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Add remote replica support for pg 13,14 (#33)
Signed-off-by: souravbiswassanto <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,210 @@ | ||
| #!/usr/bin/env bash | ||
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| # Copyright AppsCode Inc. and Contributors | ||
| # | ||
| # Licensed under the AppsCode Free Trial License 1.0.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # https://github.com/appscode/licenses/raw/1.0.0/AppsCode-Free-Trial-1.0.0.md | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
|
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| export PASSWORD | ||
| set -eou pipefail | ||
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| echo "Running as Remote Replica" | ||
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| # set password ENV | ||
| export PGPASSWORD=${PRIMARY_PASSWORD:-} | ||
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| # Waiting for running Postgres | ||
| while true; do | ||
| echo "Attempting pg_isready on primary" | ||
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| if [[ "${SOURCE_SSL:-0}" == "ON" ]]; then | ||
| pg_isready --host="$PRIMARY_HOST" -d "sslmode=$SOURCE_SSL_MODE sslrootcert=/tls/certs/remote/ca.crt sslcert=/tls/certs/remote/client.crt sslkey=/tls/certs/remote/client.key" --username=$PRIMARY_USER_NAME --timeout=2 &>/dev/null && break | ||
| else | ||
| pg_isready --host="$PRIMARY_HOST" --username=$PRIMARY_USER_NAME --timeout=2 &>/dev/null && break | ||
| fi | ||
| sleep 2 | ||
| done | ||
|
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| while true; do | ||
| echo "Attempting query on primary" | ||
| if [[ "${SOURCE_SSL:-0}" == "ON" ]]; then | ||
| psql -h "$PRIMARY_HOST" --username=$PRIMARY_USER_NAME -d "dbname=postgres sslmode=$SOURCE_SSL_MODE sslrootcert=/tls/certs/remote/ca.crt sslcert=/tls/certs/remote/client.crt sslkey=/tls/certs/remote/client.key" --command="select now();" &>/dev/null && break | ||
| else | ||
| psql -h "$PRIMARY_HOST" --username=$PRIMARY_USER_NAME -d postgres --no-password --command="select now();" &>/dev/null && break | ||
| fi | ||
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| sleep 2 | ||
| done | ||
|
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| if [[ ! -e "$PGDATA/PG_VERSION" ]]; then | ||
| echo "taking base basebackup..." | ||
| mkdir -p "$PGDATA" | ||
| rm -rf "$PGDATA"/* | ||
| chmod 0700 "$PGDATA" | ||
| if [[ "${SOURCE_SSL:-0}" == "ON" ]]; then | ||
| pg_basebackup -X fetch --pgdata "$PGDATA" --username=$PRIMARY_USER_NAME --progress --host="$PRIMARY_HOST" -d "sslmode=$SOURCE_SSL_MODE sslrootcert=/tls/certs/remote/ca.crt sslcert=/tls/certs/remote/client.crt sslkey=/tls/certs/remote/client.key" | ||
| else | ||
| pg_basebackup -X fetch --no-password --pgdata "$PGDATA" --username=$PRIMARY_USER_NAME --progress --host="$PRIMARY_HOST" | ||
| fi | ||
| fi | ||
|
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| # setup postgresql.conf | ||
| touch /tmp/postgresql.conf | ||
| echo "wal_level = replica" >>/tmp/postgresql.conf | ||
| echo "shared_buffers = $SHARED_BUFFERS" >>/tmp/postgresql.conf | ||
| echo "max_wal_senders = 90" >>/tmp/postgresql.conf # default is 10. value must be less than max_connections minus superuser_reserved_connections. ref: https://www.postgresql.org/docs/11/runtime-config-replication.html#GUC-MAX-WAL-SENDERS | ||
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| # echo "wal_keep_size = 64" >>/tmp/postgresql.conf #it was "wal_keep_segments" in earlier version. changed in version 13 | ||
| if [ ! -z "${WAL_RETAIN_PARAM:-}" ] && [ ! -z "${WAL_RETAIN_AMOUNT:-}" ]; then | ||
| echo "${WAL_RETAIN_PARAM}=${WAL_RETAIN_AMOUNT}" >>/tmp/postgresql.conf | ||
| else | ||
| echo "wal_keep_size = 1024" >>/tmp/postgresql.conf | ||
| fi | ||
| if [[ "$WAL_LIMIT_POLICY" == "ReplicationSlot" ]]; then | ||
| CLEAN_HOSTNAME="${HOSTNAME//[^[:alnum:]]/}" | ||
| echo "primary_slot_name="$CLEAN_HOSTNAME"" >>/tmp/postgresql.conf | ||
| fi | ||
| echo "max_replication_slots = 90" >>/tmp/postgresql.conf | ||
| echo "wal_log_hints = on" >>/tmp/postgresql.conf | ||
|
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| # we are not doing any archiving by default but it's better to have this config in our postgresql.conf file in case of customization. | ||
| echo "archive_mode = always" >>/tmp/postgresql.conf | ||
| echo "archive_command = '/bin/true'" >>/tmp/postgresql.conf | ||
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| echo "shared_preload_libraries = 'pg_stat_statements'" >>/tmp/postgresql.conf | ||
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| if [ "$STANDBY" == "hot" ]; then | ||
| echo "hot_standby = on" >>/tmp/postgresql.conf | ||
| fi | ||
|
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| if [[ "$STREAMING" == "synchronous" ]]; then | ||
| # setup synchronous streaming replication | ||
| echo "synchronous_commit = remote_write" >>/tmp/postgresql.conf | ||
| echo "synchronous_standby_names = '*'" >>/tmp/postgresql.conf | ||
| fi | ||
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| if [[ "${SSL:-0}" == "ON" ]]; then | ||
| echo "ssl = on" >>/tmp/postgresql.conf | ||
|
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| echo "ssl_cert_file = '/tls/certs/server/server.crt'" >>/tmp/postgresql.conf | ||
| echo "ssl_key_file = '/tls/certs/server/server.key'" >>/tmp/postgresql.conf | ||
| echo "ssl_ca_file = '/tls/certs/server/ca.crt'" >>/tmp/postgresql.conf | ||
| fi | ||
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| if [[ "$CLIENT_AUTH_MODE" == "scram" ]]; then | ||
| echo "password_encryption = scram-sha-256" >>/tmp/postgresql.conf | ||
| fi | ||
|
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| # ****************** Recovery config ************************** | ||
| echo "recovery_target_timeline = 'latest'" >>/tmp/postgresql.conf | ||
| # primary_conninfo is used for streaming replication | ||
| if [[ "${SOURCE_SSL:-0}" == "ON" ]]; then | ||
| echo "primary_conninfo = 'application_name=$HOSTNAME host=$PRIMARY_HOST user=$PRIMARY_USER_NAME password=$PRIMARY_PASSWORD sslmode=$SOURCE_SSL_MODE sslrootcert=/tls/certs/remote/ca.crt sslcert=/tls/certs/remote/client.crt sslkey=/tls/certs/remote/client.key'" >>/tmp/postgresql.conf | ||
| else | ||
| echo "primary_conninfo = 'application_name=$HOSTNAME host=$PRIMARY_HOST user=$PRIMARY_USER_NAME password=$PRIMARY_PASSWORD'" >>/tmp/postgresql.conf | ||
| fi | ||
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| echo "promote_trigger_file = '/run_scripts/tmp/pg-failover-trigger'" >>/tmp/postgresql.conf # [ name whose presence ends recovery] | ||
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| cat /run_scripts/role/postgresql.conf >>/tmp/postgresql.conf | ||
| mv /tmp/postgresql.conf "$PGDATA/postgresql.conf" | ||
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| touch "$PGDATA/standby.signal" | ||
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| # setup pg_hba.conf | ||
| touch /tmp/pg_hba.conf | ||
| { echo '#TYPE DATABASE USER ADDRESS METHOD'; } >>tmp/pg_hba.conf | ||
| { echo '# "local" is for Unix domain socket connections only'; } >>tmp/pg_hba.conf | ||
| { echo 'local all all trust'; } >>tmp/pg_hba.conf | ||
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| if [[ "${SSL:-0}" == "ON" ]]; then | ||
| if [[ "$CLIENT_AUTH_MODE" == "cert" ]]; then | ||
| #*******************client auth with client.crt and key************** | ||
|
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| { echo '# IPv4 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all 127.0.0.1/32 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
| { echo '# IPv6 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all ::1/128 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
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| { echo 'local replication all trust'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication all 127.0.0.1/32 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication all ::1/128 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
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| { echo 'hostssl all all 0.0.0.0/0 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication postgres 0.0.0.0/0 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all ::/0 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication postgres ::/0 cert clientcert=verify-full'; } >>tmp/pg_hba.conf | ||
| elif [[ "$CLIENT_AUTH_MODE" == "scram" ]]; then | ||
| { echo '# IPv4 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all 127.0.0.1/32 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo '# IPv6 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all ::1/128 scram-sha-256'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'local replication all trust'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication all 127.0.0.1/32 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication all ::1/128 scram-sha-256'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'hostssl all all 0.0.0.0/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication postgres 0.0.0.0/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all ::/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication postgres ::/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| else | ||
| { echo '# IPv4 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all 127.0.0.1/32 md5'; } >>tmp/pg_hba.conf | ||
| { echo '# IPv6 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all ::1/128 md5'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'local replication all trust'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication all 127.0.0.1/32 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication all ::1/128 md5'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'hostssl all all 0.0.0.0/0 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication postgres 0.0.0.0/0 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl all all ::/0 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'hostssl replication postgres ::/0 md5'; } >>tmp/pg_hba.conf | ||
| fi | ||
|
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||
| else | ||
| if [[ "$CLIENT_AUTH_MODE" == "scram" ]]; then | ||
| { echo '# IPv4 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'host all all 127.0.0.1/32 trust'; } >>tmp/pg_hba.conf | ||
| { echo '# IPv6 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'host all all ::1/128 scram-sha-256'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'local replication all scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication all 127.0.0.1/32 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication all ::1/128 scram-sha-256'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'host all all 0.0.0.0/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication postgres 0.0.0.0/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'host all all ::/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication postgres ::/0 scram-sha-256'; } >>tmp/pg_hba.conf | ||
| else | ||
| { echo '# IPv4 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'host all all 127.0.0.1/32 trust'; } >>tmp/pg_hba.conf | ||
| { echo '# IPv6 local connections:'; } >>tmp/pg_hba.conf | ||
| { echo 'host all all ::1/128 trust'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'local replication all trust'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication all 127.0.0.1/32 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication all ::1/128 md5'; } >>tmp/pg_hba.conf | ||
|
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| { echo 'host all all 0.0.0.0/0 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication postgres 0.0.0.0/0 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'host all all ::/0 md5'; } >>tmp/pg_hba.conf | ||
| { echo 'host replication postgres ::/0 md5'; } >>tmp/pg_hba.conf | ||
| fi | ||
|
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| fi | ||
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| mv /tmp/pg_hba.conf "$PGDATA/pg_hba.conf" | ||
| exec postgres |
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