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authorQuentin Dufour <quentin@deuxfleurs.fr>2023-03-01 21:18:40 +0100
committerQuentin Dufour <quentin@deuxfleurs.fr>2023-03-01 21:18:40 +0100
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-+++
-title = "Stolon"
-description = "Comment déployer Stolon"
-date = 2022-12-22
-dateCreated = 2022-12-22
-weight = 11
-+++
-
-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" }'
-```