Postgres Pro Backup Enterprise : Documentation: 3.0: 2.12. Configuring S3 Connection : Postgres Professional

2.12. Configuring S3 Connection
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2.12. Configuring S3 Connection #

pg_probackup3 supports S3 interface for storing backups. Backup data is transferred to and from S3 without saving it in intermediate locations thus eliminating the need of having a large temporary storage.

Note

S3 is available only when pg_probackup3 is used with Postgres Pro Enterprise.

If you are going to use pg_probackup3 with S3 interface, complete the following steps:

Create a bucket with a unique and meaningful name in the S3 storage for you future backups.
Create ACCESS_KEY and SECRET_ACCESS_KEY tokens to be used for secure connectivity instead of your username and password.
For communication between pg_probackup3 and S3 server, set values of environment variables corresponding to your S3 server. For example:
```
export PG_PROBACKUP_S3_HOST=127.0.0.1
export PG_PROBACKUP_S3_PORT=9000
export PG_PROBACKUP_S3_REGION=ru-msk
export PG_PROBACKUP_S3_BUCKET_NAME=test1
export PG_PROBACKUP_S3_ACCESS_KEY=admin
export PG_PROBACKUP_S3_SECRET_ACCESS_KEY=password
export PG_PROBACKUP_S3_HTTPS=ON
```
Alternatively, you can provide S3 server settings in the configuration file or by using the command-line options. For more details, refer to the --config-file option in the section Common Options and to the section S3 Options.
It makes sense to specify S3 server settings if --s3=minio, as described in the section S3 Options.
The following environment variables can be specified:
PG_PROBACKUP_S3_HOST
Address of the S3 server. Can include the port number, separated by a colon. If the port number is not specified in a host string, the value of PG_PROBACKUP_S3_PORT is assumed. Do not add a colon if the port number is not specified.
For example:
```
export PG_PROBACKUP_S3_PORT=80
export PG_PROBACKUP_S3_HOST="127.0.0.1:9000"
```
In this example, for the “127.0.0.1” address, the port 9000 is explicitly specified and will be used instead of value 80, specified through PG_PROBACKUP_S3_PORT.
PG_PROBACKUP_S3_PORT
The port of the S3 server.
PG_PROBACKUP_S3_REGION
The region of the S3 server. The default value is us-east-1.
PG_PROBACKUP_S3_BUCKET_NAME
The name of the bucket on the S3 server.
PG_PROBACKUP_S3_ACCESS_KEY
PG_PROBACKUP_S3_SECRET_ACCESS_KEY
Secure tokens on the S3 server.
PG_PROBACKUP_S3_HTTPS
The protocol to be used. Possible values:
ON or HTTPS — use HTTPS
Other than ON or HTTPS — use HTTP
PG_PROBACKUP_S3_BUFFER_SIZE
The size of the read/write buffer for communicating with S3, in MiB. The default is 16.
PG_PROBACKUP_S3_RETRIES
The maximum number of attempts to execute an S3 request in case of failures. The default is 3.
PG_PROBACKUP_S3_TIMEOUT
The maximum amount of time to execute an HTTP request to the S3 server, in seconds. The default is 300.
PG_PROBACKUP_S3_IGNORE_CERT_VER
Don't verify the certificate host and peer. The default is OFF.
PG_PROBACKUP_S3_CA_CERTIFICATE
Specify the path to file with trust Certificate Authority (CA) bundle.
PG_PROBACKUP_S3_CA_PATH
Specify the directory with trust CA certificates.
PG_PROBACKUP_S3_CLIENT_CERT
Setup SSL client certificate.
PG_PROBACKUP_S3_CLIENT_KEY
Setup private key file for TLS and SSL client certificate.

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