edeliver_fork v1.4.5 Edeliver.Relup.Instructions.CheckProcessesRunningOldCode
Cancels the upgrade if there are processes running old code
from previous upgrades. This upgrade instruction checks whether any of the modules that will be (re)loaded during upgrade has old code. If any of them has old code it will throw an error and abort the release upgrade. This prevents crashing and restarting the node during the live upgrade. This instruction is insterted before the “point of no return” which causes it to run twice, once when checking the relup and once when executing the relup.
Summary
Functions
Specs
arguments(%Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term}, Edeliver.Relup.Config.t) :: term
Returns the modules which will be loaded during the upgrade.
These modules are taken as argument for the run/1
function and only
these modules are checked whether they run old code. Modules which
will not be updated during the upgrade does not affect the upgrade
process even if they run old code. The modules to check are take from
the load_object_code
instructions.
Specs
call_this(arguments :: [term]) ::
Instruction.instruction |
Instruction.instructions
Calls the run/1
function of this module
from the relup file during hot code upgrade
Specs
insert_where :: Instruction.insert_fun
Inserts the instruction before the point of no return.
This causes the release handler to abort the upgrade
already when running :release_handler.check_install_release/1
if this instruction fails.