ืขืก ืคึผืื ืงื ืึทืืื ืืขืืจืืคื ืึทื ืืื ืืขืจ ืฆืืื ืืืขื ืื ืคึผืจืึธืืืขื ืืื ืืขืืืขื ืืขืฉืืขืื, ืืื ืืื ื ืืฉื ืืึธืื ืืขื ืื ืืขืจืคืึทืจืื ื ืฆื ืึทื ืืืืืงืืขื ืืื ืงืึทืืขืจ ืืขื ืืืืืื ื ืึทืืืื. ืืื ืืขืืึธืื ืืื ืกืืึทืจืืขื ืืืืืื ื.
ืืื ืืืืืก ื ืืฉื ืืืืก ืื ืืืค ืืื, ืืืขืจ ืฆืื ืืคืื ืืื ืฉืืขื ืืื ืืื ืืื ืืขื ืคืืงื ืื ืืคืืื ืืืื ืืื ืื ืืืขืก ืฉืจืื ืคืืจ ืฉืจืื ืืื ืืื ืื ืืืืึธืจืืึทื, ืืจืืืื ืืื ืื ืืขืืืข ืกืืืื ืืื ืืขืจ ืืืืจ, ืืึทื ืึทืจืืขื ืงืืื ืืึธื ืืึธืจื ืืฉื. ืืื ืืึธื ืงืืื ืืขืืึทื ืง ืืืึธืก ืืื ืืขืจ ืขื ืื, ืึธืืขืจ ืืืขื ืืื ืืขืคึผืืึธื ืืขืจื ืืขื ืืืืืขืจ, ืืื ืืึทืฉืืึธืกื ืึทื ืืื ืืืขื ืฉืจืืึทืื ืืืื ืืืืืขื ืข ืืืืึธืจืืึทื ืืืขื ืึทืืฅ ืึทืจืืขื ืืืืก. ืืืื ืขืจ ืืืึธืก ืืืขื ืืืฉืืืื ืึทืจืืขื.
ืืืืืขืก ืืืืฃ ืืขืจ ืืื ืืขืจื ืขืฅ
ืขืก ืืื ืคึผืื ืงื ืึทืืื ืืึทืคึผืึทื ื ืึทื ืืขืจ ืืื ืืขืจื ืขืฅ ืืืึทืื ื ืืฉื ืคืื ืึท ืคืขืื ืคืื ืคืึทืจืฉืืื ืคืืจืขืจ, ืืืืึธืจืืึทืื, ืฉืจืื-ืืืจื-ืฉืจืื ืืื ืื ืืื. ืขืก ืคึผืื ืงื ืึทืืื ืืขืืจืืคื ืึทื ืืื ืืื ืืขืืืขื ืืึทืกืงื ืืื ืืขืืืขืืึธืคึผืื ื ืึท ืืืืืื ื ืคึฟืึทืจ ืงืึทื ืืืื ืืึทื ืืื ืึธืจืืึทื ืืืืจื ืืื ืืืืขื ืึท ืคืึทืืืึธืืืขืจ PostgreSQL ืงื ืืื, ืื ืืืืคึผื ืจืขืงืืืืจืขืืขื ืฅ ืคึฟืึทืจ ืืืึธืก ืืขื ืขื ืกืืจืืืื ื ืจืขืคึผืืึทืงืืืฉืึทื ืคืื ืื ืืืจ ืกืขืจืืืขืจ ืฆื ืึทืืข ืจืขืคึผืืึทืงืึทื ืืื ืึธืืึทืืึทืืืง ืคึผืจืึทืืืืืฉืึทื ื ืคืื ืึท ืจืขืืขืจืื ืืื ืื ืืขืฉืขืขื ืืฉ ืคืื ืึท ืืืจ ืกืขืจืืืขืจ ืืืจืืคืึทื.
ืืื ืืขื ืืื ืข, ืื ืึธื ืืืืื ืคืื ืืขืงื ืึทืืึทืืืฉืื ืืขื ืืฆื ืืื ืืืฉืืืกื:
- PostgreSQL ืืื ืึท DBMS
- ืืื ืึท ืงืืึทืกืืขืจืื ื ืืืืืื ื
- ืขืืง ืืื ืคืื ืื ืืขืจืืขืืืืื ืกืืึธืจืืืืฉ ืคึฟืึทืจ Patroni
- HAproxy ืคึฟืึทืจ ืึธืจืืึทื ืืืืื ื ืึท ืืืื ืคึผืึธืืืฆืืข ืคืื ื ืคึฟืึทืจ ืึทืคึผืืึทืงืืืฉืึทื ื ื ืืฆื ืื ืืึทืืึทืืืืก
ืื ืกืืึทืืืจืื ื
ืคึฟืึทืจ ืืืื ืืคืืขืจืงืืึทืืงืืื - ืืืืขื ืึท ืืขืืกื ืื ืืืฆื PostgreSQL ืงื ืืื ืืื Patroni, ืขืืง, HAProxy.
ืึทืืข ืึทืคึผืขืจืืืฉืึทื ื ืืขื ืขื ืืืจืืืขืงืึธืื ืืืืฃ ืืืืจืืืึทื ืืืฉืื ืขื ืืื ืืขืืืึทื 10 ืึทืก ืืื ืกืืึทืืืจื.
ืขืืงื
ืืื ืืึธื ื ืืฉื ืจืขืงืึธืืขื ืืืจื ืื ืกืืึธืืื ื ืขืืง ืืืืฃ ืื ืืขืืืข ืืืฉืื ืขื ืืื ืคึผืึทืืจืึธื ื ืืื ืคึผืึธืกืืืจืขืกืงื ืืืขื ืืืื ืืืื, ืืืืึทื ืืืกืง ืืึทืกืข ืืื ืืืืขืจ ืืืืืืืง ืคึฟืึทืจ ืขืืง. ืึธืืขืจ ืคึฟืึทืจ ืืืืืื ืืงืจืืื ืฆืืืขืงื, ืืืจ ืืืขืื ืืึธื ืืึธืก.
ืืึธืืืจ ืื ืกืืึทืืืจื ืขืืง.
#!/bin/bash
apt-get update
apt-get install etcdืืืื ืืื ืืึทืื ืฆื /etc/default/etcd ืืขืงืข
[ืืืืืืื]
ETCD_NAME=ืืึทืืึทื ืึธืืข1 # ืืึธืกืื ืึทืืข ืคืื โโืืืื ืืึทืฉืื
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ืึทืืข IP ืึทืืจืขืกืขืก ืืึธื ืืืื ืืืืืืง. ืืืกืืขืจ ืืึทื ืงืืงื , ืงืืืขื ื ืขืืง ืืึธื ืืืื ืืึทืฉืืืื ืฆื ืื IP ืึทืืจืขืก ืคืื ืืึธืกื
ETCD_LISTEN_PEER_URLS="ยป # ืึทืืจืขืก ืคืื ืืืื ืืึทืฉืื
ETCD_LISTEN_CLIENT_URLS="ยป # ืึทืืจืขืก ืคืื ืืืื ืืึทืฉืื
[ืงื ืืื]
ETCD_INITIAL_ADVERTISE_PEER_URLS="ยป # ืึทืืจืขืก ืคืื ืืืื ืืึทืฉืื
ETCD_INITIAL_CLUSTER=ยปืืึทืืึทื ืึธืืข1=ยป # ืึทืืจืขืกืขืก ืคืื ืึทืืข ืืืฉืื ืขื ืืื ืื ืขืืง ืงื ืืื
ETCD_INITIAL_CLUSTER_STATE = "ื ืืึท"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-1โณ
ETCD_ADVERTISE_CLIENT_URLS="ยป # ืึทืืจืขืก ืคืื ืืืื ืืึทืฉืื
ืืืกืคืืจื ืืขื ืืึทืคึฟืขื
systemctl restart etcdPostgreSQL 9.6 + ืฉืืืฆื
ืืขืจ ืขืจืฉืืขืจ ืืึทื ืืืจ ืืึทืจืคึฟื ืฆื ืืึธื ืืื ืฉืืขืื ืึทืจืืืฃ ืืจืื ืืืืจืืืึทื ืืืฉืื ืขื ืฆื ืื ืกืืึทืืืจื ืื ื ืืืืืง ืืืืืืืืืจื ืืืืฃ ืืื. ื ืึธื ืื ืกืืึธืืื ื ืื ืืืฉืื ืขื, ืืืื ืืืจ ื ืึธืืคืึธืืื ืืืื ืืืืึธืจืืึทื, ืืืจ ืงืขื ืขื ืืืืคื ืืขื ืคึผืฉืื ืฉืจืืคื ืืืึธืก ืืืขื (ืึผืืขื) ืืึธื ืึทืืฅ ืคึฟืึทืจ ืืืจ. ืืืืคื ืืื ืืืึธืจืฆื.
ืืืืข ืืึธื ืึทื ืื ืฉืจืืคื ื ืืฆื PostgreSQL ืืืขืจืกืืข 9.6, ืืึธืก ืืื ืจืขืื ืฆื ืืขืจ ืื ืขืจืืขื ืจืขืงืืืืจืขืืขื ืฅ ืคืื ืืื ืืืขืจ ืคืืจืืข. ืื ืืืืืื ื ืืื ื ืืฉื ืืขืกืืขื ืืืืฃ ืื ืืขืจืข ืืืขืจืกืืขืก ืคืื PostgreSQL.
#!/bin/bash
apt-get install gnupg -y
echo "deb http://apt.postgresql.org/pub/repos/apt/ buster-pgdg main" >> /etc/apt/sources.list
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
apt-get update
apt-get install postgresql-9.6 python3-pip python3-dev libpq-dev -y
systemctl stop postgresql
pip3 install --upgrade pip
pip install psycopg2
pip install patroni[etcd]
echo "
[Unit]
Description=Runners to orchestrate a high-availability PostgreSQL
After=syslog.target network.target
[Service]
Type=simple
User=postgres
Group=postgres
ExecStart=/usr/local/bin/patroni /etc/patroni.yml
KillMode=process
TimeoutSec=30
Restart=no
[Install]
WantedBy=multi-user.targ
" > /etc/systemd/system/patroni.service
mkdir -p /data/patroni
chown postgres:postgres /data/patroni
chmod 700 /data/patroniะฟะพ
touch /etc/patroni.ymlืืขืจื ืึธื, ืืื ืื /etc/patroni.yml ืืขืงืข ืืืจ ื ืึธืจ ืืืฉืืคื, ืืืจ ืืึทืจืคึฟื ืฆื ืฉืืขืื ืื ืคืืืืขื ืืข ืืื ืืึทืื, ืคืื ืงืืจืก ืืฉืึทื ืืื ื ืื IP ืึทืืจืขืกืขืก ืืื ืึทืืข ืขืจืืขืจ ืฆื ืื ืึทืืจืขืกืขืก ืืืึธืก ืืืจ ื ืืฆื.
ืืึทืฆืึธืื ืืคืืขืจืงืืึทืืงืืึทื ืฆื ืื ืืึทืืขืจืงืื ืืขื ืืื ืืขื ืึทืจืืืงื. ืืืืฉื ืื ืึทืืจืขืกืขืก ืฆื ืืืื ืืืืืขื ืข ืืืืฃ ืืขืืขืจ ืืึทืฉืื ืืื ืืขื ืงื ืืื.
/etc/patroni.yml
scope: pgsql # ะดะพะปะถะฝะพ ะฑััั ะพะดะธะฝะฐะบะพะฒัะผ ะฝะฐ ะฒัะตั
ะฝะพะดะฐั
namespace: /cluster/ # ะดะพะปะถะฝะพ ะฑััั ะพะดะธะฝะฐะบะพะฒัะผ ะฝะฐ ะฒัะตั
ะฝะพะดะฐั
name: postgres1 # ะดะพะปะถะฝะพ ะฑััั ัะฐะทะฝัะผ ะฝะฐ ะฒัะตั
ะฝะพะดะฐั
restapi:
listen: 192.168.0.143:8008 # ะฐะดัะตั ัะพะน ะฝะพะดั, ะฒ ะบะพัะพัะพะน ะฝะฐั
ะพะดะธััั ััะพั ัะฐะนะป
connect_address: 192.168.0.143:8008 # ะฐะดัะตั ัะพะน ะฝะพะดั, ะฒ ะบะพัะพัะพะน ะฝะฐั
ะพะดะธััั ััะพั ัะฐะนะป
etcd:
hosts: 192.168.0.143:2379,192.168.0.144:2379,192.168.0.145:2379 # ะฟะตัะตัะธัะปะธัะต ะทะดะตัั ะฒัะต ะฒะฐัะธ ะฝะพะดั, ะฒ ัะปััะฐะต ะตัะปะธ ะฒั ัััะฐะฝะฐะฒะปะธะฒะฐะตัะต etcd ะฝะฐ ะฝะธั
ะถะต
# this section (bootstrap) will be written into Etcd:/<namespace>/<scope>/config after initializing new cluster
# and all other cluster members will use it as a `global configuration`
bootstrap:
dcs:
ttl: 100
loop_wait: 10
retry_timeout: 10
maximum_lag_on_failover: 1048576
postgresql:
use_pg_rewind: true
use_slots: true
parameters:
wal_level: replica
hot_standby: "on"
wal_keep_segments: 5120
max_wal_senders: 5
max_replication_slots: 5
checkpoint_timeout: 30
initdb:
- encoding: UTF8
- data-checksums
- locale: en_US.UTF8
# init pg_hba.conf ะดะพะปะถะตะฝ ัะพะดะตัะถะฐัั ะฐะดัะตัะฐ ะะกะะฅ ะผะฐัะธะฝ, ะธัะฟะพะปัะทัะตะผัั
ะฒ ะบะปะฐััะตัะต
pg_hba:
- host replication postgres ::1/128 md5
- host replication postgres 127.0.0.1/8 md5
- host replication postgres 192.168.0.143/24 md5
- host replication postgres 192.168.0.144/24 md5
- host replication postgres 192.168.0.145/24 md5
- host all all 0.0.0.0/0 md5
users:
admin:
password: admin
options:
- createrole
- createdb
postgresql:
listen: 192.168.0.143:5432 # ะฐะดัะตั ัะพะน ะฝะพะดั, ะฒ ะบะพัะพัะพะน ะฝะฐั
ะพะดะธััั ััะพั ัะฐะนะป
connect_address: 192.168.0.143:5432 # ะฐะดัะตั ัะพะน ะฝะพะดั, ะฒ ะบะพัะพัะพะน ะฝะฐั
ะพะดะธััั ััะพั ัะฐะนะป
data_dir: /data/patroni # ััั ะดะธัะตะบัะพัะธั ัะพะทะดะฐัั ัะบัะธะฟั, ะพะฟะธัะฐะฝะฝัะน ะฒััะต ะธ ัััะฐะฝะพะฒะธั ะฝัะถะฝัะต ะฟัะฐะฒะฐ
bin_dir: /usr/lib/postgresql/9.6/bin # ัะบะฐะถะธัะต ะฟััั ะดะพ ะฒะฐัะตะน ะดะธัะตะบัะพัะธะธ ั postgresql
pgpass: /tmp/pgpass
authentication:
replication:
username: postgres
password: postgres
superuser:
username: postgres
password: postgres
create_replica_methods:
basebackup:
checkpoint: 'fast'
parameters:
unix_socket_directories: '.'
tags:
nofailover: false
noloadbalance: false
clonefrom: false
nosync: falseืืขืจ ืฉืจืืคื ืืืื ืืืื ืืืืคื ืืืืฃ ืึทืืข ืืจืื ืืืฉืื ืขื ืคืื ืืขื ืงื ืืื, ืืื ืื ืืืืื ืงืึทื ืคืืืืขืจืืืฉืึทื ืืืื ืืืื ืืืื ืืขืฉืืขืื ืืื ืื /etc/patroni.yml ืืขืงืข ืืืืฃ ืึทืืข ืืืฉืื ืขื.
ืึทืืึธื ืืืจ ืืึธืื ืืืจืืืขืงืึธืื ืื ืึทืคึผืขืจืืืฉืึทื ื ืืืืฃ ืึทืืข ืืืฉืื ืขื ืืื ืืขื ืงื ืืื, ืืืืคื ืื ืคืืืืขื ืืข ืืึทืคึฟืขื ืืืืฃ ืงืืื ืคืื ืืื
systemctl start patroni
systemctl start postgresqlืืืึทืจืื ืืืขืื 30 ืกืขืงืื ืืขืก, ืืื ืืืืคื ืืขื ืืึทืคึฟืขื ืืืืฃ ืื ืจืืขื ืืืฉืื ืขื ืืื ืืขื ืงื ืืื.
HAproxy
ืืืจ ื ืืฆื ืื ืืืื ืืขืจืืขื HAproxy ืฆื ืฆืืฉืืขืื ืึท ืืืื ืคึผืึธืืืฆืืข. ืืขืจ ืืขื ืกืขืจืืืขืจ ืืืขื ืฉืืขื ืืืง ืืืื ืืืจืขืืืืื ืืืืฃ ืื ืึทืืจืขืก ืคืื ืื ืืึทืฉืื ืืืืฃ ืืืึธืก HAproxy ืืื ืืืคึผืืืื.
ืึผืื ื ืืฉื ืฆื ืืึทืื ืื ืืึทืฉืื ืืื HAproxy ืึท ืืืื ืคืื ื ืคืื ืืืจืืคืึทื, ืืืจ ืืืขืื ืงืึทืืขืจ ืขืก ืืื ืึท ืืึธืงืงืขืจ ืงืึทื ืืืื ืขืจ; ืืื ืืขืจ ืฆืืงืื ืคึฟื ืขืก ืงืขื ืขื ืืืื ืืึธื ืืฉื ืืื ืื ืง8 ืก ืงื ืืื ืืื ืืึทืื ืืื ืืืขืจ ืคืึทืืืึธืืืขืจ ืงื ืืื ืืคืืื ืืขืจ ืคืึทืจืืึธืืืขื.
ืฉืึทืคึฟื ืึท ืืืขืืืืืึทืืขืจ ืืื ืืืจ ืงืขื ืขื ืงืจืึธื ืฆืืืื ืืขืงืขืก - Dockerfile ืืื haproxy.cfg. ืืืื ืฆื ืืื.
dockerfile
FROM ubuntu:latest
RUN apt-get update
&& apt-get install -y haproxy rsyslog
&& rm -rf /var/lib/apt/lists/*
RUN mkdir /run/haproxy
COPY haproxy.cfg /etc/haproxy/haproxy.cfg
CMD haproxy -f /etc/haproxy/haproxy.cfg && tail -F /var/log/haproxy.logืืืื ืึธืคึผืืขืืื, ืื ืืขืฆืืข ืืจืื ืฉืืจืืช ืคืื ืื haproxy.cfg ืืขืงืข ืืึธื ืจืฉืืื ืื ืึทืืจืขืกืขืก ืคืื ืืืื ืืืฉืื ืขื. HAproxy ืืืขื ืงืึธื ืืึทืงื Patroni, ืืื ืื ืืืืคึผ ืืขืืขืจื ืืขืจ ืืขื ืกืขืจืืืขืจ ืืืขื ืฉืืขื ืืืง ืฆืืจืืงืงืืืขื 200, ืืื ืื ืจืขืคึผืืืงืข ืืืขื ืฉืืขื ืืืง ืฆืืจืืงืงืืืขื 503.
haproxy.cfg
global
maxconn 100
defaults
log global
mode tcp
retries 2
timeout client 30m
timeout connect 4s
timeout server 30m
timeout check 5s
listen stats
mode http
bind *:7000
stats enable
stats uri /
listen postgres
bind *:5000
option httpchk
http-check expect status 200
default-server inter 3s fall 3 rise 2 on-marked-down shutdown-sessions
server postgresql1 192.168.0.143:5432 maxconn 100 check port 8008
server postgresql2 192.168.0.144:5432 maxconn 100 check port 8008
server postgresql3 192.168.0.145:5432 maxconn 100 check port 8008
ืืื ืื ืืืขืืืืืึทืืขืจ ืืื ืืืึธืก ืืืืืข ืคืื โโโโืืื ืืืขืจ ืืขืงืขืก "ืืืื," ืืึธืื ืืื ืื ืืืกืคืืจื ืกืึทืงืืืขื ืืฉืึทืื ืื ืงืึทืืึทื ืื ืคึฟืึทืจ ืคึผืึทืงืื ื ืืขื ืงืึทื ืืืื ืขืจ, ืืื ืงืึทืืขืจ ืขืก ืืื ืคืึธืจืืืขืจืืื ื ืื ื ืืืืืง ืคึผืึธืจืฅ:
docker build -t my-haproxy .
docker run -d -p5000:5000 -p7000:7000 my-haproxy ืืืฆื, ืืืจื ืขืคื ืื ืึทืืจืขืก ืคืื ืืืื ืืึทืฉืื ืืื HAproxy ืืื ืืขื ืืืขืืขืจืขืจ ืืื ืกืคึผืขืฆืืคืืฆืืจื ืคึผืึธืจื 7000, ืืืจ ืืืขื ืืขื ืกืืึทืืืกืืืง ืืืืฃ ืืืื ืงื ืืื.
ืืขืจ ืกืขืจืืืืจืขืจ ืืืึธืก ืืื ืืขืจ ืืขื ืืืขื ืืืื ืืื ืื UP ืฉืืึทื, ืืื ืื ืจืขืคึผืืึทืงืึทื ืืืขื ืืืื ืืื ืื ืึทืจืึธืคึผ ืฉืืึทื. ืืึธืก ืืื ื ืึธืจืืึทื, ืืื ืคืึทืงื ืืื ืึทืจืืขืื, ืึธืืขืจ ืืื ืืขืจืฉืืึทื ืขื ืึทืืื ืืืืึทื ืืื ืฆืืจืืงืงืืืขื 503 ืคึฟืึทืจ ืจืืงืืืขืก ืคืื HAproxy. ืืึธืก ืึทืืึทืื ืืื ืื ืฆื ืฉืืขื ืืืง ืืืืกื ืคึผืื ืงื ืืืึธืก ืคืื ืื ืืจืื ืกืขืจืืืขืจืก ืืื ืื ืงืจืึทื ื ืืขื.
ืกืึธืฃ
ืื ืืืกื ืืขืจืืื! ืืื ืืืืื 30 ืืื ืื ืืืจ ืืึธืื ืืืคึผืืืื ืึท ืืืกืืขืฆืืืื ื ืฉืืื-ืืึธืืขืจืึทื ื ืืื ืืืื-ืคืึธืจืฉืืขืืื ื ืืึทืืึทืืืืก ืงื ืืื ืืื ืกืืจืืืื ื ืจืขืคึผืืึทืงืืืฉืึทื ืืื ืึธืืึทืืึทืืืง ืคืึทืืืึทืง. ืืืื ืืืจ ืืขื ื ืคึผืืึทื ืืจืื ื ืฆื ื ืืฆื ืืขื ืืืืืื ื, ืืฉืขืง ืืืืก , ืืื ืกืคึผืขืฆืืขื ืืื ืืืื ืืืื ืืืขืื ืื ืคึผืึทืืจืึธื ืืงืื ื ืืฆื, ืืืึธืก ืืื ืืึทืงืืืขื ืึทืงืกืขืก ืฆื ืึธื ืคืืจืื ื ืืืื ืงื ืืื.
ืืึทืื - ืืึธืื!
ืืงืืจ: www.habr.com