PostgreSQL 15 : Install2024/02/09 |
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Install PostgreSQL to configure database server.
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| [1] | Install and start PostgreSQL. |
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root@www:~ #
root@www:~ # pkg install -y postgresql15-server sysrc postgresql_enable="YES" root@www:~ # /usr/local/etc/rc.d/postgresql initdb The files belonging to this database system will be owned by user "postgres". This user must also own the server process. ..... .....root@www:~ # service postgresql start 2024-02-09 15:40:37.963 JST [984] LOG: ending log output to stderr 2024-02-09 15:40:37.963 JST [984] HINT: Future log output will go to log destination "syslog". |
| [2] | By default setting, it's possible to connect to PostgreSQL Server only from Localhost. Refer to the official site below about details of authentication methods. ⇒ https://www.postgresql.jp/document/10/html/auth-pg-hba-conf.html |
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# listen only localhost by default root@www:~ # grep listen_addresses /var/db/postgres/data15/postgresql.conf #listen_addresses = 'localhost' # what IP address(es) to listen on; # change authentication methods because default setting is insecure root@www:~ # cp -p /var/db/postgres/data15/pg_hba.conf /var/db/postgres/data15/pg_hba.conf.org
root@www:~ # cat > /var/db/postgres/data15/pg_hba.conf <<'EOF'
local all all peer
host all all 127.0.0.1/32 ident
host all all ::1/128 ident
local replication all peer
host replication all 127.0.0.1/32 ident
host replication all ::1/128 ident
EOF
root@www:~ # service postgresql restart |
| [3] | Add PostgreSQL user and its Database with PostgreSQL admin user. |
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# add OS user root@www:~ # pw useradd freebsd -m root@www:~ # passwd freebsd
# add PostgreSQL user that name is the same with OS user root@www:~ # su - postgres $ createuser freebsd $ createdb testdb -O freebsd
# show users and databases $ psql -c "select usename from pg_user;"
usename ---------- postgres freebsd (2 rows)$ psql -l
List of databases
Name | Owner | Encoding | Locale Provider | Collate | Ctype | ICU Locale | ICU Rules | Access privileges
-----------+----------+----------+-----------------+---------+---------+------------+-----------+-----------------------
postgres | postgres | UTF8 | libc | C.UTF-8 | C.UTF-8 | | |
template0 | postgres | UTF8 | libc | C.UTF-8 | C.UTF-8 | | | =c/postgres +
| | | | | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | libc | C.UTF-8 | C.UTF-8 | | | =c/postgres +
| | | | | | | | postgres=CTc/postgres
testdb | freebsd | UTF8 | libc | C.UTF-8 | C.UTF-8 | | |
(4 rows)
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| [4] | Try to connect to PostgreSQL Database with a user added above. |
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# connect to testdb freebsd@www:~ $ psql testdb psql (15.5) Type "help" for help. # show user roles testdb=> \du List of roles Role name | Attributes -----------+------------------------------------------------------------ freebsd | postgres | Superuser, Create role, Create DB, Replication, Bypass RLS # show databases testdb=> \l List of databases Name | Owner | Encoding | Locale Provider | Collate | Ctype | ICU Locale | ICU Rules | Access privileges -----------+----------+----------+-----------------+---------+---------+------------+-----------+----------------------- postgres | postgres | UTF8 | libc | C | C.UTF-8 | | | template0 | postgres | UTF8 | libc | C | C.UTF-8 | | | =c/postgres + | | | | | | | | postgres=CTc/postgres template1 | postgres | UTF8 | libc | C | C.UTF-8 | | | =c/postgres + | | | | | | | | postgres=CTc/postgres testdb | freebsd | UTF8 | libc | C | C.UTF-8 | | | (4 rows) # create a test table testdb=> create table test_table (no int, name text); CREATE TABLE # show tables testdb=> \dt List of relations Schema | Name | Type | Owner --------+------------+-------+--------- public | test_table | table | freebsd (1 row) # insert data to test table testdb=> insert into test_table (no,name) values (01,'FreeBSD'); INSERT 0 1 # confirm testdb=> select * from test_table; no | name ----+--------- 1 | FreeBSD (1 row) # remove test table testdb=> drop table test_table; DROP TABLE testdb=> \dt Did not find any relations. # exit testdb=> \q # remove testdb freebsd@www:~ $ dropdb testdb freebsd@www:~ $ psql -l
List of databases
Name | Owner | Encoding | Locale Provider | Collate | Ctype | ICU Locale | ICU Rules | Access privileges
-----------+----------+----------+-----------------+---------+---------+------------+-----------+-----------------------
postgres | postgres | UTF8 | libc | C | C.UTF-8 | | |
template0 | postgres | UTF8 | libc | C | C.UTF-8 | | | =c/postgres +
| | | | | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | libc | C | C.UTF-8 | | | =c/postgres +
| | | | | | | | postgres=CTc/postgres
(3 rows)
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