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CrateDB

qianmoQqianmoQ· 更新于 2026-10-14· 阅读 27 分钟· 0 次阅读
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CrateDB

Since v0.44.0

Introduction

The Testcontainers module for CrateDB.

CrateDB is a distributed SQL database that combines the power of Lucene-based full-text search with the convenience of standard SQL. It offers PostgreSQL wire-protocol compatibility, making it easy to connect with existing PostgreSQL drivers and tools, and is optimised for real-time analytics on large datasets.

Adding this module to your project dependencies

Please run the following command to add the CrateDB module to your Go dependencies:

go get github.com/testcontainers/testcontainers-go/modules/cratedb

Usage example

Creating a CrateDB container

ctx := context.Background()

cratedbContainer, err := cratedb.Run(ctx,
    "crate:5.7",
)
defer func() {
    if err := testcontainers.TerminateContainer(cratedbContainer); err != nil {
        log.Printf("failed to terminate container: %s", err)
    }
}()
if err != nil {
    log.Printf("failed to start container: %s", err)
    return
}

Module Reference

Run function

The CrateDB module exposes one entrypoint function to create the CrateDB container, and this function receives three parameters:

func Run(ctx context.Context, img string, opts ...testcontainers.ContainerCustomizer) (*Container, error)
  • context.Context, the Go context.
  • string, the Docker image to use.
  • testcontainers.ContainerCustomizer, a variadic argument for passing options.

Container Ports

Here you can find the list with the default ports used by the CrateDB container.

Container Ports

httpPort = "4200/tcp"
pgPort   = "5432/tcp"

Image

Use the second argument in the Run function to set a valid Docker image. For example: Run(context.Background(), "crate:5.7").

Container Options

When starting the CrateDB container, you can pass options in a variadic way to configure it.

WithHeapSize

Sets the JVM heap size for the CrateDB process via the CRATE_HEAP_SIZE environment variable. The default value is 512m.

cratedb.WithHeapSize("1g")

The following options are exposed by the testcontainers package.

Basic Options

Lifecycle Options

Files & Mounts Options

Build Options

Logging Options

Image Options

Networking Options

Advanced Options

Experimental Options

Container Methods

The CrateDB container exposes the following methods:

HTTPEndpoint

Returns the HTTP endpoint (Admin UI and REST API) of the CrateDB container on port 4200/tcp.

endpoint, err := cratedbContainer.HTTPEndpoint(ctx)
// endpoint: "http://localhost:32768"

PGConnectionString

Returns the PostgreSQL wire-protocol connection string for the CrateDB container on port 5432/tcp. CrateDB's built-in superuser is crate with no password, and the default schema is doc. Accepts an optional variadic list of extra query parameters, e.g. "sslmode=disable" or "connect_timeout=10".

connStr, err := cratedbContainer.PGConnectionString(ctx, "sslmode=disable")
// connStr: "postgres://crate@localhost:32769/doc?sslmode=disable"

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