Document HA option about doc-cap HOT 8 CLOSED

Nice perl-fu, @mook-as. Thanks!

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How is config.HA used? Are there any internal docs? It is not in the UAA or SCF values.yaml files.

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Interesting; we had that in there as a development shortcut to start the smallest HA configuration and didn't intend that to be used by customers (since they would probably want to customize things to suit their deployment scenarios). I didn't know of a decision to change that status.

In case we do want to actually document it: config.HA (previously known as sizing.HA), when set to true, will change any roles at the default size (of 1) to be a minimal HA deployment instead; for example, there will be multiple router instances. The number of instances is listed in the comment in the helm values file (helm inspect values suse/cf); for example, # For high availability it needs at least 2 instances.

Note that we only check if the number of instances is at the default, not if you have set it; this means you can't explicitly set "HA but 1 router", because it just assumes that was the default and overrides it to 2 instances instead.

Please check with… somebody that we want this to be documented before writing all this down, of course :)

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@mook-as I was looking for a literal config.HA option, not

config:
  # Flag to activate high-availability mode
  HA: false

Think literal for us lowly end lusers :)

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But it's the same thing; the helm command line accepts things by joining the nesting levels with dots (.), as in --set config.HA=true to modify the option you quoted :)

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Thanks! See if this works for you.
http://docserv.nue.suse.com/documents/CAP_1/cap-deployment/single-html/#sec.cap.ha-prod

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Hi! Sorry, I dropped this on the floor because Hack Week :D

Reviewing https://susedoc.github.io/doc-cap/develop/cap-deployment/html/cha.cap.install-production.html#sec.cap.ha-prod :

• There's no need to actually download the chart: helm inspect values suse/uaa | perl -ne '/^sizing/..0 and do { print $.,":",$_ if /^ [a-z]/ || /high avail|scale|count/ }' (a combination of the two commands we already have) works fine
• Passing --set config.HA=true works, but is more likely to be error-prone in the future (because when you need to upgrade or something you're likely to forget). But that's generally true of using --set, whatever the situation.

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1451ecd

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