问在PostgreSQL 10中自动化Zabbix3.4的本地范围分区

EN

# su postgres
postgres@<>:~$ createuser -P -s -e zabbix
postgres@<>:~$ psql
postgres# create database zabbix;
postgres# grant all privileges on database zabbix to zabbix;

zabbix=# CREATE TABLE public.history
(
    itemid bigint NOT NULL,
    clock integer NOT NULL DEFAULT 0,
    value numeric(20,0) NOT NULL DEFAULT (0)::numeric,
    ns integer NOT NULL DEFAULT 0
) PARTITION BY RANGE (clock);

zabbix=# CREATE TABLE public.history_old PARTITION OF public.history
    FOR VALUES FROM (MINVALUE) TO (1522540800);
zabbix=# CREATE TABLE public.history_y2018m04 PARTITION OF public.history
    FOR VALUES FROM (1522540800) TO (1525132800);
zabbix=# CREATE TABLE public.history_y2018m05 PARTITION OF public.history
    FOR VALUES FROM (1525132800) TO (1527811200);

zabbix=# CREATE INDEX ON public.history_old USING btree (itemid, clock);
zabbix=# CREATE INDEX ON public.history_y2018m04 USING btree (itemid, clock);
zabbix=# CREATE INDEX ON public.history_y2018m05 USING btree (itemid, clock);

0 0 1 * * /usr/local/bin/auto_history_tables_monthly.sh | psql -d zabbix

#!/bin/bash

month_diff () {
        year=$1
  month=$2
        delta_month=$3
  x=$((12*$year+10#$month-1))
        x=$((x+$delta_month))
        ry=$((x/12))
        rm=$(((x % 12)+1))
        printf "%02d %02d\n" $ry $rm
}

month_start () {
        year=$1
  month=$2
        date '+%s' -d "$year-$month-01 00:00:00" -u
}

month_end () {
        year=$1
  month=$2
        month_start $(month_diff $year $month 1)
}

# Year using date
current_year=$(date +%Y)
current_month=$(date +%m)

# Math
next_date=$(month_diff $current_year $current_month 1)
next_year=$(echo $next_date|sed 's/ .*//')
next_month=$(echo $next_date|sed 's/.* //')

start=$(month_start $next_date)
end=$(month_end $next_date)

#next_month_table="public.history_y${next_year}m${next_month}"

# Create next month table for history, history_uint, history_str, history_log, history_text
sql="
    CREATE TABLE IF NOT EXISTS public.history_y${next_year}m${next_month} PARTITION OF public.history
      FOR VALUES FROM ($start) TO ($end);
    \nCREATE TABLE IF NOT EXISTS public.history_uint_y${next_year}m${next_month} PARTITION OF public.history_uint
      FOR VALUES FROM ($start) TO ($end);
    \nCREATE TABLE IF NOT EXISTS public.history_str_y${next_year}m${next_month} PARTITION OF public.history_str
      FOR VALUES FROM ($start) TO ($end);
    \nCREATE TABLE IF NOT EXISTS public.history_log_y${next_year}m${next_month} PARTITION OF public.history_log
      FOR VALUES FROM ($start) TO ($end);
    \nCREATE TABLE IF NOT EXISTS public.history_text_y${next_year}m${next_month} PARTITION OF public.history_text
      FOR VALUES FROM ($start) TO ($end);
    \nCREATE INDEX on public.history_y${next_year}m${next_month} USING btree (itemid, clock);
    \nCREATE INDEX on public.history_uint_y${next_year}m${next_month} USING btree (itemid, clock);
    \nCREATE INDEX on public.history_str_y${next_year}m${next_month} USING btree (itemid, clock);
    \nCREATE INDEX on public.history_log_y${next_year}m${next_month} USING btree (itemid, clock);
    \nCREATE INDEX on public.history_text_y${next_year}m${next_month} USING btree (itemid, clock);
    "

echo -e $sql

# Math
prev_date=$(month_diff $current_year $current_month -2)
prev_year=$(echo $prev_date|sed 's/ .*//')
prev_month=$(echo $prev_date|sed 's/.* //')

# Drop last month table for history, history_uint, history_str, history_log, history_text
sql="
    DROP TABLE public.history_y${prev_year}m${prev_month};
    \nDROP TABLE public.history_uint_y${prev_year}m${prev_month};
    \nDROP TABLE public.history_str_y${prev_year}m${prev_month};
    \nDROP TABLE public.history_log_y${prev_year}m${prev_month};
    \nDROP TABLE public.history_text_y${prev_year}m${prev_month};
    "

echo -e $sql