edeliver v1.2.6 Edeliver.Relup.Instructions.CheckRanchAcceptors

This upgrade instruction checks whether the ranch acceptors can be found.

This instruction will cause the upgrade to be canceled if the ranch acceptors cannot be found and because it is insterted before the “point of no return” it will run twice, once when checking the relup and once when executing the relup.

Summary

Types

insert_fun()

instruction()

instructions()

Functions

arguments(instructions, config)

Returns the name of the application

call_this(arguments \\ [])

Calls the run/1 function of this module

debug(message)

Logs a debug message using the Logger on the running node which is upgraded

dependencies()

Callback implementation for Edeliver.Relup.RunnableInstruction.dependencies/0

endpoint(otp_application_name)

Returns the pid of the phoenix endpoint supervisor

ensure_dependencies_loaded_before_instruction_for_upgrade(instructions, call_this_instruction, dependencies \\ dependencies())

Ensures that all Edeliver.Relup.RunnableInstruction modules used / referenced by this instruction and returned by the dependencies/0 callback are loaded before this instruction is executed during the upgrade

ensure_dependencies_unloaded_after_instruction_for_downgrade(instructions, call_this_instruction, dependencies \\ dependencies())

Ensures that all Edeliver.Relup.RunnableInstruction modules used / referenced by this instruction and returned by the dependencies/0 callback are unloaded after this instruction is executed during the downgrade

error(message)

Logs an error using the Logger on the running node which is upgraded

format_in_upgrade_script(format, arguments)

Formats and prints the message on the node

info(message)

Logs an info message using the Logger on the running node which is upgraded

insert_where()

Inserts the instruction before the point of no return

log_in_upgrade_script(type, message)

Logs the message of the given type on the node

modify_relup(instructions, config)

Callback implementation for Edeliver.Relup.Instruction.modify_relup/2

ranch_acceptors(ranch_acceptors_sup)

Gets the supervisor child ids of the ranch socket accecptors

ranch_acceptors_sup(ranch_listener_sup)

Gets the pid of the supervisor which supervises the ranch socket acceptors

ranch_listener_sup(otp_application_name)

Gets the pid of the ranch listener supervisor

run(otp_application_name)

Checks whether the ranch acceptors can be found

warn(message)

Logs a warning using the Logger on the running node which is upgraded

Macros

assume(assertion, error_message)

Assumes that the pattern matches or throws an error with the given error message

Types

insert_fun :: (%Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term} | instructions, new_instructions :: instruction | instructions -> updated_instructions :: %Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term} | instructions)

instruction :: :relup.instruction

instructions :: [instruction]

Functions

arguments(instructions, config)

Specs

arguments(%Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term}, %ReleaseManager.Config{dev: term, env: term, erl: term, name: term, package: term, relx_config: term, upgrade?: term, verbosity: term, version: term}) :: term

Returns the name of the application.

This name is taken as argument for the run/1 function and is required to access the acceptor processes through the supervision tree

call_this(arguments \\ [])

Specs

call_this(arguments :: [term]) ::
  instruction |
  instructions

Calls the run/1 function of this module

from the relup file during hot code upgrade

debug(message)

Specs

debug(message :: String.t) :: no_return

Logs a debug message using the Logger on the running node which is upgraded.

In addition the same debug message is logged on the node which executes the upgrade and is displayed as output of the $APP/bin/$APP upgarde $RELEASE command.

dependencies()

Specs

dependencies :: [instruction_module :: atom]

Callback implementation for Edeliver.Relup.RunnableInstruction.dependencies/0.

endpoint(otp_application_name)

Specs

endpoint(otp_application_name :: atom) :: pid

Returns the pid of the phoenix endpoint supervisor

or throws and logs an error if it cannot be found. It supervises the Phoenix.Endpoint.Server which supervises the connections and acceptors, Phoenix.Config and the phoenix pubsub supervisor, e.g. Phoenix.PubSub.PG2.

ensure_dependencies_loaded_before_instruction_for_upgrade(instructions, call_this_instruction, dependencies \\ dependencies())

Specs

ensure_dependencies_loaded_before_instruction_for_upgrade(instructions :: %Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term}, runnable_instruction :: {:apply, {module :: atom, :run, arguments :: [term]}}, dependencies :: [instruction_module :: atom]) :: %Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term}

ensure_dependencies_unloaded_after_instruction_for_downgrade(instructions, call_this_instruction, dependencies \\ dependencies())

Specs

ensure_dependencies_unloaded_after_instruction_for_downgrade(instructions :: %Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term}, runnable_instruction :: {:apply, {module :: atom, :run, arguments :: [term]}}, dependencies :: [instruction_module :: atom]) :: %Edeliver.Relup.Instructions{changed_modules: term, down_instructions: term, down_version: term, up_instructions: term, up_version: term}

error(message)

Specs

error(message :: String.t) :: no_return

Logs an error using the Logger on the running node which is upgraded.

In addition the same error message is logged on the node which executes the upgrade and is displayed as output of the $APP/bin/$APP upgarde $RELEASE command.

format_in_upgrade_script(format, arguments)

Specs

format_in_upgrade_script(format :: char_list, arguments :: [term]) :: no_return

Formats and prints the message on the node

running the upgrade script which was started by the $APP/bin/$APP upgrade $RELEASE command.

info(message)

Specs

info(message :: String.t) :: no_return

Logs an info message using the Logger on the running node which is upgraded.

In addition the same info message is logged on the node which executes the upgrade and is displayed as output of the $APP/bin/$APP upgarde $RELEASE command.

insert_where()

Specs

insert_where :: 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.

log_in_upgrade_script(type, message)

Specs

log_in_upgrade_script(type :: :error | :warning | :info | :debug, message :: String.t) :: no_return

Logs the message of the given type on the node

which executes the upgrade and displays it as output of the $APP/bin/$APP upgrade $RELEASE command. The message is prefixed with a string derived from the message type.

modify_relup(instructions, config)

Callback implementation for Edeliver.Relup.Instruction.modify_relup/2.

ranch_acceptors(ranch_acceptors_sup)

Specs

ranch_acceptors(ranch_acceptors_sup :: pid) :: [:supervisor.child_id]

Gets the supervisor child ids of the ranch socket accecptors

(ranch_acceptor) from the ranch acceptor supervisor or throws and logs an error if the acceptors cannot be found.

ranch_acceptors_sup(ranch_listener_sup)

Specs

ranch_acceptors_sup(ranch_listener_sup :: pid) :: pid

Gets the pid of the supervisor which supervises the ranch socket acceptors.

If it cannot be found as child of the given ranch listener supervisor it throws and logs an error.

ranch_listener_sup(otp_application_name)

Specs

ranch_listener_sup(otp_application_name :: atom) :: pid

Gets the pid of the ranch listener supervisor

(:ranch_listener_sup) which supervises the ranch acceptors supervisor (:ranch_acceptors_sup) and the connections supervisor (:ranch_conns_sup). It throws and logs an error if they cannot be found in the supervison tree of the application.

run(otp_application_name)

Specs

run(otp_application_name :: atom) :: :ok

Checks whether the ranch acceptors can be found.

If not the upgrade will be canceled. This function runs twice because it is executed before the “point of no return”, once when checking the relup and once when executing the relup.

warn(message)

Specs

warn(message :: String.t) :: no_return

Logs a warning using the Logger on the running node which is upgraded.

In addition the same warning message is logged on the node which executes the upgrade and is displayed as output of the $APP/bin/$APP upgarde $RELEASE command.

Macros

assume(assertion, error_message)

Assumes that the pattern matches or throws an error with the given error message.

The error message is logged as error to the logfile using the Logger and displayed as error output by the $APP/bin/$APP upgrade $RELEASE task using the $APP/ebin/install_upgrade.escript script. If the pattern matches the variables from the matching are assigned.