ScalSun

This tool provide simple auto-scaling on upsun project.

Usage/install

Deploy the scalsun and Upsun CLI binary into your project

On .upsun/config
Add to build hook :

    hook:
        build: |
            mkdir bin
            curl -fsSL https://raw.githubusercontent.com/platformsh/cli/main/installer.sh | VENDOR=upsun bash
            curl -fsSL https://github.com/upsun/scalsun/releases/download/v0.3.0/scalsun-v0.3.0-linux-amd64.tar.gz | tar -xzf - -c bin

Add cron task every minute :

    crons:
        autoscaller:
            spec: "*/1 * * * *"
            commands:
                start: |
                    if [ "$PLATFORM_ENVIRONMENT_TYPE" = "production" ]; then
                        /app/bin/scalsun --silent --max_host_count=${H_SCALING_HOST_MAX:-3}
                    fi

On Upsun console,
Add a environment variables with your token :

env:UPSUN_CLI_TOKEN

Syntax

Usage of scalsun:
      --name string                     Apps or Service name
      --min_host_count: int             Minimum host count (default 1)
      --max_host_count int              Maximum host count (default 3)
      --min_cpu_usage_upscale float     Minimum CPU usage in % (for upscale event only) (default 75.0)
      --max_cpu_usage_downscale float   Maximum CPU usage in % (for downscale event only) (default 60.0)
      --min_mem_usage_upscale float     Minimum memory usage in % (for upscale event only) (default 80.0)
      --max_mem_usage_downscale float   Maximum memory usage in % (for downscale event only) (default 20.0)
  -v, --verbose                         Enable verbose mode
  -s, --silent                          Enable silent mode

Samples

• Auto-scale all app/service
  scalsun --silent --max_host_count=${H_SCALING_HOST_MAX:-3}
• Auto-scale only specific app (if app name is web)
  scalsun --silent --max_host_count=${H_SCALING_HOST_MAX:-3} --name=web