s.PGSQL.5432 || exit 0 && echo postgres already running stop container ; exit 1
  29   - exec: rm -fr /shared/postgres_run/.s*
  30   - exec: rm -fr /shared/postgres_run/*.pid
  31   - exec: mkdir -p /shared/postgres_run/10-main.pg_stat_tmp
  32   - exec: chown postgres:postgres /shared/postgres_run/10-main.pg_stat_tmp
  33   - file:
  34      path: /etc/service/postgres/run
  35      chmod: "+x"
  36      contents: |
  37         #!/bin/sh
  38         exec 2>&1
  39         HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/10/bin/postmaster -D /etc/postgresql/10/main
  40
  41   - file:
  42      path: /etc/service/postgres/log/run
  43      chmod: "+x"
  44      contents: |
  45        #!/bin/sh
  46        mkdir -p /var/log/postgres
  47        exec svlogd /var/log/postgres
  48
  49   - file:
  50      path: /etc/runit/3.d/99-postgres
  51      chmod: "+x"
  52      contents: |
  53        #!/bin/bash
  54        sv stop postgres
  55
  56   - file:
  57      path: /root/upgrade_postgres
  58      chmod: "+x"
  59      contents: |
  60        #!/bin/bash
  61        PG_MAJOR_OLD=`cat /shared/postgres_data/PG_VERSION`
  62
  63        if [ ! "10" = "$PG_MAJOR_OLD" ]; then
  64          echo Upgrading PostgreSQL from version ${PG_MAJOR_OLD} to 10
  65          free_disk=$(df /shared | tail -n 1 | awk '{print $4}')
  66          required=$(($(du -s /shared/postgres_data | awk '{print $1}') * 2))
  67
  68          if [ "$free_disk" -lt "$required" ]; then
  69           echo "WARNING: Upgrading PostgresSQL would require an addtional $(numfmt --to=si $(($required - $free_disk))) of disk space"
  70           echo "Please free up some space, or expand your disk, before continuing."
  71           echo ''
  72           echo 'To avoid upgrading change "templates/postgres.template.yml" TO "templates/postgres.9.5.template.yml" in containers/app.yml'
  73           exit 1
  74          fi
  75
  76          rm -fr /shared/postgres_data_new
  77          install -d -m 0755 -o postgres -g postgres /shared/postgres_data_new && sudo -u postgres /usr/lib/postgresql/10/bin/initdb -D /shared/postgres_data_new || exit 0
  78          apt-get update
  79          apt-get install -y postgresql-${PG_MAJOR_OLD}
  80          chown -R postgres:postgres /var/lib/postgresql/10
  81          /etc/init.d/postgresql stop
  82          rm -fr /shared/postgres_data/postmaster.pid
  83          cd ~postgres
  84          cp -pr /etc/postgresql/${PG_MAJOR_OLD}/main/* /shared/postgres_data
  85          echo  >> /shared/postgres_data/postgresql.conf
  86          echo "data_directory = '/shared/postgres_data'" >> /shared/postgres_data/postgresql.conf
  87          SUCCESS=true
  88          sudo -u postgres /usr/lib/postgresql/10/bin/pg_upgrade -d /shared/postgres_data -D /shared/postgres_data_new -b /usr/lib/postgresql/${PG_MAJOR_OLD}/bin -B /usr/lib/postgresql/10/bin || SUCCESS=false
  89
  90          if [[ "$SUCCESS" == 'false' ]]; then
  91            echo -------------------------------------------------------------------------------------
  92            echo UPGRADE OF POSTGRES FAILED
  93            echo
  94            echo You are going to need to export your data and import into a clean instance:
  95            echo
  96
  97            if [ "$PG_MAJOR_OLD" = "9.5" ]; then
  98              echo 'In containers/app.yml: Change "templates/postgres.template.yml" TO "templates/postgres.9.5.template.yml"'
  99              echo
 100            fi
 101
 102            echo Run "./launcher rebuild app" again
 103            echo
 104            echo When your instance is running:
 105            echo Run "./launcher enter app"
 106            echo Run apt-get remove postgresql-client-9.5 && apt-get instatll postgresql-client-10
 107            echo Run "cd /shared/postgres_backup && sudo -u postgres pg_dump discourse > backup.db"
 108            echo
 109
 110            if [ "$PG_MAJOR_OLD" = "9.5" ]; then
 111              echo Undo the base_image in your container config
 112            fi
 113
 114            echo Run: "./launcher stop app"
 115            echo Run: "sudo mv /var/discourse/shared/standalone/postgres_data /var/discourse/shared/standalone/postgres_data_old"
 116            echo Run: "./launcher rebuild app"
 117            echo
 118            echo Run: "./launcher enter app"
 119            echo Run: "cd /shared/postgres_backup"
 120            echo Run: "sv stop unicorn"
 121            echo Run: "sudo -iu postgres dropdb discourse"
 122            echo Run: "sudo -iu postgres createdb discourse"
 123            echo Run: "sudo -iu postgres psql discourse < backup.db"
 124            echo Run: "exit"
 125            echo Run: "./launcher rebuild app"
 126            exit 1
 127          fi
 128
 129          mv /shared/postgres_data /shared/postgres_data_old
 130          mv /shared/postgres_data_new /shared/postgres_data
 131
 132          echo -------------------------------------------------------------------------------------
 133          echo UPGRADE OF POSTGRES COMPLETE
 134          echo
 135          echo Old ${PG_MAJOR_OLD} database is stored at /shared/postgres_data_old
 136          echo
 137          echo To complete the upgrade, rebuild again using:
 138          echo
 139          echo     ./launcher rebuild app
 140          echo -------------------------------------------------------------------------------------
 141          # Magic exit status to denote no failure
 142          exit 77
 143        fi
 144
 145   - exec:
 146       cmd:
 147         - chown -R root /var/lib/postgresql/10/main
 148         - "[ ! -e /shared/postgres_data ] && install -d -m 0755 -o postgres -g postgres /shared/postgres_data && sudo -E -u postgres /usr/lib/postgresql/10/bin/initdb -D /shared/postgres_data || exit 0"
 149         - chown -R postgres:postgres /shared/postgres_data
 150         - chown -R postgres:postgres /var/run/postgresql
 151
 152   - exec: /root/upgrade_postgres
 153   - exec: rm /root/upgrade_postgres
 154
 155   - replace:
 156       filename: "/etc/postgresql/10/main/postgresql.conf"
 157       from: "data_directory = '/var/lib/postgresql/10/main'"
 158       to: "data_directory = '/shared/postgres_data'"
 159
 160   # listen on all interfaces
 161   - replace:
 162       filename: "/etc/postgresql/10/main/postgresql.conf"
 163       from: /#?listen_addresses *=.*/
 164       to: "listen_addresses = '*'"
 165
 166   # sync commit off is faster and less spiky, also marginally less safe
 167   - replace:
 168       filename: "/etc/postgresql/10/main/postgresql.conf"
 169       from: /#?synchronous_commit *=.*/
 170       to: "synchronous_commit = $db_synchronous_commit"
 171
 172   # default is 128MB which is way too small
 173   - replace:
 174       filename: "/etc/postgresql/10/main/postgresql.conf"
 175       from: /#?shared_buffers *=.*/
 176       to: "shared_buffers = $db_shared_buffers"
 177
 178   # default is 1MB which is too small
 179   - replace:
 180       filename: "/etc/postgresql/10/main/postgresql.conf"
 181       from: /#?work_mem *=.*/
 182       to: "work_mem = $db_work_mem"
 183
 184   # allow for other
 185   - replace:
 186       filename: "/etc/postgresql/10/main/postgresql.conf"
 187       from: /#?default_text_search_config *=.*/
 188       to: "default_text_search_config = '$db_default_text_search_config'"
 189
 190   # Necessary to enable backups
 191   - exec:
 192       cmd:
 193         - install -d -m 0755 -o postgres -g postgres /shared/postgres_backup
 194
 195   - replace:
 196       filename: "/etc/postgresql/10/main/postgresql.conf"
 197       from: /#?max_wal_senders *=.*/
 198       to: "max_wal_senders = $db_max_wal_senders"
 199
 200   - replace:
 201       filename: "/etc/postgresql/10/main/postgresql.conf"
 202       from: /#?wal_level *=.*/
 203       to: "wal_level = $db_wal_level"
 204
 205   - replace:
 206       filename: "/etc/postgresql/10/main/postgresql.conf"
 207       from: /#?checkpoint_segments *=.*/
 208       to: "checkpoint_segments = $db_checkpoint_segments"
 209
 210   - replace:
 211       filename: "/etc/postgresql/10/main/postgresql.conf"
 212       from: /#?logging_collector *=.*/
 213       to: "logging_collector = $db_logging_collector"
 214
 215   - replace:
 216       filename: "/etc/postgresql/10/main/postgresql.conf"
 217       from: /#?log_min_duration_statement *=.*/
 218       to: "log_min_duration_statement = $db_log_min_duration_statement"
 219
 220   - replace:
 221       filename: "/etc/postgresql/10/main/pg_hba.conf"
 222       from: /^#local +replication +postgres +peer$/
 223       to: "local replication postgres  peer"
 224
 225   # allow all to connect in with md5 auth
 226   - replace:
 227       filename: "/etc/postgresql/10/main/pg_hba.conf"
 228       from: /^host.*all.*all.*127.*$/
 229       to: "host all all 0.0.0.0/0 md5"
 230
 231   - exec:
 232       background: true
 233       # use fast shutdown for pg
 234       stop_signal: INT
 235       cmd: HOME=/var/lib/postgresql USER=postgres exec chpst -u postgres:postgres:ssl-cert -U postgres:postgres:ssl-cert /usr/lib/postgresql/10/bin/postmaster -D /etc/postgresql/10/main
 236
 237   # give db a few secs to start up
 238   - exec: "sleep 5"
 239
 240   - exec: su postgres -c 'createdb $db_name' || true
 241   - exec: su postgres -c 'psql $db_name -c "create user $db_user;"' || true
 242   - exec: su postgres -c 'psql $db_name -c "grant all privileges on database $db_name to $db_user;"' || true
 243   - exec: su postgres -c 'psql $db_name -c "alter schema public owner to $db_user;"'
 244   - exec: su postgres -c 'psql template1 -c "create extension if not exists hstore;"'
 245   - exec: su postgres -c 'psql template1 -c "create extension if not exists pg_trgm;"'
 246   - exec: su postgres -c 'psql $db_name -c "create extension if not exists hstore;"'
 247   - exec: su postgres -c 'psql $db_name -c "create extension if not exists pg_trgm;"'
 248   - exec:
 249       stdin: |
 250         update pg_database set encoding = pg_char_to_encoding('UTF8') where datname = '$db_name' AND encoding = pg_char_to_encoding('SQL_ASCII');
 251       cmd: sudo -u postgres psql $db_name
 252       raise_on_fail: false
 253
 254   - file:
 255      path: /var/lib/postgresql/take-database-backup
 256      chown: postgres:postgres
 257      chmod: "+x"
 258      contents: |
 259         #!/bin/bash
 260         ID=db-$(date +%F_%T)
 261         FILENAME=/shared/postgres_backup/$ID.tar.gz
 262         pg_basebackup --format=tar --pgdata=- --xlog --gzip --label=$ID > $FILENAME
 263         echo $FILENAME
 264
 265   - file:
 266      path: /var/spool/cron/crontabs/postgres
 267      contents: |
 268         # m h  dom mon dow   command
 269         #MAILTO=?
 270         #0 */4 * * * /var/lib/postgresql/take-database-backup
 271
 272   - exec:
 273       hook: postgres
 274       cmd: "echo postgres installed!"