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doc: explain the systemd commands of marsadm
This commit is contained in:
Thomas Schoebel-Theuer
parent
069cb6ca62
commit
61e85f04b5
@ -22985,6 +22985,812 @@ Postcondition:
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\end_inset
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\end_layout
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\begin_layout Subsection
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\family typewriter
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systemd
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\family default
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Control Commands
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\begin_inset CommandInset label
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LatexCommand label
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name "subsec:systemd-Control-Commands"
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\end_inset
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\end_layout
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\begin_layout Standard
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These are optional commands when you want to use systemd for control of
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your services running on top of MARS, and for more automated handover /
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failover.
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The concept is described in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "sec:systemd-Templates"
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plural "false"
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caps "false"
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noprefix "false"
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\end_inset
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.
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\end_layout
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\begin_layout Standard
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="6" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\size scriptsize
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Command / Params
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\size scriptsize
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Cmp
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\end_layout
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\end_inset
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</cell>
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\size scriptsize
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Description
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="left" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\family typewriter
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\size scriptsize
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\begin_inset Box Frameless
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position "t"
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hor_pos "c"
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has_inner_box 1
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inner_pos "t"
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use_parbox 0
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use_makebox 0
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width "20col%"
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special "none"
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height "1in"
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height_special "totalheight"
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thickness "0.4pt"
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separation "3pt"
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shadowsize "4pt"
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framecolor "black"
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backgroundcolor "none"
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status open
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\begin_layout Plain Layout
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\family typewriter
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\size scriptsize
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systemd-trigger
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\end_layout
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\end_inset
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\size scriptsize
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no
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\end_layout
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\end_inset
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</cell>
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<cell alignment="left" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\size scriptsize
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\begin_inset Box Frameless
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position "t"
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hor_pos "c"
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has_inner_box 1
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inner_pos "t"
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use_parbox 0
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use_makebox 0
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width "60col%"
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special "none"
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height "1in"
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height_special "totalheight"
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thickness "0.4pt"
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separation "3pt"
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shadowsize "4pt"
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framecolor "black"
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backgroundcolor "none"
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status open
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\begin_layout Plain Layout
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\size scriptsize
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Tell the macro processor engine of marsadm that some systemd templates and/or
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configurations have changed.
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This will automatically re-compute any necessary systemd units residing
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in
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\family typewriter
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/run/systemd/system/
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\family default
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from template files provided in one of the directories from
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\family typewriter
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@MARS_PATH/$SYSTEMD_SUBDIR/
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\family default
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, and will automatically remove any
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\emph on
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instances
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\emph default
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(not templates) which are no longer needed.
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Finally,
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\family typewriter
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systemctl reload-daemon
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\family default
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is executed, and any necessary units are started / stopped according to
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the new situation.
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\begin_inset Newline newline
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\end_inset
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The macro language behind the template engine is described in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "sec:systemd-Templates"
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plural "false"
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caps "false"
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noprefix "false"
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\end_inset
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.
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\size default
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\begin_inset Newline newline
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\end_inset
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\begin_inset Graphics
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filename images/lightbulb_brightlit_benj_.png
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lyxscale 12
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scale 7
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\end_inset
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\size scriptsize
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When combined with
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\family typewriter
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--force
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\family default
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, this will forcefully re-compute any template instances, even when already
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created before.
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Without
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\family typewriter
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--force
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\family default
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, there is an internal check whether re-creation is necessary.
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This check might be fooled by manual intervention into
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\family typewriter
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/run/systemd/system/
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\family default
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, so
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\family typewriter
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--force
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\family default
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will repair it.
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\end_layout
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\end_inset
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\family typewriter
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\size scriptsize
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\begin_inset Box Frameless
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position "t"
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hor_pos "c"
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has_inner_box 1
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inner_pos "t"
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use_parbox 0
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use_makebox 0
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width "20col%"
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special "none"
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height "1in"
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height_special "totalheight"
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thickness "0.4pt"
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separation "3pt"
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shadowsize "4pt"
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framecolor "black"
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backgroundcolor "none"
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status open
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\begin_layout Plain Layout
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\family typewriter
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\size scriptsize
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set-systemd-unit
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\begin_inset Newline newline
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\end_inset
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\begin_inset ERT
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status open
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\begin_layout Plain Layout
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\backslash
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strut
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\backslash
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hfill
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\end_layout
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\end_inset
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$res
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\begin_inset Newline newline
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\end_inset
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\begin_inset ERT
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status open
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\begin_layout Plain Layout
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\backslash
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strut
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\backslash
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hfill
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\end_layout
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\end_inset
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$start_unit
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\begin_inset Newline newline
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\end_inset
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\begin_inset ERT
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status open
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\begin_layout Plain Layout
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\backslash
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strut
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\backslash
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hfill
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\end_layout
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\end_inset
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$stop_unit
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\end_layout
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\end_inset
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\size scriptsize
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no
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\size scriptsize
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\begin_inset Box Frameless
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position "t"
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hor_pos "c"
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has_inner_box 1
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inner_pos "t"
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use_parbox 0
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use_makebox 0
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width "60col%"
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special "none"
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height "1in"
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height_special "totalheight"
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thickness "0.4pt"
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separation "3pt"
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shadowsize "4pt"
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framecolor "black"
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backgroundcolor "none"
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status open
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\begin_layout Plain Layout
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\size scriptsize
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Assign new start and unit names to a resource, or delete any existing names
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when the empty string
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\family typewriter
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\begin_inset Quotes eld
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\end_inset
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\begin_inset Quotes erd
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\end_inset
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\family default
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is provided as
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\family typewriter
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$start_unit
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\family default
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.
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Afterwards, a
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\family typewriter
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systemd-trigger
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\family default
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is executed, which causes start / stop operations according to the new
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situation.
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\end_layout
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\end_inset
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\family typewriter
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\size scriptsize
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\begin_inset Box Frameless
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position "t"
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hor_pos "c"
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has_inner_box 1
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inner_pos "t"
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use_parbox 0
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use_makebox 0
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width "20col%"
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special "none"
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height "1in"
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height_special "totalheight"
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thickness "0.4pt"
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separation "3pt"
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shadowsize "4pt"
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framecolor "black"
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backgroundcolor "none"
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status open
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\begin_layout Plain Layout
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\family typewriter
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\size scriptsize
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get-systemd-unit
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\begin_inset Newline newline
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\end_inset
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\begin_inset ERT
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status open
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\begin_layout Plain Layout
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\backslash
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strut
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\backslash
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hfill
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\end_layout
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\end_inset
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$res
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\end_layout
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\end_inset
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|
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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|
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\begin_layout Plain Layout
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||||
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\end_layout
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|
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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||||
\begin_layout Plain Layout
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||||
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||||
\size scriptsize
|
||||
\begin_inset Box Frameless
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position "t"
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hor_pos "c"
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has_inner_box 1
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inner_pos "t"
|
||||
use_parbox 0
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||||
use_makebox 0
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||||
width "60col%"
|
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special "none"
|
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height "1in"
|
||||
height_special "totalheight"
|
||||
thickness "0.4pt"
|
||||
separation "3pt"
|
||||
shadowsize "4pt"
|
||||
framecolor "black"
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||||
backgroundcolor "none"
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\size scriptsize
|
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Report the current assignment of start and stop unit names to the given
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resource.
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\end_layout
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||||
|
||||
\end_inset
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||||
|
||||
|
||||
\end_layout
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||||
|
||||
\end_inset
|
||||
</cell>
|
||||
</row>
|
||||
<row>
|
||||
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||||
\begin_inset Text
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
\begin_inset Box Frameless
|
||||
position "t"
|
||||
hor_pos "c"
|
||||
has_inner_box 1
|
||||
inner_pos "t"
|
||||
use_parbox 0
|
||||
use_makebox 0
|
||||
width "20col%"
|
||||
special "none"
|
||||
height "1in"
|
||||
height_special "totalheight"
|
||||
thickness "0.4pt"
|
||||
separation "3pt"
|
||||
shadowsize "4pt"
|
||||
framecolor "black"
|
||||
backgroundcolor "none"
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
set-systemd-want
|
||||
\begin_inset Newline newline
|
||||
\end_inset
|
||||
|
||||
|
||||
\begin_inset ERT
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
|
||||
\backslash
|
||||
strut
|
||||
\backslash
|
||||
hfill
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
$res
|
||||
\begin_inset Newline newline
|
||||
\end_inset
|
||||
|
||||
|
||||
\begin_inset ERT
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
|
||||
\backslash
|
||||
strut
|
||||
\backslash
|
||||
hfill
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
$hostname
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
</cell>
|
||||
<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
|
||||
\begin_inset Text
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
</cell>
|
||||
<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
|
||||
\begin_inset Text
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\size scriptsize
|
||||
\begin_inset Box Frameless
|
||||
position "t"
|
||||
hor_pos "c"
|
||||
has_inner_box 1
|
||||
inner_pos "t"
|
||||
use_parbox 0
|
||||
use_makebox 0
|
||||
width "60col%"
|
||||
special "none"
|
||||
height "1in"
|
||||
height_special "totalheight"
|
||||
thickness "0.4pt"
|
||||
separation "3pt"
|
||||
shadowsize "4pt"
|
||||
framecolor "black"
|
||||
backgroundcolor "none"
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\size scriptsize
|
||||
Manually override the host where $start_unit should appear.
|
||||
This is useful for a temporary stop of the applicatiom stack when $hostname
|
||||
has the special value
|
||||
\family typewriter
|
||||
|
||||
\begin_inset Quotes eld
|
||||
\end_inset
|
||||
|
||||
(none)
|
||||
\begin_inset Quotes erd
|
||||
\end_inset
|
||||
|
||||
|
||||
\family default
|
||||
.
|
||||
See the
|
||||
\family typewriter
|
||||
fsck
|
||||
\family default
|
||||
example in section
|
||||
\begin_inset CommandInset ref
|
||||
LatexCommand nameref
|
||||
reference "sec:systemd-Templates"
|
||||
plural "false"
|
||||
caps "false"
|
||||
noprefix "false"
|
||||
|
||||
\end_inset
|
||||
|
||||
.
|
||||
\begin_inset Newline newline
|
||||
\end_inset
|
||||
|
||||
In split brain situations, it
|
||||
\emph on
|
||||
might
|
||||
\emph default
|
||||
be useful for manual override, but notice that
|
||||
\family typewriter
|
||||
marsadm primary –force
|
||||
\family default
|
||||
should be preferred because it switches
|
||||
\emph on
|
||||
both
|
||||
\emph default
|
||||
the designated primary
|
||||
\emph on
|
||||
and
|
||||
\emph default
|
||||
the application stack.
|
||||
Notice that the application stack won't actually start at a location where
|
||||
|
||||
\family typewriter
|
||||
/dev/mars/$res
|
||||
\family default
|
||||
is not present.
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
</cell>
|
||||
</row>
|
||||
<row>
|
||||
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
|
||||
\begin_inset Text
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
\begin_inset Box Frameless
|
||||
position "t"
|
||||
hor_pos "c"
|
||||
has_inner_box 1
|
||||
inner_pos "t"
|
||||
use_parbox 0
|
||||
use_makebox 0
|
||||
width "20col%"
|
||||
special "none"
|
||||
height "1in"
|
||||
height_special "totalheight"
|
||||
thickness "0.4pt"
|
||||
separation "3pt"
|
||||
shadowsize "4pt"
|
||||
framecolor "black"
|
||||
backgroundcolor "none"
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\family typewriter
|
||||
\size scriptsize
|
||||
get-systemd-want
|
||||
\begin_inset Newline newline
|
||||
\end_inset
|
||||
|
||||
|
||||
\begin_inset ERT
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
|
||||
\backslash
|
||||
strut
|
||||
\backslash
|
||||
hfill
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
$res
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
</cell>
|
||||
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
|
||||
\begin_inset Text
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\size scriptsize
|
||||
no
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
</cell>
|
||||
<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
|
||||
\begin_inset Text
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\size scriptsize
|
||||
\begin_inset Box Frameless
|
||||
position "t"
|
||||
hor_pos "c"
|
||||
has_inner_box 1
|
||||
inner_pos "t"
|
||||
use_parbox 0
|
||||
use_makebox 0
|
||||
width "60col%"
|
||||
special "none"
|
||||
height "1in"
|
||||
height_special "totalheight"
|
||||
thickness "0.4pt"
|
||||
separation "3pt"
|
||||
shadowsize "4pt"
|
||||
framecolor "black"
|
||||
backgroundcolor "none"
|
||||
status open
|
||||
|
||||
\begin_layout Plain Layout
|
||||
|
||||
\size scriptsize
|
||||
Report the current systemd start location for the given resource.
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
|
||||
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
</cell>
|
||||
</row>
|
||||
</lyxtabular>
|
||||
|
||||
\end_inset
|
||||
|
||||
|
||||
\end_layout
|
||||
|
||||
\begin_layout Subsection
|
||||
|
||||
Loading…
Reference in New Issue
Block a user