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257 lines
12 KiB
Markdown
257 lines
12 KiB
Markdown
![logo](https://assets.zabbix.com/img/logo/zabbix_logo_500x131.png)
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# What is Zabbix?
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Zabbix is an enterprise-class open source distributed monitoring solution.
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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.
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For more information and related downloads for Zabbix components, please visit [`Red Hat Container Catalog`](https://access.redhat.com/containers/?tab=overview#/registry.connect.redhat.com/zabbix/zabbix-appliance) and https://zabbix.com
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# What is Zabbix appliance?
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Zabbix appliance contains MySQL database server, Zabbix server, Zabbix Java Gateway and Zabbix frontend based on Nginx web-server.
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# Zabbix appliance images
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These are the only official Zabbix appliance Docker images. They are based on Alpine Linux v3.4, Ubuntu 18.04 (bionic), CentOS 7 and Red Hat Enterprise Linux 7 images. The available versions of Zabbix appliance are:
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Zabbix appliance 3.0 (tags: alpine-3.0-latest, ubuntu-3.0-latest, centos-3.0-latest)
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Zabbix appliance 3.0.* (tags: alpine-3.0.*, ubuntu-3.0.*, centos-3.0.*)
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Zabbix appliance 3.2 (tags: alpine-3.2-latest, ubuntu-3.2-latest, centos-3.2-latest)
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Zabbix appliance 3.2.* (tags: alpine-3.2.*, ubuntu-3.2.*, centos-3.2.*)
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Zabbix appliance 3.4 (tags: alpine-3.4-latest, ubuntu-3.4-latest, centos-3.4-latest)
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Zabbix appliance 3.4.* (tags: alpine-3.4.*, ubuntu-3.4.*, centos-3.4.*)
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Zabbix appliance 4.0 (tags: alpine-4.0-latest, ubuntu-4.0-latest, centos-4.0-latest)
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Zabbix appliance 4.0.* (tags: alpine-4.0.*, ubuntu-4.0.*, centos-4.0.*)
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Zabbix appliance 4.2 (tags: alpine-4.2-latest, ubuntu-4.2-latest, centos-4.2-latest, alpine-latest, ubuntu-latest, centos-latest, latest)
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Zabbix appliance 4.2.* (tags: alpine-4.2.*, ubuntu-4.2.*, centos-4.2.*)
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Zabbix appliance 4.4 (tags: alpine-trunk, ubuntu-trunk, centos-trunk)
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Images are updated when new releases are published. The image with ``latest`` tag is based on Alpine Linux.
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The image uses MySQL database. The image is very useful for testing purposes.
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# How to use this image
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## Start `zabbix-appliance`
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Start a Zabbix server container as follows:
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docker run --name some-zabbix-appliance -p 80:80 -p 10051:10051 -d registry.connect.redhat.com/zabbix/zabbix-appliance:tag
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Where `some-zabbix-appliance` is the name you want to assign to your container. See the list above for relevant tags, or look at the [full list of tags](https://access.redhat.com/containers/?tab=tags&platform=docker#/registry.connect.redhat.com/zabbix/zabbix-appliance).
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## Container shell access and viewing Zabbix appliance logs
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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-appliance` container:
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```console
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$ docker exec -ti some-zabbix-appliance /bin/bash
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```
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The Zabbix appliance logs is available through Docker's container log:
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```console
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$ docker logs some-zabbix-appliance
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```
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## Environment Variables
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When you start the `zabbix-appliance` image, you can adjust the configuration of the Zabbix appliance by passing one or more environment variables on the `docker run` command line.
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### `PHP_TZ`
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The variable is timezone in PHP format. Full list of supported timezones are available on [`php.net`](http://php.net/manual/en/timezones.php). By default, value is 'Europe/Riga'.
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### `ZBX_LOADMODULE`
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The variable is list of comma separated loadable Zabbix modules. It works with volume ``/var/lib/zabbix/modules``. The syntax of the variable is ``dummy1.so,dummy2.so``.
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### `ZBX_DEBUGLEVEL`
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The variable is used to specify debug level. By default, value is ``3``. It is ``DebugLevel`` parameter in ``zabbix_server.conf``. Allowed values are listed below:
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- ``0`` - basic information about starting and stopping of Zabbix processes;
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- ``1`` - critical information
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- ``2`` - error information
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- ``3`` - warnings
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- ``4`` - for debugging (produces lots of information)
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- ``5`` - extended debugging (produces even more information)
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### `ZBX_TIMEOUT`
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The variable is used to specify timeout for processing checks. By default, value is ``4``.
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### `ZBX_SERVER_NAME`
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The variable is visible Zabbix installation name in right top corner of the web interface.
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### `ZBX_MAXEXECUTIONTIME`
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The varable is PHP ``max_execution_time`` option. By default, value is `300`.
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### `ZBX_MEMORYLIMIT`
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The varable is PHP ``memory_limit`` option. By default, value is `128M`.
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### `ZBX_POSTMAXSIZE`
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The varable is PHP ``post_max_size`` option. By default, value is `16M`.
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### `ZBX_UPLOADMAXFILESIZE`
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The varable is PHP ``upload_max_filesize`` option. By default, value is `2M`.
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### `ZBX_MAXINPUTTIME`
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The varable is PHP ``max_input_time`` option. By default, value is `300`.
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### `ZBX_SESSION_NAME`
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The variable is Zabbix frontend [definition](https://www.zabbix.com/documentation/4.2/manual/web_interface/definitions). String used as the name of the Zabbix frontend session cookie. By default, value is `zbx_sessionid`.
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### Other variables
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Additionally the image allows to specify many other environment variables listed below:
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```
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ZBX_LISTENIP=
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ZBX_STARTPOLLERS=5
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ZBX_IPMIPOLLERS=0
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ZBX_STARTPOLLERSUNREACHABLE=1
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ZBX_STARTTRAPPERS=5
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ZBX_STARTPINGERS=1
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ZBX_STARTDISCOVERERS=1
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ZBX_STARTHTTPPOLLERS=1
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ZBX_STARTTIMERS=1
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ZBX_STARTESCALATORS=1
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ZBX_STARTJAVAPOLLERS=5
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ZBX_STARTVMWARECOLLECTORS=0
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ZBX_VMWAREFREQUENCY=60
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ZBX_VMWAREPERFFREQUENCY=60
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ZBX_VMWARECACHESIZE=8M
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ZBX_VMWARETIMEOUT=10
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ZBX_ENABLE_SNMP_TRAPS=false
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ZBX_SOURCEIP=
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ZBX_HOUSEKEEPINGFREQUENCY=1
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ZBX_MAXHOUSEKEEPERDELETE=5000
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ZBX_SENDERFREQUENCY=30
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ZBX_CACHESIZE=8M
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ZBX_CACHEUPDATEFREQUENCY=60
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ZBX_STARTDBSYNCERS=4
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ZBX_HISTORYCACHESIZE=16M
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ZBX_HISTORYINDEXCACHESIZE=4M
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ZBX_TRENDCACHESIZE=4M
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ZBX_VALUECACHESIZE=8M
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ZBX_TRAPPERIMEOUT=300
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ZBX_UNREACHABLEPERIOD=45
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ZBX_UNAVAILABLEDELAY=60
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ZBX_UNREACHABLEDELAY=15
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ZBX_LOGSLOWQUERIES=3000
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ZBX_STARTPROXYPOLLERS=1
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ZBX_PROXYCONFIGFREQUENCY=3600
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ZBX_PROXYDATAFREQUENCY=1
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ZBX_TLSCAFILE=
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ZBX_TLSCRLFILE=
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ZBX_TLSCERTFILE=
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ZBX_TLSKEYFILE=
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```
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Default values of these variables are specified after equal sign.
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The allowed variables are identical of parameters in official ``zabbix_server.conf``. For example, ``ZBX_LOGSLOWQUERIES`` = ``LogSlowQueries``.
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Please use official documentation for [``zabbix_server.conf``](https://www.zabbix.com/documentation/3.0/manual/appendix/config/zabbix_server) to get more information about the variables.
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## Allowed volumes for the Zabbix server container
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### ``/usr/lib/zabbix/alertscripts``
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The volume is used for custom alert scripts. It is `AlertScriptsPath` parameter in ``zabbix_server.conf``.
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### ``/usr/lib/zabbix/externalscripts``
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The volume is used by External checks (type of items). It is `ExternalScripts` parameter in ``zabbix_server.conf``.
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### ``/var/lib/zabbix/modules``
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The volume allows load additional modules and extend Zabbix server using ``LoadModule`` feature.
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### ``/var/lib/zabbix/enc``
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The volume is used to store TLS related files. These file names are specified using ``ZBX_TLSCAFILE``, ``ZBX_TLSCRLFILE``, ``ZBX_TLSKEY_FILE`` and ``ZBX_TLSPSKFILE`` variables.
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### ``/var/lib/zabbix/ssh_keys``
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The volume is used as location of public and private keys for SSH checks and actions. It is `SSHKeyLocation` parameter in ``zabbix_server.conf``.
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### ``/var/lib/zabbix/ssl/certs``
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The volume is used as location of of SSL client certificate files for client authentication. It is `SSLCertLocation` parameter in ``zabbix_server.conf``.
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### ``/var/lib/zabbix/ssl/keys``
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The volume is used as location of SSL private key files for client authentication. It is `SSLKeyLocation` parameter in ``zabbix_server.conf``.
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### ``/var/lib/zabbix/ssl/ssl_ca``
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The volume is used as location of certificate authority (CA) files for SSL server certificate verification. It is `SSLCALocation` parameter in ``zabbix_server.conf``.
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### ``/var/lib/zabbix/snmptraps``
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The volume is used as location of ``snmptraps.log`` file. It could be shared by ``zabbix-snmptraps`` container and inherited using `volumes_from` Docker option while creating new instance of Zabbix server.
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SNMP traps processing feature could be enabled using shared volume and switched ``ZBX_ENABLE_SNMP_TRAPS`` environment variable to `true`.
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### ``/var/lib/zabbix/mibs``
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The volume allows to add new MIB files. It does not support subdirectories, all MIBs must be placed to ``/var/lib/zabbix/mibs``.
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### ``/etc/ssl/nginx``
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The volume allows to enable HTTPS for the Zabbix web interface. The volume must contains two files ``ssl.crt``, ``ssl.key`` and ``dhparam.pem`` prepared for Nginx SSL connections.
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Please follow official Nginx [documentation](http://nginx.org/en/docs/http/configuring_https_servers.html) to get more details about how to create certificate files.
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# The image variants
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The `zabbix-appliance` images come in many flavors, each designed for a specific use case.
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## `zabbix-appliance:ubuntu-<version>`
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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.
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## `zabbix-appliance:alpine-<version>`
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This image is based on the popular [Alpine Linux project](http://alpinelinux.org), available in [the `alpine` official image](https://hub.docker.com/_/alpine). Alpine Linux is much smaller than most distribution base images (~5MB), and thus leads to much slimmer images in general.
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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](http://www.musl-libc.org) instead of [glibc and friends](http://www.etalabs.net/compare_libcs.html), 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](https://news.ycombinator.com/item?id=10782897) for more discussion of the issues that might arise and some pro/con comparisons of using Alpine-based images.
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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](https://hub.docker.com/_/alpine/) for examples of how to install packages if you are unfamiliar).
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# Supported Docker versions
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This image is officially supported on Docker version 1.12.0.
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Support for older versions (down to 1.6) is provided on a best-effort basis.
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Please see [the Docker installation documentation](https://docs.docker.com/installation/) for details on how to upgrade your Docker daemon.
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# User Feedback
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## Documentation
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Documentation for this image is stored in the [`zabbix-appliance/` directory](https://github.com/zabbix/zabbix-docker/tree/3.0/zabbix-appliance) of the [`zabbix/zabbix-docker` GitHub repo](https://github.com/zabbix/zabbix-docker/). Be sure to familiarize yourself with the [repository's `README.md` file](https://github.com/zabbix/zabbix-docker/blob/master/README.md) before attempting a pull request.
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## Issues
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If you have any problems with or questions about this image, please contact us through a [GitHub issue](https://github.com/zabbix/zabbix-docker/issues).
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### Known issues
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Some configuration environment variables are the same between multiple Zabbix components. Be careful when change these variables.
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## Contributing
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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.
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Before you start to code, we recommend discussing your plans through a [GitHub issue](https://github.com/zabbix/zabbix-docker/issues), 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.
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