전산쟁이의 기록들: postgres

레이블이 postgres인 게시물을 표시합니다. 모든 게시물 표시

2022년 10월 24일 월요일

postgresql 데이터 백업/관리

DB데이터 백업하기
```
-bash-4.1$ pg_dump testdb >  test.sql
```
DB 스키마만 덤프할때
```
bash-4.1$ pg_dump -s testdb >  test.sql
```
데이터 복원
```
bash-4.1$ psql  testdb < test.sql
```

출처 - http://igoni.kr/books/dbms/page/postgresql-ONm

2022년 10월 21일 금요일

postgres 로그디렉토리 생성하기

mkdir -p /var/log/pgsql/

chown -R postgres.dba /var/log/pgsql/

vi /usr/local/pgsql/data/postgresql.conf

logging_collector = on

log_destination = 'stderr'

redirect_stderr = true

log_directory = '/var/log/pgsql/'

log_filename = 'pgsql-%Y-%m-%d_%H%M%S.log'

log_rotation_size = 500MB

출처 - http://igoni.kr/books/dbms/page/postgres

postgres 기초쿼리 정보들

테이블 리스트
```
\dt;
```
테이블 정보 보기
```
\d 테이블 이름
```

테이블 데이터형 변경

postgres=# alter table cities alter column location type varchar(20);

테이블 스페이스 생성
```
postgres=#  create tablespace testdb_space owner testuser location '/usr/local/pgsql/data/testdb';
```
해당 경로는 미리 생성이 되어 있어야 하고, postgres, dba의 권한으로 설정이 되어 있어야 한다.

DB생성

postgres=# create database testdb owner testuser tablespace testdb;

테이블 생성

testdb=> create table member ( num int, name varchar(100) );

데이터 삽입

testdb=> insert into member values (1,'test');

출처

http://igoni.kr/books/dbms/page/postgres-WtF

postgresql 트랜젝션 테스트

testdb=> select * from member;

2022년 8월 4일 목요일

postgresSQL 9.4.26 설치

패키지 설치진행

db실행 사용자 및 data 디렉토리 생성

$> useradd psql
$> mkdir /home/data
$> chown -R psql: /home/data

source 파일 다운로드

$> wget https://ftp.postgresql.org/pub/source/v9.4.26/postgresql-9.4.26.tar.gz --no-check-certificate

depencency 패키지 설치

$> yum install \
readline-devel \
zlib-devel \
openssl-devel \
tcl-devel -y

컴파일 후 설치진행

$> ./configure --prefix=/usr/local/psql --with-openssl --with-tcl
$> make -j 4
$> make -j 4 install

DB 실행

psql 실행

$> su - psql
$> cd /usr/local/psql/bin
$> ./initdb -D /home/data

The files belonging to this database system will be owned by user "psql".
This user must also own the server process.

The database cluster will be initialized with locale "ko_KR.UTF-8".
The default database encoding has accordingly been set to "UTF8".
initdb: could not find suitable text search configuration for locale "ko_KR.UTF-8"
The default text search configuration will be set to "simple".

Data page checksums are disabled.

fixing permissions on existing directory /home/data ... ok
creating subdirectories ... ok
selecting default max_connections ... 100
selecting default shared_buffers ... 128MB
selecting default timezone ... ROK
selecting dynamic shared memory implementation ... posix
creating configuration files ... ok
creating template1 database in /home/data/base/1 ... ok
initializing pg_authid ... ok
initializing dependencies ... ok
creating system views ... ok
loading system objects' descriptions ... ok
creating collations ... ok
creating conversions ... ok
creating dictionaries ... ok
setting privileges on built-in objects ... ok
creating information schema ... ok
loading PL/pgSQL server-side language ... ok
vacuuming database template1 ... ok
copying template1 to template0 ... ok
copying template1 to postgres ... ok
syncing data to disk ... ok

WARNING: enabling "trust" authentication for local connections
You can change this by editing pg_hba.conf or using the option -A, or
--auth-local and --auth-host, the next time you run initdb.

Success. You can now start the database server using:

    ./postgres -D /home/data
or
    ./pg_ctl -D /home/data -l logfile start

프로세스 실행

$ /usr/local/psql/bin/postgres -D /home/data/ >logfile  2>&1 &

프로세스 실행상태 확인

$> ps -ef | grep post
psql     16193 16108  0 10:54 pts/0    00:00:00 /usr/local/psql/bin/postgres -D /home/data/
psql     16195 16193  0 10:54 ?        00:00:00 postgres: checkpointer process
psql     16196 16193  0 10:54 ?        00:00:00 postgres: writer process
psql     16197 16193  0 10:54 ?        00:00:00 postgres: wal writer process
psql     16198 16193  0 10:54 ?        00:00:00 postgres: autovacuum launcher process
psql     16199 16193  0 10:54 ?        00:00:00 postgres: stats collector process
psql     16201 16108  0 10:54 pts/0    00:00:00 grep --color=auto post

 netstat -antp | grep postgres
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN      16193/postgres
tcp6       0      0 ::1:5432                :::*                    LISTEN      16193/postgres

출처 - http://igoni.kr/books/dbms/page/postgressql-9426

postgresSQL 9.2.4 설치

설치정보
- Postgressql : 9.2.4
- OS : Centos 5.10

postgressql 컴파일때 필요한 패키지 설치

$> yum -y install compat-readline43 readline-devel crypto-utils.* openssl* readline-devel pam-devel

압축 해제하고 , 컴파일 -> 설치 들어가기

$> tar -zxvf postgresql-9.2.4.tar.gz
$> cd postgresql-9.2.4
./configure \
-&#45enable-nls=’ko’ \
-&#45enable-depend \
-&#45enable-thread-safety \
--mandir=/usr/share/man \
--with-includes=/usr/include \
--with-pam \
--with-openssl \
--without-tcl \
--without-perl \
--without-python
$> gmake ; gmake install

postgres사용자 추가

$> groupadd dba
$> adduser -d /usr/local/pgsql -g dba -c “PostgreSQL Master User” -m -s $> /bin/bash postgres
$> mkdir /usr/local/pgsql/data
$> chown postgres /usr/local/pgsql/data
$> chown -R postgres:dba /usr/local/pgsql
$> cd /usr/local/pgsql
$> chown -R root lib include

추가된 postgres sql 사용자에 대해서 postgessql 사용할수 있게 설정

$> su – postgres
$> echo "
export MANPATH=\$HOME/man
export PGDATA=/usr/local/pgsql/data
export PATH=$PATH:/usr/local/pgsql/bin" >> /usr/local/pgsql/.bash_profile
$> source /usr/local/pgsql/.bash_profile
$> exit

postgressql DB초기화 하기

$> su - postgres -c "/usr/local/pgsql/bin/initdb -D /usr/local/pgsql/data"

재부팅 이후에도 실행할 수 있게 rc.local에 등록하기

$> echo 'su – postgres -c "/usr/local/pgsql/bin/pg_ctl start -D /usr/local/pgsql/data/" &' >> /etc/rc.d/rc.local

네트워크에서 5432번 포트 열려있는지 확인

$> netstat -antp
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
...
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 22435/postgres
...

출처 - http://igoni.kr/books/dbms/page/postgressql-924

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