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Thu, 18 Dec 2025 02:12:56 +0000 From: Koshino Taiki To: "pgpool-general@lists.postgresql.org" Subject: Re: pcp_promote_node and watchdog Thread-Topic: pcp_promote_node and watchdog Thread-Index: AQHcb3i6YX/XE+khrEmt/CPP5e5967Ump35W Date: Thu, 18 Dec 2025 02:12:56 +0000 Message-ID: References: In-Reply-To: Accept-Language: ja-JP, en-US Content-Language: ja-JP X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=sraoss.co.jp; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: TY3P286MB2918:EE_|TY7P286MB7027:EE_ x-ms-office365-filtering-correlation-id: 36aca247-d404-4173-099d-08de3ddaf5cc x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0;ARA:13230040|376014|1800799024|366016|13003099007|38070700021|8096899003|7053199007; x-microsoft-antispam-message-info: =?gb2312?B?WkpLQ3ZLc0t5aXo1MlpwQXdmalNOcTZqTUFmWjkzSGJHWTZtK2gzS09JVTU5?= =?gb2312?B?ZGl3RDYycnRzZWplVlI5Rnl6dVpBa2ZkR3ByeTZWM3pWS3hBdjd1SStHTFZW?= =?gb2312?B?alJ2MXg3UTV3c2liRmNSVmdQdmlOSUdLTDZsZUxwZjRtOEJla3ZoL1VaUnNz?= =?gb2312?B?K1J0djdZek5UTWQ3L2JmTXJyRnhNcG52Q01xOWVUY0p3TzA2My9Qcm9kTFRs?= =?gb2312?B?UXVhdjRZRXdlWTBwOHc3LzJYOTRiYnlDbGR6cHdTR1JjYUM5Z3ExcS9tYUM0?= =?gb2312?B?bEpRemQyZGV6OVVldlVYdExxU2JCRTJXVmxzaEJoNHBOUG93ODd1UlllVUxp?= =?gb2312?B?RXRrTVpPcnVXMnFrSGRla3o0TEY2dUdmZUZGZThJRFhPQURzQ3R6UDR1cG4w?= =?gb2312?B?SW0weVdJTmRUVVVFVjBwcnR6ano3aXF5QVc1ZUZzdnUzWGEzMVNFTlVqTjNI?= =?gb2312?B?VXpFUjNLcUVHd2ZZTkpORlJldEhEdkNEY0pJdkM4WW1CRG5xVFF6aHdiM2lE?= =?gb2312?B?NWNKcFVRcGhBYzlQT1gxRnBaUzJkZ0NkWlNyeTdwUHR4QkxpcUVVZmx4aDhR?= =?gb2312?B?R3F1cDZidXhLVkVaem41NXd6d3ZtNDB2UUhLOU1DTHFhNi92c0NGOEsxb3ZO?= =?gb2312?B?UHh1dGRWQ2hTY05JalJnWVFFVko3TzBESmdzK2p4TWdHM1Y5dkJieDJwUnVP?= =?gb2312?B?ay9EMVgxNUJGMk1odTZUMTNMWUFaNHgxaXY5Q0h3Nng2QXE1UUZXNHlqTHdU?= =?gb2312?B?cnE2bStUbFhxK2NQSGNSclNWRGdPT2dYRzZkT2RwMU1QVjh0MlVkMUF1a25w?= =?gb2312?B?cFhWcDU5TzVLcXFsRjVRSjRIUTdZaC82SmdZYi9zQjJTanM4cDV4QmsxREo5?= =?gb2312?B?Rm5xZ2RwR3RBeWc4OXl0UXY1MGEveEtzbUFlQTVmd0Y1aTRFR2F3OTVLbWRC?= =?gb2312?B?YmpyU2gybjFON2I2LzlrenN4RE9SQlBObWhKVFpsQWhkbmlZaUoxZDE1Snp2?= =?gb2312?B?eUFZbC9tZnM3bS9MQlZ1MUt4d3RXN3pUdjVPT29UZ3YycE11ZlQ1d3dDL0FU?= =?gb2312?B?UmNTT2ZZSE5zOHRkUHZsLzdxQWtITS9IRlE3Q0R3aDFqMXBZZmN4WEJna24y?= =?gb2312?B?UlZ6d2Y1dGFQVG1HeXRqWVpvbDlGQmFtMGdOcFNpa3BLN09PVTAyVnB3bWRC?= =?gb2312?B?L05mOTZjdHY0Uk5NN3hjbGs4YzkzajJqN3NySmZrK3NvQzJBaHp5dEVLYXpG?= =?gb2312?B?NS8wZXNTbjNPZVNoUUVoMmZVTklLWkUveEN5UWNMRnpqUjFtTUhyVjV5SE8z?= =?gb2312?B?Q3c0WUNrQnNVaTBiK21RZjdYd1Y0dWl3V291d3NPMGcrQ01KdzRJalV1TlI4?= =?gb2312?B?bjc5aFVEb2Y3TkFaUzYwMWw0Mi9vb0VNY1V2L3FrTnl1QXQzZTlOUVdQTDFj?= =?gb2312?B?UXc3eFRROXZIRlZoWkg0QUFscklzbktMQWV3b2dCRlRvVFpHbUVPYktqNitV?= =?gb2312?B?NTFxS1lVclJJVFFtM0tJODJTd2hmKzNRY2tZby9FNDYvbjYwczRFY3JmWk9t?= =?gb2312?B?dUs1dDYyYjQzNTIyQnlXQ0R1TVBtS0pVNVRTRDBRMys3bzQxaHd2QzA2SlIy?= =?gb2312?B?RjVYQ1hoYmtyL1M1SGUzaDY3V2U4SWVlL1hBeEdSMDhEN04rYlJ5T1g4bnVI?= =?gb2312?B?Q25oK2hkOUhsaTJvdTlxZUtrMWRTQzNSQjVmRUhWbVpNVUlvNWY1OTQzTXR4?= =?gb2312?B?Uk1ZV0pZM0dCSG56Tmc4cFNHSUZPUjRxdHFaY3dkV3lMNzJBaGlJTzBHS3Nv?= =?gb2312?B?YXhpS2FaU1docXlDWkVpOTlZbWt6VnlpbEQrRnJYQkExQm1YVWwrTi9CSmRp?= =?gb2312?B?aWh1TjJFcUNnMnpVQlR2L0NxTUZKUnJ4ZGlTcHZxc0xvTms2Wk1IbFcrSDBG?= =?gb2312?Q?Am8su4u4sWymjbywxBT7UYveBh5kM4CB?= x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:zh-cn;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:TY3P286MB2918.JPNP286.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230040)(376014)(1800799024)(366016)(13003099007)(38070700021)(8096899003)(7053199007);DIR:OUT;SFP:1102; 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boundary="_000_TY3P286MB29186F4A06F50409825316C294A8ATY3P286MB2918JPNP_" MIME-Version: 1.0 X-OriginatorOrg: sraoss.co.jp X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: TY3P286MB2918.JPNP286.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-Network-Message-Id: 36aca247-d404-4173-099d-08de3ddaf5cc X-MS-Exchange-CrossTenant-originalarrivaltime: 18 Dec 2025 02:12:56.8855 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 75db6c32-352e-4063-ae79-cafb8623f6db X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: IAkCgYZIGRuqLlrXHucr/iO9yT7gfkQ9x0UTivUrF17A/pUqdOjg4ok+miwETtT2/XNHInD0MXL79qwcJkvWfg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: TY7P286MB7027 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --_000_TY3P286MB29186F4A06F50409825316C294A8ATY3P286MB2918JPNP_ Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 SGksDQoNCnBjcF9wcm9tb3RlX25vZGUgLS1zd2l0Y2hvdmVyIGRvZXMgbm90IGNoYW5nZSB0aGUg d2F0Y2hkb2cgc3RhdHVzIGFuZCBkb2VzIG5vdCBtb3ZlIHRoZSB3YXRjaGRvZyB2aXJ0dWFsIElQ LiBUaGlzIGlzIGV4cGVjdGVkIGJlaGF2aW9yLg0KcGNwX3Byb21vdGVfbm9kZSBvbmx5IHN3aXRj aGVzIFBvc3RncmVTUUwgYmFja2VuZCByb2xlcyBiZXR3ZWVuIHByaW1hcnkgYW5kIHN0YW5kYnku DQoNCkluIFBncG9vbC1JSSwgdGhlIFZJUCBpcyBhc3NvY2lhdGVkIHdpdGggdGhlIFBncG9vbC1J SSBsZWFkZXIsIG5vdCB3aXRoIHRoZSBQb3N0Z3JlU1FMIHByaW1hcnkuIFRoZXJlZm9yZSwgZXZl biBpZiB5b3UgcGVyZm9ybSBhIFBvc3RncmVTUUwgc3dpdGNob3ZlciB1c2luZyBwY3BfcHJvbW90 ZV9ub2RlIGNvbW1hbmRzLCBpdCBpcyBub3QgcG9zc2libGUgdG8gbWFrZSB0aGUgVklQIHRvIG1p Z3JhdGUgdG8gdGhlIHByb21vdGVkIHByaW1hcnkuDQoNCkJlc3QgcmVnYXJkcywNCg0KDQpUYWlr aSBLb3NoaW5vPGtvc2hpbm9Ac3Jhb3NzLmNvLmpwPg0KU1JBIE9TUyBLLksuDQpURUw6IDAzLTU5 NzktMjcwMSBGQVg6IDAzLTU5NzktMjcwMg0KVVJMOiBodHRwczovL3d3dy5zcmFvc3MuY28uanAv DQoNCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQqy7rP2yMs6IEx1Y2EgRmVycmFy aSA8Zmx1Y2ExOTc4QGdtYWlsLmNvbT4NCsvN0MXI1ZVyOiAyMDI1xOoxMtTCMTjI1SAyOjE0DQrN 8M/IOiBwZ3Bvb2wtZ2VuZXJhbEBsaXN0cy5wb3N0Z3Jlc3FsLm9yZyA8cGdwb29sLWdlbmVyYWxA bGlzdHMucG9zdGdyZXNxbC5vcmc+DQq8/sP7OiBwY3BfcHJvbW90ZV9ub2RlIGFuZCB3YXRjaGRv Zw0KDQpIaSBhbGwsDQpJIGRvbid0IHVuZGVyc3RhbmQgaWYgdXNpbmcgcGNwX3Byb21vdGVfbm9k ZSAtLXN3aXRjaG92ZXINCig8aHR0cHM6Ly93d3cucGdwb29sLm5ldC9kb2NzLzQ3L2VuL2h0bWwv cGNwLXByb21vdGUtbm9kZS5odG1sPikNCmltcGxpZXMgYWxzbyBhIHdhdGNoZG9nIHN0YXR1cyBj aGFuZ2UsIGFzIGl0IHNlZW1zIHRvIG1lIHRoaXMgaXMgbm90DQp0aGUgY2FzZS4gQXNzdW1pbmcg SSBoYXZlIGEgY3VycmVudCBwaW1yYXJ5IGFuZCBtYWluIG5vZGUsIGFuZCBJIHdhbnQNCnRvIHBy b21vdGUgYW5vdGhlciBub2RlIGluIHRoZSBjbHVzdGVyLCB3aGF0IGlzIHRoZSBjb3JyZWN0IHdh eSB0bw0KbWFrZSB0aGUgd2F0Y2hkb2cgaXAgdG8gbWlncmF0ZSB0byB0aGUgcHJvbW90ZWQgcHJp bWFyeT8NCg0KVGhhbmtzLA0KTHVjYQ0KDQoNCg== --_000_TY3P286MB29186F4A06F50409825316C294A8ATY3P286MB2918JPNP_ Content-Type: text/html; 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Hi,

pcp_promote_node --switchover does not change the watchdog status and does = not move the watchdog virtual IP. This is expected behavior.
pcp_promote_node only switches PostgreSQL backend roles between primary and= standby.

In Pgpool-II, the VIP is associated with the Pgpool-II leader, not with the= PostgreSQL primary. Therefore, even if you perform a PostgreSQL switchover= using pcp_promote_node commands, it is not possible to make the VIP to mig= rate to the promoted primary.

Best regards,


Taiki Koshino<koshino@sraoss.co.jp>
SRA OSS K.K.
TEL: 03-5979-2701 FAX: 03-5979-2702
URL: https://www.sraoss.co.jp/

=B2=EE=B3=F6=C8=CB: Luca Fe= rrari <fluca1978@gmail.com>
=CB=CD=D0=C5=C8=D5=95r: 2025=C4=EA12=D4=C218=C8=D5 2:14
=CD=F0=CF=C8: pgpool-general@lists.postgresql.org <pgpool-general= @lists.postgresql.org>
=BC=FE=C3=FB: pcp_promote_node and watchdog
 
Hi all,
I don't understand if using pcp_promote_node --switchover
(<https://www.pgpool.net/docs/47/en/html/pcp-promote-node.html>) implies also a watchdog status change, as it seems to me this is not
the case. Assuming I have a current pimrary and main node, and I want
to promote another node in the cluster, what is the correct way to
make the watchdog ip to migrate to the promoted primary?

Thanks,
Luca


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