Managed Clickhouse Service

ClickHouse is an open source high-performance and column-oriented SQL database management system (DBMS). It is used for online analytical processing (OLAP).

How to restore backup from S3

Find the snapshot:

restic -r s3:s3.example.org/clickhouse-backups/table_name snapshots

Restore it:

restic -r s3:s3.example.org/clickhouse-backups/table_name restore latest --target /tmp/

For more details, read Restic: Effective Backup from Stdin.

Parameters

Common parameters

Name	Description	Value
`size`	Size of Persistent Volume for data	`10Gi`
`logStorageSize`	Size of Persistent Volume for logs	`2Gi`
`shards`	Number of Clickhouse shards	`1`
`replicas`	Number of Clickhouse replicas	`2`
`storageClass`	StorageClass used to store the data	`""`
`logTTL`	TTL (expiration time) for query_log and query_thread_log	`15`

Configuration parameters

Name	Description	Value
`users`	Users configuration	`{}`

Backup parameters

Name	Description	Value
`backup.enabled`	Enable periodic backups	`false`
`backup.s3Region`	AWS S3 region where backups are stored	`us-east-1`
`backup.s3Bucket`	S3 bucket used for storing backups	`s3.example.org/clickhouse-backups`
`backup.schedule`	Cron schedule for automated backups	`0 2 * * *`
`backup.cleanupStrategy`	Retention strategy for cleaning up old backups	`--keep-last=3 --keep-daily=3 --keep-within-weekly=1m`
`backup.s3AccessKey`	Access key for S3, used for authentication	`oobaiRus9pah8PhohL1ThaeTa4UVa7gu`
`backup.s3SecretKey`	Secret key for S3, used for authentication	`ju3eum4dekeich9ahM1te8waeGai0oog`
`backup.resticPassword`	Password for Restic backup encryption	`ChaXoveekoh6eigh4siesheeda2quai0`
`resources`	Explicit CPU and memory configuration for each ClickHouse replica. When left empty, the preset defined in `resourcesPreset` is applied.	`{}`
`resourcesPreset`	Default sizing preset used when `resources` is omitted. Allowed values: none, nano, micro, small, medium, large, xlarge, 2xlarge.	`small`

Parameter examples and reference

resources and resourcesPreset

resources sets explicit CPU and memory configurations for each replica. When left empty, the preset defined in resourcesPreset is applied.

resources:
  cpu: 4000m
  memory: 4Gi

resourcesPreset sets named CPU and memory configurations for each replica. This setting is ignored if the corresponding resources value is set.

Preset name	CPU	memory
`nano`	`100m`	`128Mi`
`micro`	`250m`	`256Mi`
`small`	`500m`	`512Mi`
`medium`	`500m`	`1Gi`
`large`	`1`	`2Gi`
`xlarge`	`2`	`4Gi`
`2xlarge`	`4`	`8Gi`

Last modified 2025-07-01: [docs] Update managed apps reference (cada010)