Zoe configuration

Zoe can be configured by files, environment variables or commandline options. Most of the configuration directives listed in this file can be specified by any of the three methods, with some exception outlined below. Use the --help command-line option to have more details on the format of environment variables and precedence rules.

Command-line options

These options can be specified only on the command-line:

  • --write-config <filename> : generate a configuration file with all options set to the default values
  • --log-file <filename> : write the log output to the specified file instead of stderr


The Zoe config file have a simple format of <option name> = <value>. Dash characters can be use for comments. All Zoe processes use a single configuration file, called zoe.conf. It is looked up in the current working directory and in /etc/zoe/.

Common options:

  • debug = <true|false> : enable or disable debug log output
  • deployment-name = devel : name of this Zoe deployment. Can be used to have multiple Zoe deployments using the same back-end (devel and prod, for example)


  • workspace-deployment-path : path appended to the workspace-base-path to distinguish this deployment. If left unspecified it is equal to the deployment name
  • workspace-base-path = /mnt/zoe-workspaces : Base directory where user workspaces will be created. This directory should reside on a shared filesystem visible by all hosts where containers will be run.
  • fs-group-id = 5001 : Group ID to use for all Zoe users in workspace files


  • kairosdb-enable = false : Enable gathering of usage metrics recorded in KairosDB
  • kairosdb-url = http://localhost:8090 : URL of KairosDB REST API
  • influxdb-enable = false : Enable gathering of usage metrics recorded in InfluxDB
  • kairosdb-url = http://localhost:8086 : URL of InfluxDB REST API

Service logs (see: Zoe logs and service output):

  • gelf-address : Enable Docker GELF log output to a UDP listener (ex. udp://, works only for the Swarm back-end
  • gelf-listener = 7896 : Enable the internal GELF log listener on this port, set to 0 to disable
  • service-logs-base-path = /var/lib/zoe/service-logs : Path where service logs coming from the GELF listener will be stored

PostgresQL database options:

  • dbname = zoe : DB name
  • dbuser = zoe : DB user
  • dbpass = zoe : DB password
  • dbhost = localhost : DB hostname
  • dbport = 5432 : DB port

API options:

  • listen-address : address Zoe will use to listen for incoming connections to the web interface
  • listen-port : port Zoe will use to listen for incoming connections to the web interface
  • master-url = tcp:// : address of the Zoe Master ZeroMQ API
  • cookie-secret = changeme: secret used to encrypt cookies
  • zapp-shop-path = /var/lib/zoe-apps : path to the directory containing the ZApp Shop files

Master options:

  • api-listen-uri = tcp://*:4850 : ZeroMQ server connection string, used for the master listening endpoint
  • max-core-limit = 16 : maximum amount of cores a user is able to reserve
  • max-memory-limit = 64 : maximum amount of memory a user is able to reserve
  • additional-volumes = <none> : list of additional volumes to mount in every service, for every ZApp (ex. /mnt/data:data,/mnt/data_n:data_n)


  • auth-file = zoepass.csv : Path to the CSV file containing user,pass,role lines for text authentication
  • ldap-server-uri = ldap://localhost : LDAP server to use for user authentication
  • ldap-bind-user = ou=something,dc=any,dc=local : LDAP user for binding to the server
  • ldap-bind-password = mysecretpassword : Password for the bind user
  • ldap-base-dn = ou=something,dc=any,dc=local : LDAP base DN for users

Scheduler options:

  • scheduler-class = <ZoeElasticScheduler> : Scheduler class to use for scheduling ZApps (default: elastic scheduler)
  • scheduler-policy = <FIFO | SIZE> : Scheduler policy to use for scheduling ZApps (default: FIFO)
  • placement-policy = <waterfill | random | average> : how containers should be placed on hosts (default: average)

ZApp shop:

  • zapp-shop-path = /var/lib/zoe-apps : Path where ZApp folders are stored

Back-end choice:

  • backend = <DockerEngine|Kubernetes> : cluster back-end to use to run ZApps, default is DockerEngine

Kubernetes back-end:

  • kube-config-file = /opt/zoe/kube.conf : the configuration file of Kubernetes cluster that zoe works with. Specified if backend is Kubernetes.

DockerEngine back-end:

  • backend-docker-config-file = docker.conf : name of the DockerEngine back-end configuration file
  • overlay-network-name = zoe : Name of the Docker network Zoe should use (can be overridden in the ZApp definition)

Proxy options:

By default proxy support is disabled. To configure it refer to the proxy documentation.