2026.36

Changes

V3: Supervisor support on web-server

It is apparently typical practice to create cron servers and supervisor servers with clusters based on a web-server image. Therefore, this release adds the supervisor shims that are included in the nfs-server image as an optional service. Configuration files may be placed in the host /etc/supervisor directory and are normally expected to be placed there by the invoker bootstrap sequence. A new command.EnableService invoker command accepting a name parameter can be used to enable a systemd service such as supervisor. To use supervisor in this way, it is required that the image for a cluster is configured via cluster attributes so that the CONTAINER_IMAGE_URI metadata variable is set.

V3: shell command on web-server

Supervisor is run through the shell command, which is now provided on web servers. For mapping network shared files into the shell, the metadata variables WEBSCALE_SHARE and WEBSCALE_SHARED_DIRS is used to set the directory where the file system is mounted and a space- separated set of subdirectories (or files) that are mapped into the shell. For example, /var/www/shared/mysite.com and pub/media var are usual, respective values. Note that unlike V4 systems, the html prefix is not included and it is not possible to share at the top level.

V3: Invoker configuration from metadata

This release adds a metadata variable WEBSCALE_BOOTSTRAP that specifies a locator for a bootstrap sequence. In combination with metadata variables WEBSCALE_CUSTOMER and WEBSCALE_ENVIRONMENT, it is no longer necessary to write any files to the file system (as was formerly done in a cloud-init script).

Datadog collector

The Datadog collector is now added to all images and can be enabled by defining metadata variable DATADOG_API_KEY or by providing file /etc/datadog-agent/datadog.yaml.

New tools

New tools are added to all images:

• btop: Command line resource monitor
• mtr-tiny: Full screen ncurses traceroute tool
• ncdu: Disk usage viewer
• psmisc: Proc file system utilities
• rclone: Rsync for commercial cloud storage
• ripgrep: Recursively searches directories for a regex pattern
• wget: Retrieves files from the web

Component upgrades

Artifacts matrix

Last modified on August 11, 2026