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2.25.1.0-b372

2.25.1.0-b372: [BACKPORT 2.25.1][#24793] yugabyted: Upgrade support for PG15.
@nchandrappa nchandrappa tagged this 03 Mar 16:30 
Summary:
Original commit: 0b7f8840ef86ae32c7fec84a54cd538b11c8f9eb / D41990
# Upgrade Support for PG15

### Stage 1:

- Start a Yugabyted node and load a sample dataset.

```
./bin/yugabyted start --base_dir /mnt/disks/disk2/yugabyted-base-dir

./bin/yugabyted demo connect --base_dir /mnt/disks/disk2/yugabyted-base-dir

./bin/yugabyted upgrade check_version_compatibility
```

### Stage 2:

- Restart the yugabyted node for the upgrade
- First restart will only restart the master process with PG15 version and tserver processes will be started with old version.

```
./bin/yugabyted stop --upgrade true --base_dir /mnt/disks/disk2/yugabyted-base-dir

./bin/yugabyted start --base_dir /mnt/disks/disk2/yugabyted-base-dir

```

### Stage 3:

- Upgrade the ysql catalog and restart the nodes
- during this restart, both master and tserver will be started with PG15 versions.

```

./bin/yugabyted upgrade ysql_catalog --base_dir /mnt/disks/disk2/yugabyted-base-dir

./bin/yugabyted stop --upgrade true --base_dir /mnt/disks/disk2/yugabyted-base-dir

./bin/yugabyted start --base_dir /mnt/disks/disk2/yugabyted-base-dir
```

### Stage 4:

- Finalize the upgrade to PG15 version.

```
./bin/yugabyted upgrade finalize_new_version --base_dir /mnt/disks/disk2/yugabyted-base-dir
```
Jira: DB-13891

Test Plan: Manaul Tests

Reviewers: sgarg-yb, djiang

Reviewed By: sgarg-yb

Subscribers: yugabyted-dev

Differential Revision: https://phorge.dev.yugabyte.com/D42242
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