From 58951873b23624332bde25fa88099e02203277a7 Mon Sep 17 00:00:00 2001
From: Quentin Dufour <quentin@deuxfleurs.fr>
Date: Wed, 1 Mar 2023 21:18:40 +0100
Subject: reorg operations

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 content/operations/stolon.md | 97 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 content/operations/stolon.md

(limited to 'content/operations/stolon.md')

diff --git a/content/operations/stolon.md b/content/operations/stolon.md
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+---
+title: "Stolon"
+description: "Comment déployer Stolon"
+date: 2022-12-22
+dateCreated: 2022-12-22
+weight: 11
+extra:
+  parent: 'operations/deployer.md'
+---
+
+Spawn container:
+
+```bash
+docker run \
+  -ti --rm \
+  --name stolon-config \
+  --user root \
+  -v /var/lib/consul/pki/:/certs \
+  superboum/amd64_postgres:v11
+```
+
+
+Init with:
+
+```
+stolonctl \
+  --cluster-name chelidoine \
+  --store-backend=consul \
+  --store-endpoints https://consul.service.prod.consul:8501 \
+  --store-ca-file /certs/consul-ca.crt \
+  --store-cert-file /certs/consul2022-client.crt \
+  --store-key /certs/consul2022-client.key \
+  init \
+  '{ "initMode": "new",
+     "usePgrewind" : true,
+     "proxyTimeout" : "120s",
+     "pgHBA": [ 
+       "host all postgres all md5", 
+       "host replication replicator all md5", 
+       "host all all all ldap ldapserver=bottin.service.prod.consul ldapbasedn=\"ou=users,dc=deuxfleurs, dc=fr\" ldapbinddn=\"<bind_dn>\" ldapbindpasswd=\"<bind_pwd>\" ldapsearchattribute=\"cn\"" 
+      ] 
+   }'
+
+```
+
+Then set appropriate permission on host:
+
+```
+mkdir -p /mnt/{ssd,storage}/postgres/
+chown -R 999:999 /mnt/{ssd,storage}/postgres/
+```
+
+(102 is the id of the postgres user used in Docker)
+It might be improved by staying with root, then chmoding in an entrypoint and finally switching to user 102 before executing user's command.
+Moreover it would enable the usage of the user namespace that shift the UIDs.
+
+
+
+## Upgrading the cluster
+
+To retrieve the current stolon config:
+
+```
+stolonctl spec --cluster-name chelidoine --store-backend consul --store-ca-file ... --store-cert-file ... --store-endpoints https://consul.service.prod.consul:8501
+```
+
+The important part for the LDAP:
+
+```
+{
+	"pgHBA": [
+		"host all postgres all md5",
+		"host replication replicator all md5",
+		"host all all all ldap ldapserver=bottin.service.2.cluster.deuxfleurs.fr ldapbasedn=\"ou=users,dc=deuxfleurs,dc=fr\" ldapbinddn=\"cn=admin,dc=deuxfleurs,dc=fr\" ldapbindpasswd=\"<REDACTED>\" ldapsearchattribute=\"cn\""
+	]
+}
+```
+
+Once a patch is writen:
+
+```
+stolonctl --cluster-name pissenlit --store-backend consul --store-endpoints http://consul.service.2.cluster.deuxfleurs.fr:8500 update --patch -f /tmp/patch.json
+```
+
+## Log
+
+- 2020-12-18 Activate pg\_rewind in stolon
+
+```
+stolonctl --cluster-name pissenlit --store-backend consul --store-endpoints http://consul.service.2.cluster.deuxfleurs.fr:8500 update --patch '{ "usePgrewind" : true }'
+```
+
+- 2021-03-14 Increase proxy timeout to cope with consul latency spikes
+
+```
+stolonctl --cluster-name pissenlit --store-backend consul --store-endpoints http://consul.service.2.cluster.deuxfleurs.fr:8500 update --patch '{ "proxyTimeout" : "120s" }'
+```
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