zabbix-docker/Dockerfiles/web-apache-pgsql/alpine

What is Zabbix?

Zabbix is an enterprise-class open source distributed monitoring solution.

Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Zabbix uses a flexible notification mechanism that allows users to configure e-mail based alerts for virtually any event. This allows a fast reaction to server problems. Zabbix offers excellent reporting and data visualisation features based on the stored data. This makes Zabbix ideal for capacity planning.

For more information and related downloads for Zabbix components, please visit https://hub.docker.com/u/zabbix/ and https://zabbix.com

What is Zabbix web interface?

Zabbix web interface is a part of Zabbix software. It is used to manage resources under monitoring and view monitoring statistics.

Zabbix web interface images

These are the only official Zabbix web interface Docker images. They are based on Alpine Linux v3.12, Ubuntu 20.04 (focal), CentOS 8 and Oracle Linux 8 images. The available versions of Zabbix web interface are:

Zabbix web interface 3.0 (tags: alpine-3.0-latest, ubuntu-3.0-latest, centos-3.0-latest) (unsupported)
Zabbix web interface 3.0.* (tags: alpine-3.0.*, ubuntu-3.0.*, centos-3.0.*) (unsupported)
Zabbix web interface 3.2 (tags: alpine-3.2-latest, ubuntu-3.2-latest, centos-3.2-latest) (unsupported)
Zabbix web interface 3.2.* (tags: alpine-3.2.*, ubuntu-3.2.*, centos-3.2.*) (unsupported)
Zabbix web interface 3.4 (tags: alpine-3.4-latest, ubuntu-3.4-latest, centos-3.4-latest) (unsupported)
Zabbix web interface 3.4.* (tags: alpine-3.4.*, ubuntu-3.4.*, centos-3.4.*) (unsupported)
Zabbix web interface 4.0 (tags: alpine-4.0-latest, ubuntu-4.0-latest, centos-4.0-latest)
Zabbix web interface 4.0.* (tags: alpine-4.0.*, ubuntu-4.0.*, centos-4.0.*)
Zabbix web interface 4.2 (tags: alpine-4.2-latest, ubuntu-4.2-latest, centos-4.2-latest) (unsupported)
Zabbix web interface 4.2.* (tags: alpine-4.2.*, ubuntu-4.2.*, centos-4.2.*) (unsupported)
Zabbix web interface 4.4 (tags: alpine-4.4-latest, ubuntu-4.4-latest, centos-4.4-latest) (unsupported)
Zabbix web interface 4.4.* (tags: alpine-4.4.*, ubuntu-4.4.*, centos-4.4.*) (unsupported)
Zabbix web interface 5.0 (tags: alpine-5.0-latest, ubuntu-5.0-latest, ol-5.0-latest)
Zabbix web interface 5.0.* (tags: alpine-5.0.*, ubuntu-5.0.*, ol-5.0.*)
Zabbix web interface 5.2 (tags: alpine-5.2-latest, ubuntu-5.2-latest, ol-5.2-latest)
Zabbix web interface 5.2.* (tags: alpine-5.2.*, ubuntu-5.2.*, ol-5.2.*)
Zabbix web interface 5.4 (tags: alpine-5.4-latest, ubuntu-5.4-latest, ol-5.4-latest, alpine-latest, ubuntu-latest, ol-latest, latest)
Zabbix web interface 5.4.* (tags: alpine-5.4.*, ubuntu-5.4.*, ol-5.4.*)
Zabbix web interface 6.0 (tags: alpine-trunk, ubuntu-trunk, ol-trunk)

Images are updated when new releases are published. The image with latest tag is based on Alpine Linux.

Zabbix web interface available in four editions:

• Zabbix web-interface based on Apache2 web server with MySQL database support
• Zabbix web-interface based on Apache2 web server with PostgreSQL database support
• Zabbix web-interface based on Nginx web server with MySQL database support
• Zabbix web-interface based on Nginx web server with PostgreSQL database support

The image based on Apache2 web server with PostgreSQL database support.

How to use this image

Start zabbix-web-apache-pgsql

Start a Zabbix web-interface container as follows:

docker run --name some-zabbix-web-apache-pgsql -e DB_SERVER_HOST="some-postgres-server" -e POSTGRES_USER="some-user" -e POSTGRES_PASSWORD="some-password" -e ZBX_SERVER_HOST="some-zabbix-server" -e PHP_TZ="some-timezone" -d zabbix/zabbix-web-apache-pgsql:tag

Where some-zabbix-web-apache-pgsql is the name you want to assign to your container, some-postgres-server is IP or DNS name of PostgreSQL server, some-user is user to connect to Zabbix database on PostgreSQL server, some-password is the password to connect to PostgreSQL server, some-zabbix-server is IP or DNS name of Zabbix server or proxy, some-timezone is PHP like timezone name and tag is the tag specifying the version you want. See the list above for relevant tags, or look at the full list of tags.

Linking the container to Zabbix server

docker run --name some-zabbix-web-apache-pgsql --link some-zabbix-server:zabbix-server -e DB_SERVER_HOST="some-postgres-server" -e POSTGRES_USER="some-user" -e POSTGRES_PASSWORD="some-password" -e ZBX_SERVER_HOST="some-zabbix-server" -e PHP_TZ="some-timezone" -d zabbix/zabbix-web-apache-pgsql:tag

Linking the container to PostgreSQL database

docker run --name some-zabbix-web-apache-pgsql --link some-postgres-server:postgres -e DB_SERVER_HOST="some-postgres-server" -e POSTGRES_USER="some-user" -e POSTGRES_PASSWORD="some-password" -e ZBX_SERVER_HOST="some-zabbix-server" -e PHP_TZ="some-timezone" -d zabbix/zabbix-web-apache-pgsql:tag

Container shell access and viewing Zabbix web interface logs

The docker exec command allows you to run commands inside a Docker container. The following command line will give you a bash shell inside your zabbix-web-apache-pgsql container:

$ docker exec -ti some-zabbix-web-apache-pgsql /bin/bash

The Zabbix web interface log is available through Docker's container log:

$ docker logs  some-zabbix-web-apache-pgsql

Environment Variables

When you start the zabbix-web-apache-pgsql image, you can adjust the configuration of the Zabbix web interface by passing one or more environment variables on the docker run command line.

ZBX_SERVER_HOST

This variable is IP or DNS name of Zabbix server. By default, value is zabbix-server.

ZBX_SERVER_PORT

This variable is port Zabbix server listening on. By default, value is 10051.

DB_SERVER_HOST

This variable is IP or DNS name of PostgreSQL server. By default, value is 'postgres-server'

DB_SERVER_PORT

This variable is port of PostgreSQL server. By default, value is '5432'.

POSTGRES_USER, POSTGRES_PASSWORD, POSTGRES_USER_FILE, POSTGRES_PASSWORD_FILE

These variables are used by Zabbix web interface to connect to Zabbix database. With the _FILE variables you can instead provide the path to a file which contains the user / the password instead. Without Docker Swarm or Kubernetes you also have to map the files. Those are exclusive so you can just provide one type - either POSTGRES_USER or POSTGRES_USER_FILE!

docker run --name some-zabbix-web-apache-pgsql -e DB_SERVER_HOST="some-postgres-server" -v ./.POSTGRES_USER:/run/secrets/POSTGRES_USER -e POSTGRES_USER_FILE=/run/secrets/POSTGRES_USER -v ./.POSTGRES_PASSWORD:/run/secrets/POSTGRES_PASSWORD -e POSTGRES_PASSWORD_FILE=/var/run/secrets/POSTGRES_PASSWORD -e ZBX_SERVER_HOST="some-zabbix-server" -e PHP_TZ="some-timezone" -d zabbix/zabbix-web-apache-pgsql:tag

With Docker Swarm or Kubernetes this works with secrets. That way it is replicated in your cluster!

printf "zabbix" | docker secret create POSTGRES_USER -
printf "zabbix" | docker secret create POSTGRES_PASSWORD -
docker run --name some-zabbix-web-apache-pgsql -e DB_SERVER_HOST="some-postgres-server" -e POSTGRES_USER_FILE=/run/secrets/POSTGRES_USER -e POSTGRES_PASSWORD_FILE=/run/secrets/POSTGRES_PASSWORD -e ZBX_SERVER_HOST="some-zabbix-server" -e PHP_TZ="some-timezone" -d zabbix/zabbix-web-apache-pgsql:tag

By default, values for POSTGRES_USER and POSTGRES_PASSWORD are zabbix, zabbix.

POSTGRES_DB

The variable is Zabbix database name. By default, value is zabbix.

POSTGRES_USE_IMPLICIT_SEARCH_PATH

In some setups, for example including PgBouncer, setting the search_path via connection parameters fails. If this variable is set to "true", the image skips setting the search_path and trusts that the search_path of the Zabbix user is setup correctly in PostgreSQL database.

ZBX_HISTORYSTORAGEURL

History storage HTTP[S] URL. This parameter is used for Elasticsearch setup. Available since 3.4.5.

ZBX_HISTORYSTORAGETYPES

Array of value types to be sent to the history storage. An example: ['uint', 'dbl']. This parameter is used for Elasticsearch setup. Available since 3.4.5.

PHP_TZ

The variable is timezone in PHP format. Full list of supported timezones are available on php.net. By default, value is 'Europe/Riga' and system timezone since Zabbix 5.2.0.

ZBX_SERVER_NAME

The variable is visible Zabbix installation name in right top corner of the web interface.

DB_DOUBLE_IEEE754

Use IEEE754 compatible value range for 64-bit Numeric (float) history values. Available since 5.0.0. Enabled by default.

ENABLE_WEB_ACCESS_LOG

The variable sets the Access Log directive for Web-server. By default, value corresponds to standard output.

ZBX_MAXEXECUTIONTIME

The varable is PHP max_execution_time option. By default, value is 300.

ZBX_MEMORYLIMIT

The varable is PHP memory_limit option. By default, value is 128M.

ZBX_POSTMAXSIZE

The varable is PHP post_max_size option. By default, value is 16M.

ZBX_UPLOADMAXFILESIZE

The varable is PHP upload_max_filesize option. By default, value is 2M.

ZBX_MAXINPUTTIME

The varable is PHP max_input_time option. By default, value is 300.

ZBX_SESSION_NAME

The variable is Zabbix frontend definition. String used as the name of the Zabbix frontend session cookie. By default, value is zbx_sessionid.

ZBX_DENY_GUI_ACCESS

Enable (true) maintenance mode for Zabbix web-interface.

ZBX_GUI_ACCESS_IP_RANGE

Array of IP addresses which are allowed for accessing to Zabbix web-interface during maintenance period.

ZBX_GUI_WARNING_MSG

Information message about maintenance period for Zabbix web-interface.

ZBX_DB_ENCRYPTION

The variable allows to activate encryption for connections to Zabbix database. Even if no other environment variables are specified, connections will be TLS-encrypted if ZBX_DB_ENCRYPTION=true specified. Available since 5.0.0. Disabled by default.

ZBX_DB_KEY_FILE

The variable allows to specify the full path to a valid TLS key file. Available since 5.0.0.

ZBX_DB_CERT_FILE

The variable allows to specify the full path to a valid TLS certificate file. Available since 5.0.0.

ZBX_DB_CA_FILE

The variable allows to specify the full path to a valid TLS certificate authority file. Available since 5.0.0.

ZBX_DB_VERIFY_HOST

The variable allows to activate host verification. Available since 5.0.0.

ZBX_SSO_SETTINGS

The variable allows to specify custom SSO settings in JSON format. Available since 5.0.0.

Other variables

Additionally the image allows to specify many other environment variables listed below:

ZBX_VAULTDBPATH= # Available since 5.2.0
ZBX_VAULTURL=https://127.0.0.1:8200 # Available since 5.2.0
VAULT_TOKEN= # Available since 5.2.0

Allowed volumes for the Zabbix web interface container

/etc/ssl/apache2

The volume allows to enable HTTPS for the Zabbix web interface. The volume must contains two files ssl.crt and ssl.key prepared for Apache2 SSL connections.

Please follow official Apache2 documentation to get more details about how to create certificate files.

/etc/zabbix/web/certs

The volume allows to use custom certificates for SAML authentification. The volume must contains three files sp.key, sp.crt and idp.crt. Available since 5.0.0.

The image variants

The zabbix-web-apache-pgsql images come in many flavors, each designed for a specific use case.

zabbix-web-apache-pgsql:alpine-<version>

This image is based on the popular Alpine Linux project, available in the alpine official image. Alpine Linux is much smaller than most distribution base images (~5MB), and thus leads to much slimmer images in general.

This variant is highly recommended when final image size being as small as possible is desired. The main caveat to note is that it does use musl libc instead of glibc and friends, so certain software might run into issues depending on the depth of their libc requirements. However, most software doesn't have an issue with this, so this variant is usually a very safe choice. See this Hacker News comment thread for more discussion of the issues that might arise and some pro/con comparisons of using Alpine-based images.

To minimize image size, it's uncommon for additional related tools (such as git or bash) to be included in Alpine-based images. Using this image as a base, add the things you need in your own Dockerfile (see the alpine image description for examples of how to install packages if you are unfamiliar).

zabbix-web-apache-pgsql:ubuntu-<version>

This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of.

zabbix-web-apache-pgsql:ol-<version>

Oracle Linux is an open-source operating system available under the GNU General Public License (GPLv2). Suitable for general purpose or Oracle workloads, it benefits from rigorous testing of more than 128,000 hours per day with real-world workloads and includes unique innovations such as Ksplice for zero-downtime kernel patching, DTrace for real-time diagnostics, the powerful Btrfs file system, and more.

Supported Docker versions

This image is officially supported on Docker version 1.12.0.

Support for older versions (down to 1.6) is provided on a best-effort basis.

Please see the Docker installation documentation for details on how to upgrade your Docker daemon.

User Feedback

Documentation

Documentation for this image is stored in the web-apache-pgsql/ directory of the zabbix/zabbix-docker GitHub repo. Be sure to familiarize yourself with the repository's README.md file before attempting a pull request.

Issues

If you have any problems with or questions about this image, please contact us through a GitHub issue.

Known issues

Contributing

You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.

Before you start to code, we recommend discussing your plans through a GitHub issue, especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.