57 lines
1.9 KiB
Bash
57 lines
1.9 KiB
Bash
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#!/bin/bash
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# DR #5885: This script configures a server for Postgres replication.
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# It must run on all Postgres servers that will replicate or be replicated.
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psql="/awips2/psql/bin/psql"
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db_superuser=awips
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postgres_data_dir=/awips2/data
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cleanup_exit () {
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echo INFO: Cleaning up.
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rm -f ${temp_postgresql_conf}
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rm -f ${temp_hba_conf}
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exit $1
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}
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temp_hba_conf=$(mktemp || cleanup_exit 1)
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temp_postgresql_conf=$(mktemp || cleanup_exit 1)
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if [[ "$(id -u)" -ne 0 ]]; then
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echo ERROR: You need to be root.
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cleanup_exit 1
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fi
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echo "INFO: Creating replication role"
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"${psql}" -v ON_ERROR_STOP=1 --user="${db_superuser}" --db=metadata << EOF || cleanup_exit 1
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begin transaction;
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drop role if exists replication;
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create role replication with replication login password 'replication';
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commit transaction;
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EOF
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grep -Ev "replication" "${postgres_data_dir}/pg_hba.conf" > ${temp_hba_conf}
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cat << EOF >> ${temp_hba_conf} || cleanup_exit 1
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# replication connections
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local replication replication trust
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host replication replication 127.0.0.1/32 md5
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host replication replication 162.0.0.0/8 md5
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host replication replication ::1/128 md5
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EOF
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cat "${postgres_data_dir}/postgresql.conf" \
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| perl -pe 's/^\#?\s*max_wal_senders\s*=.*$/max_wal_senders = 5/g' \
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| perl -pe 's/^\#?\s*wal_keep_segments\s*=.*$/wal_keep_segments = 64/g' \
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| perl -pe 's/^\#?\s*hot_standby\s*=.*$/hot_standby = on/g' \
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| perl -pe 's/^\#?\s*wal_level\s*=.*$/wal_level = hot_standby/g' \
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> ${temp_postgresql_conf} || cleanup_exit 1
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echo INFO: Updating postgresql.conf
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install -T -m 600 -o awips -g fxalpha ${temp_postgresql_conf} "${postgres_data_dir}/postgresql.conf" || cleanup_exit 1
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echo INFO: Updating pg_hba.conf
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install -T -m 600 -o awips -g fxalpha ${temp_hba_conf} "${postgres_data_dir}/pg_hba.conf" || cleanup_exit 1
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echo "INFO: Finished. No errors reported."
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cleanup_exit 0
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