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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2015-07-07 21:11:25 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska-skaware@skarnet.org> | 2015-07-07 21:11:25 +0000 |
| commit | 087097faa52791f941daaab5c14200a470f6aebe (patch) | |
| tree | 0c67da3555db702f20e9418ab4e3d5b48992f868 /doc/s6-rc-upgrade.html | |
| parent | a491c627e09aa1149196dd40cb377d181db0580a (diff) | |
| download | s6-rc-087097faa52791f941daaab5c14200a470f6aebe.tar.xz | |
- More doc!
- Cosmetic fixes in s6-rc-compile
Diffstat (limited to 'doc/s6-rc-upgrade.html')
| -rw-r--r-- | doc/s6-rc-upgrade.html | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/doc/s6-rc-upgrade.html b/doc/s6-rc-upgrade.html deleted file mode 100644 index bdaa090..0000000 --- a/doc/s6-rc-upgrade.html +++ /dev/null @@ -1,174 +0,0 @@ -<html> - <head> - <meta name="viewport" content="width=device-width, initial-scale=1.0" /> - <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> - <meta http-equiv="Content-Language" content="en" /> - <title>s6-rc: the s6-rc-update program</title> - <meta name="Description" content="s6-rc: the s6-rc-update program" /> - <meta name="Keywords" content="s6-rc command rc update s6-rc-update init dependency state management services" /> - <!-- <link rel="stylesheet" type="text/css" href="http://skarnet.org/default.css" /> --> - </head> -<body> - -<p> -<a href="index.html">s6-rc</a><br /> -<a href="http://skarnet.org/software/">Software</a><br /> -<a href="http://skarnet.org/">skarnet.org</a> -</p> - -<h1> The s6-rc-update program </h1> - -<p> - s6-rc-update is an <em>online service database switcher</em>: -it will replace your compiled service database with another -one, and adjust the live state accordingly. -</p> - -<p> - Live upgrading a service database is no small feat, and no -fully automated system can get it right in all cases. -s6-rc-update will do its best on its own, but it lets you -give it instructions to handle -difficult cases; and rather than implement doubtful -heuristics, it will fail with an error message in -situations it really cannot solve. -</p> - -<h2> Interface </h2> - -<pre> - s6-rc [ -v <em>verbosity</em> ] [ <em>servicenames...</em> ] -</pre> - -<ul> - <li> s6-rc expects to find a <em>compiled service database</em> -in <tt>/etc/s6-rc/compiled</tt> and a <em>live state</em> in -<tt>/s6/s6-rc</tt>. If it cannot find that data, it complains and -exits. - <ul> - <li> The <em>compiled service database</em> is built offline -via the <a href="s6-rc-compile.html">s6-rc-compile</a> tool. </li> - <li> The <em>live state</em> should be initialized at boot time -via the <a href="s6-rc-init.html">s6-rc-init</a> tool. It is then -maintained by s6-rc itself. </li> - </ul> </li> - <li> The command line arguments <em>servicenames...</em> define a set -of selected services the user wants to act on. </li> - <li> s6-rc computes the necessary transitions to bring the machine -to the desired state - by default a state where all the -services listed on the command line are up. If asked to, it performs -those transitions. </li> - <li> s6-rc processes services as soon as they can be processed. It -will wait until a service is up to start a dependent service, but it -will start two independent services in parallel. </li> - <li> If every state transition completes successfully, s6-rc exits 0. </li> - <li> If a state transition fails, s6-rc will not perform the transitions -that depend on it. It will wait until all the other independent transitions -are done, then exit 1. </li> -</ul> - -<h2> Options </h2> - -<h3> s6-rc control </h3> - -<ul> - <li> <tt>-v <em>verbosity</em></tt> : be more or less -verbose. Default is 1: warning and error messages will be printed to -stderr. 0 silences warnings. 2 writes information messages whenever -s6-rc performs a transition. 3 or more is debug info. </li> - <li> <tt>-n <em>dryruntimeout</em></tt> : dry run. -s6-rc will pretend to perform transitions, but will replace all its -program invocations by a call to -<a href="s6-rc-dryrun">s6-rc-dryrun</a>, which will do nothing but -print the command line s6-rc would have executed, then sleep for -<em>dryruntimeout</em> milliseconds before reporting success. </li> - <li> <tt>-t <em>timeout</em></tt> : timeout. If s6-rc -isn't done after <em>timeout</em> milliseconds, it will exit, leaving -the live state as it is at exit time. It does not kill its children, so -a child may successfully complete afterwards and the live state will -not be updated; in that case, subsequent s6-rc invocations will notice -and correctly update it. </li> - <li> <tt>-c <em>compiled</em></tt> : look for the -compiled service database in <em>compiled</em>. Default is -<tt>/etc/s6-rc/compiled</tt> </li> - <li> <tt>-l <em>live</em></tt> : look for the -live state in <em>live</em>. Default is -<tt>/s6/s6-rc</tt> </li> -</ul> - -<h3> Up or down </h3> - -<ul> - <li> <tt>-u</tt> : selected services are interpreted -as to be brought <em>up</em>. This is the default. </li> - <li> <tt>-d</tt> : selected services are interpreted -as to be brought <em>down</em>. </li> -</ul> - -<h3> Service selection </h3> - -<ul> - <li> <tt>-p</tt> : prune. The state will be brought to -<em>exactly</em> <em>servicenames...</em>, plus their dependencies, and -the other services will be brought down. With the <tt>-d</tt> option, -the meaning is reversed: the state will be brought to the maximum -possible set that does not include <em>servicenames...</em>. </li> - <li> <tt>-a</tt> : all. Add the current set of active services to -the selected set. This is useful to ensure consistency of the machine -state, for instance, and also at shutdown time: <tt>s6-rc -da</tt> -will stop all the currently active services. </li> -</ul> - -<h3> Actions </h3> - -<ul> - <li> <tt>-C</tt> : check. s6-rc will check the consistency of the -database, and exit with an error message if it finds errors. </li> - <li> <tt>-L</tt> : list. s6-rc will resolve the given names, then -print the list of corresponding atomic services to stdout, without taking their -dependencies into account. It will print an empty line afterwards. </li> - <li> <tt>-A</tt> : list all. s6-rc will print the list of selected -atomic services to stdout, after computing dependencies. Note that with -the <tt>-d</tt> option, it computes reverse dependencies instead. </li> - <li> <tt>-S</tt> : state change. A state change will be performed -for the selected services. -This is the default if no other action option has been given. </li> -</ul> - -<h2> Usage examples </h2> - -<pre> s6-rc <em>myservicebundle</em> </pre> -<p> - Brings up all the services represented by <em>myservicebundle</em>, -dependencies first. -</p> - -<pre> s6-rc -Sad </pre> -<p> - Brings down all the services in an orderly manner. This is typically -run at shutdown time. -</p> - -<pre> s6-rc -Au <em>myservicebundle</em> </pre> -<p> - Prints the names of all atomic services represented by -<em>myservicebundle</em>, as well as everything they depend on. -</p> - -<pre> s6-rc -Ad <em>myservicebundle</em> </pre> -<p> - Prints the names of all atomic services represented by -<em>myservicebundle</em>, as well as everything that depends on them. -</p> - -<pre> s6-rc -pun0 <em>myservicebundle</em> </pre> -<p> - Prints what s6-rc would do to bring the state to just -<em>myservicebundle</em> and its dependencies. -</p> - - -<h2> Internals </h2> - -</body> -</html> |