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worker job from concourse/5.5.1

The 'worker' nodes are what actually run Concourse workloads (builds, resource checking, etc). They register with Concourse via the SSH worker gateway running on the 'web' nodes.

Github source: fcc330f or master branch

Properties

baggageclaim

bind_port

Port on which Baggageclaim should listen for HTTP traffic.

Default
7788

disable_user_namespaces

Disable remapping of user/group IDs in unprivileged volumes.

For use in combination with ‘garden.use_houdini’.

Default
detect

driver

Driver to use for the volume store. One of detect, overlay, btrfs, or naive.

Default
detect

certs_path

A path to a directory on the instance to create the resource certificates volume from.

Default
/etc/ssl/certs

connection_drain_timeout

Duration after which a worker should give up draining forwarded connections on shutdown.

Default
1h

container_sweeper_max_in_flight

Maximum number of containers which can be swept in parallel.

debug

bind_ip

IP address on which to listen for the pprof debugger endpoints.

Default
127.0.0.1

bind_port

Port on which to listen for the pprof debugger endpoints.

Default
7776

drain_timeout

Maximum wait time in Go duration format (1m = 1 minute) for worker drain to be finished. Only applies when worker is getting shutdown.

Default
1h

ephemeral

If set, the worker will immediately disappear upon stalling.

Default
false

external_garden_url

API endpoint of an externally managed Garden server to use instead of running the embedded Garden server.

garden

allow_host_access

Allow containers to reach the worker VM’s network.

Default
false

deny_networks

Network ranges to which traffic from containers will be denied.

Example
[]

dns_servers

DNS servers IP addresses to use instead of automatically propagating the host’s DNS configuration.

Example
[]

use_houdini

Use the insecure Houdini Garden backend.

If specified, the other garden.* properties have no effect.

healthcheck

bind_ip

IP address on which to listen for health checking requests.

bind_port

Port on which to listen for health checking requests.

timeout

HTTP timeout for the full duration of health checking.

http_proxy_url

Proxy to use for outgoing http requests from containers.

https_proxy_url

Proxy to use for outgoing https requests from containers.

log_level

The log level for the worker. When set to debug, you’ll see a lot more information.

Default
info

no_proxy

A list domains and IPs with optional port for which the proxy should be bypassed.

Example
- localhost
- 127.0.0.1
- example.com
- domain.com:8080

sweep_interval

Interval on which to destroy containers and volumes marked for garbage collection.

Default
30s

tags

An array of tags to advertise for each worker.

Example
- special

team

Register the worker for a single team.

If not specified, the worker will be shared across all teams.

volume_sweeper_max_in_flight

Maximum number of volumes which can be swept in parallel.

worker_gateway

host_public_key

Public key to verify for the TSA server. If not specified, the web link is used.

Example
ssh-rsa ...

hosts

Addresses (host:port) of TSA servers to register with.

If not specified, the web link is used.

rebalance_interval

The interval on which the worker will connect to a new SSH gateway and drain the old connection. This has the effect of rebalancing the forwarded workers across the SSH gateways over time.

If not specified, the worker will not rebalance over time, and instead stick with whichever SSH gateway it initially connected to.

worker_key

SSH key to use when authenticating with the TSA.

Example
private_key: |+
  -----BEGIN RSA PRIVATE KEY-----
  ...
  -----END RSA PRIVATE KEY-----
public_key: ssh-rsa ...

Templates

Templates are rendered and placed onto corresponding instances during the deployment process. This job's templates will be placed into /var/vcap/jobs/worker/ directory (learn more).

  • bin/concourse_start (from concourse_start.erb)
  • bin/concourse_stop (from concourse_stop.erb)
  • bin/ctl (from ctl.erb)
  • bin/drain (from drain.erb)
  • bin/pre_start (from pre_start.erb)
  • config/concourse.service (from concourse.service)
  • config/env.sh (from env.sh.erb)
  • config/worker_gateway_host_key.pub (from worker_gateway_host_key.pub.erb)

Packages

Packages are compiled and placed onto corresponding instances during the deployment process. Packages will be placed into /var/vcap/packages/ directory.