docker-geoserver

A simple docker container that runs GeoServer influenced by this docker recipe: https://github.com/eliotjordan/docker-geoserver/blob/master/Dockerfile

Getting the image

There are various ways to get the image onto your system:

The preferred way (but using most bandwidth for the initial image) is to get our docker trusted build like this:

docker pull kartoza/geoserver

Building the image

To build yourself with a local checkout using the docker-compose.build.yaml:

Edit the .env to change the build arguments:

IMAGE_VERSION=tomcat image tag
JAVA_HOME= java home path corresponding to the tomcat version
WAR_URL= Default URL to fetch geoserver war or zip file
STABLE_PLUGIN_URL= URL to fetch geoserver plugins
ACTIVATE_ALL_STABLE_EXTENTIONS= Specifies whether to build all stable plugins or a single one
ACTIVATE_ALL_COMMUNITY_EXTENTIONS=Specifies whether to build all community plugins or a single one
GEOSERVER_UID=Specifies the uid to use for the user used to run GeoServer in the container
GEOSERVER_GID=Specifies the gid to use for the group used to run GeoServer in the container

git clone git://github.com/kartoza/docker-geoserver
cd docker-geoserver
docker-compose -f docker-compose-build.yml up -d --build

Building with war file from a URL

If you need to build the image with a custom GeoServer war file that will be downloaded from a server, you can pass the war file url as a build argument to docker, example:

docker build --build-arg WAR_URL=http://download2.nust.na/pub4/sourceforge/g/project/ge/geoserver/GeoServer/2.13.0/geoserver-2.13.0-war.zip --build-arg GS_VERSION=2.13.0

Note: war file version should match the version number provided by GS_VERSION argument otherwise we will have a mismatch of plugins and GeoServer installed.

Building with specific version of Tomcat

To build using a specific tagged release for tomcat image set the IMAGE_VERSION build-arg to 8-jre8: See the dockerhub tomcat to choose which tag you need to build against.

ie VERSION=2.17.0
docker build --build-arg IMAGE_VERSION=8-jre8 --build-arg GS_VERSION=2.17.0 -t kartoza/geoserver:${VERSION} .

For some recent builds it is necessary to set the JAVA_PATH as well (e.g. Apache Tomcat/9.0.36)

docker build --build-arg IMAGE_VERSION=9-jdk11-openjdk-slim --build-arg JAVA_HOME=/usr/local/openjdk-11/bin/java --build-arg GS_VERSION=2.17.0 -t kartoza/geoserver:2.17.0 .

Building with file system overlays (advanced)

The contents of resources/overlays will be copied to the image file system during the build. For example, to include a static Tomcat setenv.sh, create the file at resources/overlays/usr/local/tomcat/bin/setenv.sh.

You can use this functionality to write a static GeoServer directory to /opt/geoserver/data_dir, include additional jar files, and more.

If you have an already existing data_dir with a security setup from another Geoserver: set EXISTING_DATA_DIR=true. This will keep the passwords from getting changed by docker.

Overlay files will overwrite existing destination files, so be careful!

Build with CORS Support

The contents of resources/overlays will be copied to the image file system during the build. For example, to include a static web xml with CORS support web.xml, create the file at resources/overlays/usr/local/tomcat/conf/web.xml.

Environment Variables

A full list of environment variables are specified in the .env file

Activate plugins on runtime

The image is shipped with the following stable plugins:

• vectortiles-plugin
• wps-plugin
• printing-plugin
• libjpeg-turbo-plugin
• control-flow-plugin
• pyramid-plugin
• gdal-plugin

If you need to use other plugins you just pass an environment variable on start up which will activate the plugin ie

ie VERSION=2.16.2
docker run -d -p 8600:8080 --name geoserver -e STABLE_EXTENSIONS=charts-plugin,db2-plugin kartoza/geoserver:${VERSION} 

You can pass as many comma separated plugins as defined in the text file stable_plugins.txt

You can also activate the community plugins as defined in community_plugins.txt

ie VERSION=2.16.2
docker run -d -p 8600:8080 --name geoserver -e COMMUNITY_EXTENSIONS=gwc-sqlite-plugin,ogr-datastore-plugin kartoza/geoserver:${VERSION} 

Using sample data

If you need to play around with the default data directory you can activate it using the environment variable SAMPLE_DATA=true

ie VERSION=2.16.2
docker run -d -p 8600:8080 --name geoserver -e SAMPLE_DATA=true kartoza/geoserver:${VERSION} 

Enable disk quota storage in PostgreSQL backend

By default GeoServer uses H2 datastore for configuring dsk quota. You can use the PostgreSQL backend as a disk quota store.

You will need to run a PostgreSQL DB and link it to a GeoServer instance.

docker run -d -p 5432:5432 --name db kartoza/postgis:13.0
docker run -d -p 8600:8080 --name geoserver --link db:db -e DB_BACKEND=POSTGRES -e HOST=db -e POSTGRES_PORT=5432 -e POSTGRES_DB=gis -e POSTGRES_USER=docker -e POSTGRES_PASS=docker kartoza/geoserver:2.18.0

Running under SSL

You can use the environment variables to specify whether you want to run the GeoServer under SSL. Credits to letsencrpt for providing the solution to run under SSL.

If you set the environment variable SSL=true but do not provide the pem files (fullchain.pem and privkey.pem) the container will generate a self signed SSL certificates.

ie VERSION=2.16.2
docker run -it --name geoserver  -e PKCS12_PASSWORD=geoserver -e JKS_KEY_PASSWORD=geoserver -e JKS_STORE_PASSWORD=geoserver -e SSL=true -p 8443:8443 -p 8600:8080 kartoza/geoserver:${VERSION} 

If you already have your own perm files (fullchain.pem and privkey.pem) you can mount the directory containing your keys as:

ie VERSION=2.16.2
docker run -it --name geo -v /etc/letsencrpt:/etc/letsencrypt  -e PKCS12_PASSWORD=geoserver -e JKS_KEY_PASSWORD=geoserver -e JKS_STORE_PASSWORD=geoserver -e SSL=true -p 8443:8443 -p 8600:8080 kartoza/geoserver:${VERSION}  

You can also use a PFX file with this image. Rename your PFX file as certificate.pfx and then mount the folder containing your pfx file. This will be converted to perm files.

NB When using PFX files make sure that the ALIAS_KEY you specify as an environment variable matches the ALIAS_KEY that was used when generating your PFX key.

A full list of SSL variables is provided here

• HTTP_PORT
• HTTP_PROXY_NAME
• HTTP_PROXY_PORT
• HTTP_REDIRECT_PORT
• HTTP_CONNECTION_TIMEOUT
• HTTP_COMPRESSION
• HTTPS_PORT
• HTTPS_MAX_THREADS
• HTTPS_CLIENT_AUTH
• HTTPS_PROXY_NAME
• HTTPS_PROXY_PORT
• HTTPS_COMPRESSION
• JKS_FILE
• JKS_KEY_PASSWORD
• KEY_ALIAS
• JKS_STORE_PASSWORD
• P12_FILE

Removing Tomcat extras

To include Tomcat extras including docs, examples, and the manager webapp, set the TOMCAT_EXTRAS environment variable to true: NB You should configure the env variable TOMCAT_PASSWORD to use a strong password otherwise the default one is setup.

ie VERSION=2.16.2
docker run -it --name geoserver  -e TOMCAT_EXTRAS=true -p 8600:8080 kartoza/geoserver:${VERSION} 

Upgrading image to use a specific version

During initialization the image will run a script that updates the passwords. This is recommended to change passwords the first time that GeoServer runs but on subsequent upgrades a use should use the environment variable

EXISTING_DATA_DIR=true

This basically tells GeoServer that we are using a data directory that already exists and no passwords should be changed.

Installing extra fonts

If you have downloaded extra fonts you can mount the folder to the path /opt/fonts. This will ensure that all the .ttf files are copied to the correct path during initialisation.

ie VERSION=2.16.2
docker run -v fonts:/opt/fonts -p 8080:8080 -t kartoza/geoserver:${VERSION} .

Other Environment variables supported

You can also use the following environment variables to pass arguments to GeoServer:

• GEOSERVER_DATA_DIR=<PATH>
• ENABLE_JSONP=<true or false>
• MAX_FILTER_RULES=<Any integer>
• OPTIMIZE_LINE_WIDTH=<false or true>
• FOOTPRINTS_DATA_DIR=<PATH>
• GEOWEBCACHE_CACHE_DIR=<PATH>
• GEOSERVER_ADMIN_PASSWORD=<password>
• GEOSERVER_ADMIN_USER=<username>
• GEOSERVER_FILEBROWSER_HIDEFS=<false or true>

In order to prevent clickjacking attacks GeoServer defaults to setting the X-Frame-Options HTTP header to SAMEORIGIN. Controls whether the X-Frame-Options filter should be set at all. Default is true

• XFRAME_OPTIONS="true"

• Tomcat properties:

  • You can change the variables based on geoserver container considerations. These arguments operate on the -Xms and -Xmx options of the Java Virtual Machine
  • INITIAL_MEMORY=<size> : Initial Memory that Java can allocate, default 2G
  • MAXIMUM_MEMORY=<size> : Maximum Memory that Java can allocate, default 4G

Control flow properties

The control flow module is installed by default and it is used to manage request in geoserver. In order to customise it based on your resources and use case read the instructions from documentation. These options can be controlled by environment variables

• Control flow properties environment variables

  if a request waits in queue for more than 60 seconds it's not worth executing, the client will likely have given up by then

  • REQUEST_TIMEOUT=60 don't allow the execution of more than 100 requests total in parallel
  • PARARELL_REQUEST=100 don't allow more than 10 GetMap in parallel
  • GETMAP=10 don't allow more than 4 outputs with Excel output as it's memory bound
  • REQUEST_EXCEL=4 don't allow a single user to perform more than 6 requests in parallel (6 being the Firefox default concurrency level at the time of writing)
  • SINGLE_USER=6 don't allow the execution of more than 16 tile requests in parallel (assuming a server with 4 cores, GWC empirical tests show that throughput peaks up at 4 x number of cores. Adjust as appropriate to your system)
  • GWC_REQUEST=16
  • WPS_REQUEST=1000/d;30s

Changing GeoServer password and username on runtime

The default GeoServer user is 'admin' and the password is 'geoserver'. You can pass the environment variable GEOSERVER_ADMIN_PASSWORD and GEOSERVER_ADMIN_USER to change it on runtime.

docker run --name "geoserver" -e GEOSERVER_ADMIN_USER=kartoza  -e GEOSERVER_ADMIN_PASSWORD=myawesomegeoserver -p 8080:8080 -d -t kartoza/geoserver

Docker secrets

To avoid passing sensitive information in environment variables, _FILE can be appended to some of the variables to read from files present in the container. This is particularly useful in conjunction with Docker secrets, as passwords can be loaded from /run/secrets/<secret_name> e.g.:

• -e GEOSERVER_ADMIN_PASSWORD_FILE=/run/secrets/<geoserver_pass_secret>

For more information see https://docs.docker.com/engine/swarm/secrets/.

Currently, GEOSERVER_ADMIN_USER and GEOSERVER_ADMIN_PASSWORD are supported.

Clustering using JMS Plugin

GeoServer supports clustering using JMS cluster plugin or using the ActiveMQ-broker.

This setup uses the JMS cluster plugin which uses an embedded broker. A docker-compose.yml is provided in the clustering folder which simulates the replication using a shared data directory.

The environment variables associated with replication are listed below

• CLUSTERING=True - Specified whether clustering should be activated.
• BROKER_URL=tcp://0.0.0.0:61661 - This links to the internal broker provided by the JMS cluter plugin. This value will be different for (Master-Node)
• READONLY=disabled - Determines if the GeoServer instance is Read only
• RANDOMSTRING=87ee2a9b6802b6da_master - Used to create a unique CLUSTER_CONFIG_DIR for each instance.
• INSTANCE_STRING=d8a167a4e61b5415ec263 - Used to differentiate cluster instance names
• CLUSTER_DURABILITY=false
• TOGGLE_MASTER=true - Differentiates if the instance will be a Master
• TOGGLE_SLAVE=true - Differentiates if the instance will be a Node
• EMBEDDED_BROKER=disabled - Should be disabled for the Node

Running the Image

Run (automated using docker-compose)

Note: You probably want to use docker-compose for running as it will provide a repeatable orchestrated deployment system.

We provide a sample docker-compose.yml file that illustrates how you can establish a GeoServer + PostGIS.

If you are interested in the backups , add a section in the docker-compose.yml following instructions from docker-pg-backup.

If you start the stack using the compose file make sure you login into GeoServer using username:admin and password:myawesomegeoserver.

NB: The username and password are specified in the .env file and it is encouraged to change them into something more secure.

Please read the docker-compose documentation for details on usage and syntax of docker-compose - it is not covered here.

Once all services are started, test by visiting the GeoServer landing page in your browser: http://localhost:8600/geoserver.

To run in the background rather, press ctrl-c to stop the containers and run again in the background:

docker-compose up -d

Note: The docker-compose.yml uses host based volumes so when you remove the containers, all data will be kept. Using host based volumes ensures that your data persists between invocations of the compose file. If you need to delete the container data you need to run docker-compose down -v.

Run (automated using rancher)

An even nicer way to run the examples provided is to use our Rancher Catalogue Stack for GeoServer. See http://rancher.com for more details on how to set up and configure your Rancher environment. Once Rancher is set up, use the Admin -> Settings menu to add our Rancher catalogue using this URL:

https://github.com/kartoza/kartoza-rancher-catalogue

Once your settings are saved open a Rancher environment and set up a stack from the catalogue's 'Kartoza' section - you will see GeoServer listed there.

If you want to synchronise your GeoServer settings and database backups (created by the nightly backup tool in the stack), use Resilio sync to create two Read/Write keys:

• one for database backups
• one for GeoServer media backups

Note: Resilio sync is not Free Software. It is free to use for individuals. Business users need to pay - see their web site for details.

You can try a similar approach with Syncthing or Seafile (for free options) or Dropbox or Google Drive if you want to use another commercial product. These products all have one limitation though: they require interaction to register applications or keys. With Resilio Sync you can completely automate the process without user intervention.

Contributing to the image

We welcome users who want to contribute in enriching this service. We follow the git principles and all pull requests should be against the develop branch so that we can test them and when we are happy we push to the master branch.

Support

If you require more substantial assistance from kartoza (because our work and interaction on docker-geoserver is pro bono), please consider taking out a Support Level Agreeement

Credits

• Tim Sutton ([email protected])
• Shane St Clair ([email protected])
• Alex Leith ([email protected])
• Admire Nyakudya ([email protected])
• Gavin Fleming ([email protected])