wait-for

Wait-for is a binary used to wait for a resource (like a database or a message broker) to be available. It supports PostgreSQL, MySQL, MongoDB databases and RabbitMQ message broker.

Installing

Here is an example of wait-for installation in a Dockerfile:

ENV WAIT_FOR_VERSION=v0.0.4
RUN wget "https://github.com/arcanjoaq/wait-for/releases/download/${WAIT_FOR_VERSION}/wait-for" && chmod u+x wait-for

Usage

Basically, the option --type determines the target resource. Here are some examples of wait-for:

MySQL

./wait-for --type mysql \
           --host localhost \
           --port 3306 \
           --user root \
           --password mysql \
           --name mysql \
           --maxAttempts 100

PostgreSQL

./wait-for --type postgres \
           --host localhost \
           --port 5432 \
           --user test \
           --password test \
           --name test \
           --maxAttempts 100

MongoDB

./wait-for --type mongodb \
           --host localhost \
           --port 27017 \
           --user test \
           --password test \
           --name test \
           --maxAttempts 100

RabbitMQ

./wait-for --type rabbitmq \
           --host localhost \
           --port 5672 \
           --user test \
           --password test \
           --name '/' \
           --maxAttempts 100

Options

--type: Set resource type.

--host: Set target host. The default value is "localhost".

--port: Set resource port. The default value depends on resource type.

--user: Set resource user.

--password: Set resource password.

--name: Se resource name. It is database name or virtual host name.

--seconds: Set number of seconds to wait for a resource. The default value is "10".

--maxAttempts: Set max attempts quantity. The default value is "3".

Linting

make lint

Building

make build

Licensing

Apache 2.0