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