Alauda Data Services Analytical Database E1
  • English

    • Architecture

    Alauda Data Services Analytical Database E1 is a single-Deployment operator that turns a ClickHouseInstallation (CHI) into a set of standard Kubernetes workload objects. Nothing in the data path is custom: every ClickHouse® server instance is an ordinary Pod inside an ordinary StatefulSet.

    TOC

    The operator DeploymentObject graph

    The operator Deployment

    One Deployment named clickhouse-operator in namespace operators, replicas: 1, with two containers:

    ContainerBinaryRole
    clickhouse-operatorcmd/operatorWatches the three CRDs and reconciles Kubernetes objects
    metrics-exportercmd/metrics_exporterScrapes each ClickHouse® host and re-exposes Prometheus metrics

    Pod and Service selector is the bare label app=clickhouse-operator, not app.kubernetes.io/name.

    Which namespaces the operator reconciles is decided by its OperatorGroup at install time, through the WATCH_NAMESPACE environment variable. Installed for all namespaces, it reconciles a ClickHouseInstallation wherever it is created. Installed into a single namespace, it reconciles only that namespace — a ClickHouseInstallation created anywhere else is silently ignored: no error, no events, no status. If a new cluster never progresses, check the install mode before anything else.

    Five ConfigMaps are mounted under /etc/clickhouse-operator (files, conf.d, config.d, templates.d, users.d) and supply the operator's own configuration and the baseline ClickHouse® config fragments.

    Object graph

    ClickHouse is a registered trademark of ClickHouse, Inc. https://clickhouse.com

    Alauda is an independent vendor. This product is not affiliated with, endorsed by, or sponsored by ClickHouse, Inc. All trademarks are the property of their respective owners and are used here for identification purposes only.