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authorSiri Hansen <[email protected]>2011-10-24 14:25:15 +0200
committerSiri Hansen <[email protected]>2011-11-17 16:47:29 +0100
commit281fb9929e2cdcfdaf95e0b90b3b690b78535ddb (patch)
tree2e296a38709a1fe03a9adc076e0e30ba3f25ea38 /lib/sasl
parent1e344f34bf9f3fcc0a75b2980ab79e60d4cd71fc (diff)
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Document upgrade instructions restart_new_emulator and restart_emulator
Diffstat (limited to 'lib/sasl')
-rw-r--r--lib/sasl/doc/src/appup.xml37
-rw-r--r--lib/sasl/doc/src/release_handler.xml16
-rw-r--r--lib/sasl/src/release_handler.erl6
3 files changed, 49 insertions, 10 deletions
diff --git a/lib/sasl/doc/src/appup.xml b/lib/sasl/doc/src/appup.xml
index 89bcf23b5e..195f9fe1d3 100644
--- a/lib/sasl/doc/src/appup.xml
+++ b/lib/sasl/doc/src/appup.xml
@@ -319,12 +319,37 @@ point_of_no_return
<pre>
restart_new_emulator
</pre>
- <p>Shuts down the current emulator and starts a ne one. All
- processes are terminated gracefully. The new release must still
- be made permanent when the new emulator is up and running.
- Otherwise, the old emulator is started in case of a emulator
- restart. This instruction should be used when a new emulator is
- introduced, or if a complete reboot of the system should be done.</p>
+ <p>This instruction is used when erts, kernel, stdlib or sasl is
+ upgraded. It shuts down the current emulator and starts a new
+ one. All processes are terminated gracefully, and the new
+ version of erts, kernel, stdlib and sasl are used when the
+ emulator restarts. Only one <c>restart_new_emulator</c>
+ instruction is allowed in the relup, and it shall be placed
+ first. <seealso marker="systools#make_relup/3">systools:make_relup3,4</seealso>
+ will ensure this when the relup is generated. The rest of the
+ relup script is executed after the restart as a part of the boot
+ script.</p>
+ <p>An info report will be written when the upgrade is
+ completed. To programatically find out if the upgrade is
+ complete,
+ call <seealso marker="release_handler#which_release/0">
+ release_handler:which_releases</seealso> and check if the
+ expected release has status <c>current</c>.</p>
+ <p>The new release must still be made permanent after the upgrade
+ is completed. Otherwise, the old emulator is started in case of
+ an emulator restart.</p>
+ <pre>
+restart_emulator
+ </pre>
+ <p>This instruction is similar to <c>restart_new_emulator</c>,
+ except it shall be placed at the end of the relup script. It is
+ not related to an upgrade of the emulator or the core
+ applications, but can be used by any application when a complete
+ reboot of the system is reqiured. When generating the
+ relup, <seealso marker="systools#make_relup/3">systools:make_relup/3,4</seealso>
+ ensures that there is only one <c>restart_emulator</c>
+ instruction and that it is the last instruction of the
+ relup.</p>
</section>
<section>
diff --git a/lib/sasl/doc/src/release_handler.xml b/lib/sasl/doc/src/release_handler.xml
index 5ac0dc1acc..c625b40c9d 100644
--- a/lib/sasl/doc/src/release_handler.xml
+++ b/lib/sasl/doc/src/release_handler.xml
@@ -238,7 +238,7 @@ old reboot_old permanent
</func>
<func>
<name>install_release(Vsn) -> {ok, OtherVsn, Descr} | {error, Reason}</name>
- <name>install_release(Vsn, [Opt]) -> {ok, OtherVsn, Descr} | {error, Reason}</name>
+ <name>install_release(Vsn, [Opt]) -> {ok, OtherVsn, Descr} | {continue_after_restart, OtherVsn, Descr} | {error, Reason}</name>
<fsummary>Install a release in the system.</fsummary>
<type>
<v>Vsn = OtherVsn = string()</v>
@@ -248,7 +248,8 @@ old reboot_old permanent
<v>&nbsp;Timeout = default | infinity | int()>0</v>
<v>&nbsp;Bool = boolean()</v>
<v>Descr = term()</v>
- <v>Reason = {illegal_option, Opt} | {already_installed, Vsn} | {change_appl_data, term()} | term()</v>
+ <v>Reason = {illegal_option, Opt} | {already_installed, Vsn} | {change_appl_data, term()} | {missing_base_app, OtherVsn, App} | {could_not_create_hybrid_boot, term()} | term()</v>
+ <v>App = atom()</v>
</type>
<desc>
<p>Installs the specified version <c>Vsn</c> of the release.
@@ -268,6 +269,15 @@ old reboot_old permanent
<c>OtherVsn</c> and <c>Descr</c> are the version
(<c>UpFromVsn</c> or <c>Vsn</c>) and description
(<c>Descr1</c> or <c>Descr2</c>) as specified in the script.</p>
+ <p>If <c>{continue_after_restart,OtherVsn,Descr}</c> is
+ returned, it means that the emulator will be restarted
+ before the upgrade instructions are executed. This will
+ happen if the emulator or any of the applications kernel,
+ stdlib or sasl are updated. The new version of the emulator
+ and these core applications will execute after the restart,
+ but for all other applications the old versions will be
+ started and the upgrade will be performed as normal by
+ executing the upgrade instructions.</p>
<p>If a recoverable error occurs, the function returns
<c>{error,Reason}</c> and the original application
specifications are restored. If a non-recoverable error
@@ -442,7 +452,7 @@ release_handler:set_unpacked(RelFile, [{myapp,"1.0","/home/user"},...]).
and evaluated exactly in the same way as <c>release_handler</c>
does.</p>
<warning>
- <p>These function is primarily intended for simplified testing of
+ <p>These functions are primarily intended for simplified testing
of <c>.appup</c> files. They are not run within the context of
the <c>release_handler</c> process. They must therefore
<em>not</em> be used together with calls to
diff --git a/lib/sasl/src/release_handler.erl b/lib/sasl/src/release_handler.erl
index abe6d6bee6..87660db3e3 100644
--- a/lib/sasl/src/release_handler.erl
+++ b/lib/sasl/src/release_handler.erl
@@ -193,11 +193,15 @@ check_check_install_options([],Purge) ->
%%-----------------------------------------------------------------
%% Purpose: Executes the relup script for the specified version.
%% The release must be unpacked.
-%% Returns: {ok, FromVsn, Descr} | {error, Reason}
+%% Returns: {ok, FromVsn, Descr} |
+%% {continue_after_restart, FromVsn, Descr} |
+%% {error, Reason}
%% Reason = {already_installed, Vsn} |
%% {bad_relup_file, RelFile} |
%% {no_such_release, Vsn} |
%% {no_such_from_vsn, Vsn} |
+%% {could_not_create_hybrid_boot,Why} |
+%% {missing_base_app,Vsn,App} |
%% {illegal_option, Opt}} |
%% exit_reason()
%%-----------------------------------------------------------------