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         echo -1000 >/proc/self/oom_score_adj
  40         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
  41
  42   - file:
  43      path: /etc/runit/3.d/99-postgres
  44      chmod: "+x"
  45      contents: |
  46        #!/bin/bash
  47        sv stop postgres
  48
  49   - file:
  50      path: /root/upgrade_postgres
  51      chmod: "+x"
  52      contents: |
  53        #!/bin/bash
  54        PG_MAJOR_OLD=`cat /shared/postgres_data/PG_VERSION`
  55
  56        if [ ! "9.5" = "$PG_MAJOR_OLD" ]; then
  57          echo Upgrading PostgreSQL to from version ${PG_MAJOR_OLD} to 9.5
  58          rm -fr /shared/postgres_data_new
  59          install -d -m 0755 -o postgres -g postgres /shared/postgres_data_new && sudo -u postgres /usr/lib/postgresql/9.5/bin/initdb -D /shared/postgres_data_new || exit 0
  60          apt-get update
  61          apt-get install -y postgresql-${PG_MAJOR_OLD}
  62          /etc/init.d/postgresql stop
  63          rm -fr /shared/postgres_data/postmaster.pid
  64          cd ~postgres
  65          cp /etc/postgresql/${PG_MAJOR_OLD}/main/*.conf /shared/postgres_data
  66          echo  >> /shared/postgres_data/postgresql.conf
  67          echo "data_directory = '/shared/postgres_data'" >> /shared/postgres_data/postgresql.conf
  68          SUCCESS=true
  69          sudo -u postgres /usr/lib/postgresql/9.5/bin/pg_upgrade -d /shared/postgres_data -D /shared/postgres_data_new -b /usr/lib/postgresql/${PG_MAJOR_OLD}/bin -B /usr/lib/postgresql/9.5/bin || SUCCESS=false
  70
  71          if [[ "$SUCCESS" == 'false' ]]; then
  72            echo -------------------------------------------------------------------------------------
  73            echo UPGRADE OF POSTGRES FAILED
  74            echo
  75            echo You are going to need to export your data and import into a clean instance:
  76            echo
  77
  78            if [ "$PG_MAJOR_OLD" = "9.2" ]; then
  79              echo Add the line: 'base_image: "samsaffron/discourse:0.1.1"'
  80              echo Change: "templates/postgres.template.yml TO templates/postgres.9.2.template.yml"
  81              echo
  82            fi
  83
  84            if [ "$PG_MAJOR_OLD" = "9.3" ]; then
  85              echo Change: "templates/postgres.template.yml TO templates/postgres.9.3.template.yml"
  86              echo
  87            fi
  88
  89            echo Run "./launcher rebuild app" again
  90            echo
  91            echo When your instance is running:
  92            echo Run "./launcher enter app"
  93            echo Run "cd /shared/postgres_backup && sudo -u postgres pg_dump discourse > backup.db"
  94            echo
  95            echo Undo the base_image and postgres template from your container config
  96            echo Run: "./launcher stop app"
  97            echo Run: "sudo mv /var/discourse/shared/postgres_data /var/shared/postgres_data_old"
  98            echo Run: "./launcher rebuild app"
  99            echo
 100            echo Run: "./launcher enter app"
 101            echo Run: "cd /shared/postgres_backup"
 102            echo Run: "sv stop unicorn"
 103            echo Run: "sudo -iu postgres dropdb discourse"
 104            echo Run: "sudo -iu postgres createdb discourse"
 105            echo Run: "sudo -iu postgres psql discourse < backup.db"
 106            echo Run: "exit"
 107            echo Run: "./launcher rebuild app"
 108            exit 1
 109          fi
 110
 111          mv /shared/postgres_data /shared/postgres_data_old
 112          mv /shared/postgres_data_new /shared/postgres_data
 113
 114          echo -------------------------------------------------------------------------------------
 115          echo UPGRADE OF POSTGRES COMPLETE
 116          echo
 117          echo Old ${PG_MAJOR_OLD} database is stored at /shared/postgres_data_old
 118          echo
 119          echo Please run "./launcher bootstrap" again
 120          echo -------------------------------------------------------------------------------------
 121          exit 1
 122        fi
 123   - exec:
 124       cmd:
 125         - chown -R root /var/lib/postgresql/9.5/main
 126         - "[ ! -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"
 127         - chown -R postgres:postgres /shared/postgres_data
 128         - chown -R postgres:postgres /var/run/postgresql
 129
 130   - exec: /root/upgrade_postgres
 131   - exec: rm /root/upgrade_postgres
 132
 133   - replace:
 134       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 135       from: "data_directory = '/var/lib/postgresql/9.5/main'"
 136       to: "data_directory = '/shared/postgres_data'"
 137
 138   # listen on all interfaces
 139   - replace:
 140       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 141       from: /#?listen_addresses *=.*/
 142       to: "listen_addresses = '*'"
 143
 144   # sync commit off is faster and less spiky, also marginally less safe
 145   - replace:
 146       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 147       from: /#?synchronous_commit *=.*/
 148       to: "synchronous_commit = $db_synchronous_commit"
 149
 150   # default is 128MB which is way too small
 151   - replace:
 152       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 153       from: /#?shared_buffers *=.*/
 154       to: "shared_buffers = $db_shared_buffers"
 155
 156   # default is 1MB which is too small
 157   - replace:
 158       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 159       from: /#?work_mem *=.*/
 160       to: "work_mem = $db_work_mem"
 161
 162   # allow for other
 163   - replace:
 164       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 165       from: /#?default_text_search_config *=.*/
 166       to: "default_text_search_config = '$db_default_text_search_config'"
 167
 168   # Necessary to enable backups
 169   - exec:
 170       cmd:
 171         - install -d -m 0755 -o postgres -g postgres /shared/postgres_backup
 172
 173   - replace:
 174       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 175       from: /#?max_wal_senders *=.*/
 176       to: "max_wal_senders = $db_max_wal_senders"
 177
 178   - replace:
 179       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 180       from: /#?wal_level *=.*/
 181       to: "wal_level = $db_wal_level"
 182
 183   - replace:
 184       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 185       from: /#?checkpoint_segments *=.*/
 186       to: "checkpoint_segments = $db_checkpoint_segments"
 187
 188   - replace:
 189       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 190       from: /#?logging_collector *=.*/
 191       to: "logging_collector = $db_logging_collector"
 192
 193   - replace:
 194       filename: "/etc/postgresql/9.5/main/postgresql.conf"
 195       from: /#?log_min_duration_statement *=.*/
 196       to: "log_min_duration_statement = $db_log_min_duration_statement"
 197
 198   - replace:
 199       filename: "/etc/postgresql/9.5/main/pg_hba.conf"
 200       from: /^#local +replication +postgres +peer$/
 201       to: "local replication postgres  peer"
 202
 203   # allow all to connect in with md5 auth
 204   - replace:
 205       filename: "/etc/postgresql/9.5/main/pg_hba.conf"
 206       from: /^host.*all.*all.*127.*$/
 207       to: "host all all 0.0.0.0/0 md5"
 208
 209   - exec:
 210       background: true
 211       # use fast shutdown for pg
 212       stop_signal: INT
 213       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
 214
 215   # give db a few secs to start up
 216   - exec: "sleep 5"
 217
 218   - exec: su postgres -c 'createdb $db_name' || true
 219   - exec: su postgres -c 'psql $db_name -c "create user $db_user;"' || true
 220   - exec: su postgres -c 'psql $db_name -c "grant all privileges on database $db_name to $db_user;"' || true
 221   - exec: su postgres -c 'psql $db_name -c "alter schema public owner to $db_user;"'
 222   - exec: su postgres -c 'psql template1 -c "create extension if not exists hstore;"'
 223   - exec: su postgres -c 'psql template1 -c "create extension if not exists pg_trgm;"'
 224   - exec: su postgres -c 'psql $db_name -c "create extension if not exists hstore;"'
 225   - exec: su postgres -c 'psql $db_name -c "create extension if not exists pg_trgm;"'
 226   - exec:
 227       stdin: |
 228         update pg_database set encoding = pg_char_to_encoding('UTF8') where datname = '$db_name' AND encoding = pg_char_to_encoding('SQL_ASCII');
 229       cmd: sudo -u postgres psql $db_name
 230       raise_on_fail: false
 231
 232   - file:
 233      path: /var/lib/postgresql/take-database-backup
 234      chown: postgres:postgres
 235      chmod: "+x"
 236      contents: |
 237         #!/bin/bash
 238         ID=db-$(date +%F_%T)
 239         FILENAME=/shared/postgres_backup/$ID.tar.gz
 240         pg_basebackup --format=tar --pgdata=- --xlog --gzip --label=$ID > $FILENAME
 241         echo $FILENAME
 242
 243   - file:
 244      path: /var/spool/cron/crontabs/postgres
 245      contents: |
 246         # m h  dom mon dow   command
 247         #MAILTO=?
 248         #0 */4 * * * /var/lib/postgresql/take-database-backup
 249
 250   - exec:
 251       hook: postgres
 252       cmd: "echo postgres installed!"