Unit states

The unit status is the way to know what is happening with a unit. You can use thetsuru app-info -a <appname> to see the unit status:

  1. $ tsuru app-info -a tsuru-dashboard
  2. Application: tsuru-dashboard
  3. Repository: git@localhost:tsuru-dashboard.git
  4. Platform: python
  5. ...
  6. Units: 1
  7. +------------+---------+
  8. | Unit       | State   |
  9. +------------+---------+
  10. | 9cf863c2c1 | started |
  11. +------------+---------+

The unit state flow is:

  1. +----------+                           start          +---------+
  2. | building |                   +---------------------+| stopped |
  3. +----------+                   |                      +---------+
  4.       ^                        |                           ^
  5.       |                        |                           |
  6.  deploy unit                   |                         stop
  7.       |                        |                           |
  8.       +                        v       RegisterUnit        +
  9.  +---------+  app unit   +----------+  SetUnitStatus  +---------+
  10.  | created | +---------> | starting | +-------------> | started |
  11.  +---------+             +----------+                 +---------+
  12.                                +                         ^ +
  13.                                |                         | |
  14.                          SetUnitStatus                   | |
  15.                                |                         | |
  16.                                v                         | |
  17.                            +-------+     SetUnitStatus   | |
  18.                            | error | +-------------------+ |
  19.                            +-------+ <---------------------+
  • created: is the initial status of an unit.
  • building: is the status for units being provisioned by the provisioner, like during deployment.
  • error: is the status for units that failed to start, because of an application error.
  • starting: is set when the container is started in docker.
  • started: is for cases where the unit is up and running.
  • stopped: is for cases where the unit has been stopped.

原文: https://docs.tsuru.io/1.6/using/unit-states.html