ืงืจื ืฉืืืื ืฉืืืขืื ืืืฆืื, ืื ืืื ืื ืืกืคืืง ื ืืกืืื ืืคืชื ืืืืฉืืง ืืช ืืคืชืจืื ืืื ืืื. ืืื ืืชืืืชื ืืืืื.
ืื ื ืื ืืืืข ืื ืืงืืฅ', ืืื ืืคืขื ืืื ืืืืข ืืื ืื ื ืืชืืืื ืขื ืืขืืืื ืฉืื ืื ืื ื ืขืืฉื ืืื ืฉืื ืืืจ ืฉืื ืืื ืืืืจืื, ืืืื ืืช ืืืชื ืกืืืื ืืื ืืืืืจ, ืื ืฉืื ืืืจ ืืฃ ืคืขื ืื ืขืืื. ืืื ืื ืืืฉื ืื ืืขื ืืื, ืืื ืืฉื ืชืงืืชื ืืื ืฉืื, ืืืืืชื ืฉืื ื ืืืชืื ืืืจืื ืืฉืื ืืฉืืื ืืกืชืืจ. ืืื ืฉืืืืื ืืขืืื.
ืืืจืืืื ืืืื ืืจื ื
ืืืงืจื ืฉืืืื ืืจื ื ืื ืกืืื ืืืืกืืจ ืืืืจืืืื ืฉืื ืื, ืืืจืืืช, ืฆืขื ืืืจ ืฆืขื ืืืืืื. ืืืงืจื ืืืื ืขืืื ืืคืชื ืคืชืจืื ืืืจืืื ืืื ืืื ื ืืื ืฉื ืืฉืืื PostgreSQL, ืฉืืืจืืฉืืช ืืขืืงืจืืืช ืขืืืจื ืืื ืืืจืืช ืฉืืคืื ืืฉืจืช ืืืืกืืจ ืืื ืืืขืชืงืื ืืืงืฆืื ืืืืืืืืช ืฉื ืจืืจืื ืืืงืจื ืฉื ืฉืจืช ืืืกืืจ. ืืืฉืืื.
ืืฉืื ืื ื ืงืืขื ืขืจืืืช ืืืื ืืืืืืืช ืฉืืื ื ืขืฉื ืฉืืืืฉ:
- PostgreSQL ื-DBMS
ืคืืจืื ื ืืคืชืจืื ืืงืืฅ- ืืื' ืืืืกืื ืืืืืจ ืขืืืจ Patroni
- HAproxy ืืืจืืื ื ืงืืืช ืื ืืกื ืืืช ืืืืฉืืืื ืืืฉืชืืฉืื ืืืกื ืื ืชืื ืื
ืืชืงื ื
ืืชืฉืืืช ืืื - ืื ืืืช ืืฉืืื PostgreSQL ืืืื ืืืืืื ืืืืฆืขืืช Patroni, etcd, HAProxy.
ืื ืืคืขืืืืช ืืืฆืขื ืืืืื ืืช ืืืจืืืืืืืช ืขื ืืขืจืืช ืืืคืขืื Debian 10 ืืืชืงื ืช.
ืืื '
ืื ื ืื ืืืืืฅ ืืืชืงืื ืืช etcd ืืืืชื ืืืื ืืช ืืื ืืืืงืื patroni ื-postgresql, ืืืืืื ืฉืขืืืก ืืืกืง ืืฉืื ืืืื ืขืืืจ etcd. ืืื ืืืืจืืช ืืื ืืืืืช, ืื ืื ื ื ืขืฉื ืืืืืง ืืช ืื.
ืืืื ื ืชืงืื ืืื'.
#!/bin/bash
apt-get update
apt-get install etcd
ืืืกืฃ ืชืืื ืืงืืืฅ /etc/default/etcd
[ืืืจ]
ETCD_NAME=datanode1 # ืฉื ืืืจื ืฉื ืืืืฉื ืฉืื
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ืื ืืชืืืืช ื-IP ืฆืจืืืืช ืืืืืช ืชืงืคืืช. LISTER PEER, ืืงืื ืืื' ืฆืจืืืื ืืืืืช ืืืืืจืื ืืืชืืืช ื-IP ืฉื ืืืืจื
ETCD_LISTEN_PEER_URLS="
ETCD_LISTEN_CLIENT_URLS="
[ืึถืฉืืึผืึนื]
ETCD_INITIAL_ADVERTISE_PEER_URLS="
ETCD_INITIAL_CLUSTER=ยปnode data1=
ETCD_INITIAL_CLUSTER_STATE="ืืืฉ"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster-1"
ETCD_ADVERTISE_CLIENT_URLS="
ืืคืขื ืืช ืืคืงืืื
systemctl restart etcd
PostgreSQL 9.6 + ืคืืจืื ื
ืืืืจ ืืจืืฉืื ืฉืขืืื ืืขืฉืืช ืืื ืืืืืืจ ืฉืืืฉ ืืืื ืืช ืืืจืืืืืืืช ืืื ืืืชืงืื ืขืืืื ืืช ืืชืืื ื ืืืจืืฉื. ืืืืจ ืืชืงื ืช ืืืืื ืืช, ืื ืชืขืงืื ืืืจ ืืืืจืื ืฉืื, ืชืืืื ืืืจืืฅ ืืช ืืกืงืจืืคื ืืคืฉืื ืืื ืฉืืขืฉื (ืืืขื) ืืื ืืฉืืืืื. ืคืืขื ืืฉืืจืฉ.
ืฉืืื ืื ืฉืืกืงืจืืคื ืืฉืชืืฉ ื-PostgreSQL ืืจืกื 9.6, ืื ื ืืืข ืืืืจืืฉืืช ืืคื ืืืืืช ืฉื ืืืืจื ืฉืื ื. ืืคืชืจืื ืื ื ืืืง ืขื ืืจืกืืืช ืืืจืืช ืฉื 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.yml
ืืืืจ ืืื, ืืงืืืฅ /etc/patroni.yml ืฉืืฆืจืช ืื ืขืชื, ืขืืื ืืืงื ืืช ืืชืื ืื ืืืืื, ืืืืื ืืฉื ืืช ืืช ืืชืืืืช ื-IP ืืื ืืืงืืืืช ืืืชืืืืช ืืื ืืชื ืืฉืชืืฉ.
ืฉืืื ืื ืืืขืจืืช ื-yaml ืืื. ืฉื ื ืืช ืืืชืืืืช ืืฉืื ืืื ืืืฉื ืืืฉืืื.
/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: false
ืืฉ ืืืคืขืื ืืช ืืกืงืจืืคื ืืื ืฉืืืฉืช ืืืืื ืืช ืฉื ืืืฉืืื, ืืืฉ ืืืงื ืืช ืืชืฆืืจื ืฉืืขืื ืื ืืงืืืฅ /etc/patroni.yml ืืื ืืืืื ืืช.
ืืืืจ ืืฉืืืช ืคืขืืืืช ืืื ืืื ืืืืฉืืื ืืืฉืืื, ืืคืขื ืืช ืืคืงืืื ืืืื ืืื ืืืช ืืื
systemctl start patroni
systemctl start postgresql
ืืืชื ื-30 ืฉื ืืืช, ืืื ืืคืขื ืืช ืืคืงืืื ืืื ืืืืื ืืช ืื ืืชืจืืช ืืืฉืืื.
HAproxy
ืื ื ืืฉืชืืฉืื ื-HAproxy ืื ืคืื ืืื ืืกืคืง ื ืงืืืช ืื ืืกื ืืืช. ืืฉืจืช ืืจืืฉื ืืืื ืชืืื ืืืื ืืืชืืืช ืฉื ืืืืฉื ืฉืขืืื ืคืจืืกืื HAproxy.
ืืื ืื ืืืคืื ืืช ืืืืื ื ืขื HAproxy ืื ืงืืืช ืืฉื ืืืืืช, ื ืฉืืง ืืืชื ืืงืื ืืืื ืจ Docker; ืืขืชืื ื ืืชื ืืืื ืืืฉืืง ืืืชื ืืืฉืืื ื-K8 ืืืืคืื ืืช ืืฉืืื ืืืฉื ืฉืื ื ืืืืื ืขืื ืืืชืจ.
ืฆืืจ ืกืคืจืืื ืฉืื ืชืืื ืืืืกื ืฉื ื ืงืืฆืื - Dockerfile ื-haproxy.cfg. ืื ืืื.
ืืืงืจืคืื
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.log
ืืืืืจ, ืฉืืืฉ ืืฉืืจืืช ืืืืจืื ืืช ืฉื ืืงืืืฅ haproxy.cfg ืฆืจืืืืช ืืจืฉืื ืืช ืืืชืืืืช ืฉื ืืืืื ืืช ืฉืื. HAproxy ืชืืฆืืจ ืงืฉืจ ืขื Patroni, ืืืืชืจืืช HTTP ืืฉืจืช ืืจืืฉื ืชืืื ืืืืืจ 200, ืืืขืชืง ืชืืื ืืืืืจ 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
ืืืืืชื ื ืืกืคืจืืื ืฉืื ืฉื ื ืืงืืฆืื ืฉืื ื "ืฉืืืืื", ืืืื ื ืืฆืข ืืจืฆืฃ ืืช ืืคืงืืืืช ืืืจืืืช ืืืืื, ืืื ืื ืืืคืขืื ืืืชื ืขื ืืขืืจืช ืืืฆืืืืช ืื ืืืฆืืช:
docker build -t my-haproxy .
docker run -d -p5000:5000 -p7000:7000 my-haproxy
ืืขืช, ืขื ืืื ืคืชืืืช ืืืชืืืช ืฉื ืืืืฉื ืฉืื ืขื HAproxy ืืืคืืคื ืืฆืืื ืืฆืืื 7000, ืชืจืื ื ืชืื ืื ืกืืืืกืืืื ืขื ืืืฉืืื ืฉืื.
ืืฉืจืช ืฉืืื ืืืืกืืจ ืืืื ืืืฆื UP, ืืืขืืชืงืื ืืืื ืืืฆื DOWN. ืื ื ืืจืืื, ืืืขืฉื ืื ืขืืืืื, ืืื ืื ืืืคืืขืื ืื ืืืืืื ืฉืื ืืืืืจืื 503 ืืืงืฉืืช ื-HAproxy. ืื ืืืคืฉืจ ืื ื ืชืืื ืืืขืช ืืืืืง ืื ืืฉืืืฉืช ืืฉืจืชืื ืืื ืืืืกืืจ ืื ืืืื.
ืืกืงื ื
ืืช ืืคืืคืื! ืชืื 30 ืืงืืช ืืืื ืคืจืกืช ืืฉืืื ืืกื ื ืชืื ืื ืืขืืื ืขืืื ืืชืงืืืช ืืืืฆืืขืื ืืืืืื ืขื ืฉืืคืื ืกืืจืืืื ื ื-fallback ืืืืืืื. ืื ืืชื ืืชืื ื ืืืฉืชืืฉ ืืคืชืจืื ืื, ืืืืง
ืืื ืืื!
ืืงืืจ: www.habr.com