jschoubben
ac42d89391
Three guards, each silent when nothing is at stake: - settings: show reads a layer; set says what it adds, changes and removes, refuses a removal without --replace, and keeps the layer it replaced (settings_history, migration 0057). - push: plan --diff compares with what the machine was last sent, now kept as a summary that holds no file content; push with no machine needs --all. - a running container whose mount would point at another directory holds that machine's push until --move names the module; the other machines go ahead.
27 lines
1.5 KiB
SQL
27 lines
1.5 KiB
SQL
-- What a change replaces (novox/hq ADR 0217, to-be 44).
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--
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-- Two records the mesh did not keep, and each time a change took effect unseen it was the one
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-- missing. A settings layer is replaced whole, and the layer it replaced was nowhere: on 2026-10-05
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-- one placement set for one module on one machine dropped that machine's whole layer for it, and
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-- the old one was read back from a database backup (issue 246). And of what a machine was sent the
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-- mesh kept only a digest — enough to say *whether* it changed, never *what*.
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-- Every layer that was replaced or cleared, with when it had been set and when it went. Not a
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-- foreign key to settings: the row it was is the row being replaced.
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create table settings_history (
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node uuid references node(id) on delete cascade,
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module text not null,
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values jsonb not null,
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set_at timestamptz,
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replaced_at timestamptz not null default now(),
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-- set · clear
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replaced_by text not null
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);
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create index settings_history_by_layer on settings_history (module, node, replaced_at desc);
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-- What a machine was last sent, summarised: per resource its id, type, a digest of it and of each
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-- field, and a container's mounts. Not the declaration: a file's content may carry a secret, and
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-- this lands in the store's backups. Read only to compare a plan with what was sent; what a machine
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-- *should* be is composed from the mesh's records every time, as before (migration 0014).
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alter table node add column sent_summary jsonb;
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