Table of Contents

Store #

The store component of Thanos implements the Store API on top of historical data in an object storage bucket. It acts primarily as an API gateway and therefore does not need significant amounts of local disk space. It joins a Thanos cluster on startup and advertises the data it can access. It keeps a small amount of information about all remote blocks on local disk and keeps it in sync with the bucket. This data is generally safe to delete across restarts at the cost of increased startup times.

$ thanos store \
    --data-dir        "/local/state/data/dir" \
    --objstore.config-file "bucket.yml"

The content of bucket.yml:

type: GCS
config:
  bucket: example-bucket

In general about 1MB of local disk space is required per TSDB block stored in the object storage bucket.

Flags #

usage: thanos store [<flags>]

store node giving access to blocks in a bucket provider. Now supported GCS, S3,
Azure, Swift and Tencent COS.

Flags:
  -h, --help                     Show context-sensitive help (also try
                                 --help-long and --help-man).
      --version                  Show application version.
      --log.level=info           Log filtering level.
      --log.format=logfmt        Log format to use.
      --tracing.config-file=<tracing.config-yaml-path>
                                 Path to YAML file that contains tracing
                                 configuration.
      --tracing.config=<tracing.config-yaml>
                                 Alternative to 'tracing.config-file' flag.
                                 Tracing configuration in YAML.
      --http-address="0.0.0.0:10902"
                                 Listen host:port for HTTP endpoints.
      --grpc-address="0.0.0.0:10901"
                                 Listen ip:port address for gRPC endpoints
                                 (StoreAPI). Make sure this address is routable
                                 from other components.
      --grpc-server-tls-cert=""  TLS Certificate for gRPC server, leave blank to
                                 disable TLS
      --grpc-server-tls-key=""   TLS Key for the gRPC server, leave blank to
                                 disable TLS
      --grpc-server-tls-client-ca=""
                                 TLS CA to verify clients against. If no client
                                 CA is specified, there is no client
                                 verification on server side. (tls.NoClientCert)
      --data-dir="./data"        Data directory in which to cache remote blocks.
      --index-cache-size=250MB   Maximum size of items held in the index cache.
      --chunk-pool-size=2GB      Maximum size of concurrently allocatable bytes
                                 for chunks.
      --store.grpc.series-sample-limit=0
                                 Maximum amount of samples returned via a single
                                 Series call. 0 means no limit. NOTE: for
                                 efficiency we take 120 as the number of samples
                                 in chunk (it cannot be bigger than that), so
                                 the actual number of samples might be lower,
                                 even though the maximum could be hit.
      --store.grpc.series-max-concurrency=20
                                 Maximum number of concurrent Series calls.
      --objstore.config-file=<bucket.config-yaml-path>
                                 Path to YAML file that contains object store
                                 configuration.
      --objstore.config=<bucket.config-yaml>
                                 Alternative to 'objstore.config-file' flag.
                                 Object store configuration in YAML.
      --sync-block-duration=3m   Repeat interval for syncing the blocks between
                                 local and remote view.
      --block-sync-concurrency=20
                                 Number of goroutines to use when syncing blocks
                                 from object storage.
      --min-time=0000-01-01T00:00:00Z
                                 Start of time range limit to serve. Thanos
                                 Store serves only metrics, which happened later
                                 than this value. Option can be a constant time
                                 in RFC3339 format or time duration relative to
                                 current time, such as -1d or 2h45m. Valid
                                 duration units are ms, s, m, h, d, w, y.
      --max-time=9999-12-31T23:59:59Z
                                 End of time range limit to serve. Thanos Store
                                 serves only blocks, which happened eariler than
                                 this value. Option can be a constant time in
                                 RFC3339 format or time duration relative to
                                 current time, such as -1d or 2h45m. Valid
                                 duration units are ms, s, m, h, d, w, y.

Time based partioning #

By default Thanos Store Gateway looks at all the data in Object Store and returns it based on query’s time range.

Thanos Store --min-time, --max-time flags allows you to shard Thanos Store based on constant time or time duration relative to current time.

For example setting: --min-time=-6w & --max-time==-2w will make Thanos Store Gateway return metrics that fall within now - 6 weeks up to now - 2 weeks time range.

Constant time needs to be set in RFC3339 format. For example --min-time=2018-01-01T00:00:00Z, --max-time=2019-01-01T23:59:59Z.

Thanos Store Gateway might not get new blocks immediately, as Time partitioning is partly done in asynchronous block synchronization job, which is by default done every 3 minutes. Additionally some of the Object Store implementations provide eventual read-after-write consistency, which means that Thanos Store might not immediately get newly created & uploaded blocks anyway.

We recommend having overlapping time ranges with Thanos Sidecar and other Thanos Store gateways as this will improve your resiliency to failures.

Thanos Querier deals with overlapping time series by merging them together.

Filtering is done on a Chunk level, so Thanos Store might still return Samples which are outside of --min-time & --max-time.


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