205 lines
8.4 KiB
Go
205 lines
8.4 KiB
Go
package inventory
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"time"
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)
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// The values of the controller's record mirrors, built from the store (novox/hq ADR 0289, design 54 §1,
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// design 57 package F3).
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//
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// **Each value is built from a named list of fields, and nothing else** (design 54 §1): no epoch, no time
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// of writing and no time of the last look, so any lease holder builds the same bytes from the same record
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// and a pass over unchanged records writes nothing (ADR 0289 §1, §4). The encoding is fixed: the fields in
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// their struct's order, a declaration's maps sorted.
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// AssignmentMirrored is one assignment as the assignments mirror holds it: the module, the node, and since
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// when it is assigned there. Design 54 §1 also lists whether it is pending, the builds sent and running and
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// the seats and provisions it holds there; those join with issue 419, which builds the rest of design 54.
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type AssignmentMirrored struct {
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Node string `json:"node"`
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Module string `json:"module"`
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Assigned time.Time `json:"assigned,omitzero"`
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// RequiredBy is, for a module only pulled in by another and handed to the provisioner on this node (issue 765),
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// the module that requires it there; such a value has no time assigned. Absent for an assignment.
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RequiredBy string `json:"required-by,omitempty"`
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// Provisioning is the plan of a module handed to the provisioner on this node (novox/hq ADR 0349 clause 4,
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// design 57 P5): absent for every other, so their values are the bytes they were.
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Provisioning *Provisioning `json:"provisioning,omitempty"`
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}
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// DeclaredConfigMirrored is one registered module's config declarations as the declared-config mirror holds
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// them: the module, and each key its manifest declares — under `config`, or under its old name `settings` for a
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// module not yet moved (ADR 0348 §1) — with that declaration's listed fields. An empty object when the module
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// declares none: registered, declaring nothing.
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type DeclaredConfigMirrored struct {
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Module string `json:"module"`
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Settings map[string]DeclaredMirrored `json:"settings"`
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}
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// DeclaredMirrored is one key's declaration as the mirror holds it: **its listed fields and no other**
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// (ADR 0289 §12), and every field a declaration has (catalogue.SettingDeclaration), under the same names. The
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// mirror holds what the module's manifest declares about its config values, and mesh-config validates and
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// resolves from it (ADR 0356 §4, ADR 0348 §4, §9), so it carries the whole declaration: kind, default and why
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// of the settings form, and type, description, validation, trusted, predefined, required and runtime of the
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// config form. None is a secret: a secret lives in the vault, never in config, and the catalogue refuses a
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// default for a key whose name says secret. A field the manifest gains reaches the bus only once it is added
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// here, deliberately: a test fails until it is listed. The config form's fields are left out when unset, so a
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// module not yet moved is mirrored as it was before they were carried.
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type DeclaredMirrored struct {
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Kind string `json:"kind"`
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Default json.RawMessage `json:"default"`
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Why string `json:"why"`
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Type string `json:"type,omitempty"`
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Description string `json:"description,omitempty"`
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Enum json.RawMessage `json:"enum,omitempty"`
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Minimum *float64 `json:"minimum,omitempty"`
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Maximum *float64 `json:"maximum,omitempty"`
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Pattern string `json:"pattern,omitempty"`
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Trusted bool `json:"trusted,omitempty"`
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Predefined string `json:"predefined,omitempty"`
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Required bool `json:"required,omitempty"`
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Runtime bool `json:"runtime,omitempty"`
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}
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// DeclaredMirroredFields are the fields of a declaration the mirror carries, by their manifest names.
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var DeclaredMirroredFields = []string{"kind", "default", "why", "type", "description", "enum", "minimum", "maximum",
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"pattern", "trusted", "predefined", "required", "runtime"}
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// AssignmentsMirror is every assignment's mirrored value, keyed `<node>.<module>`, with the provisioner's plan of
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// each assignment of a module handed to it, and a value of its own for each module handed to it on a node that
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// nothing assigned there, only pulled in by another (issue 765).
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func (i *Inventory) AssignmentsMirror(ctx context.Context) (map[string][]byte, error) {
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var plans map[string]Provisioning
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if i.provisioningPlans != nil {
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var err error
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if plans, err = i.provisioningPlans(ctx); err != nil {
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return nil, fmt.Errorf("composing the provisioner's plans: %w", err)
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}
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}
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assignments, err := i.assignmentsMirrored(ctx)
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if err != nil {
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return nil, err
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}
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return AssignmentValues(assignments, plans)
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}
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func (i *Inventory) assignmentsMirrored(ctx context.Context) ([]AssignmentMirrored, error) {
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rows, err := i.store.Pool().Query(ctx,
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`select n.name, a.module, a.assigned from assignment a join node n on n.id = a.node`)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var out []AssignmentMirrored
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for rows.Next() {
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var a AssignmentMirrored
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if err := rows.Scan(&a.Node, &a.Module, &a.Assigned); err != nil {
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return nil, err
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}
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a.Assigned = a.Assigned.UTC()
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out = append(out, a)
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}
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return out, rows.Err()
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}
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// DeclaredConfigMirror is every registered module's mirrored config declarations, keyed by the module.
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func (i *Inventory) DeclaredConfigMirror(ctx context.Context) (map[string][]byte, error) {
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rows, err := i.store.Pool().Query(ctx,
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`select name, coalesce(manifest->'config', manifest->'settings', '{}'::jsonb) from module`)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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out := map[string][]byte{}
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for rows.Next() {
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var (
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d DeclaredConfigMirrored
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raw []byte
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)
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if err := rows.Scan(&d.Module, &raw); err != nil {
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return nil, err
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}
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if d.Settings, err = declaredMirrored(raw); err != nil {
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return nil, fmt.Errorf("the declarations of %s cannot be read: %w", d.Module, err)
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}
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value, err := json.Marshal(d)
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if err != nil {
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return nil, err
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}
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out[d.Module] = value
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}
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return out, rows.Err()
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}
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// declaredMirrored is a manifest's config declarations, keyed by the value, as the mirror holds them: each
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// with its listed fields, a default and an enum encoded the one way.
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func declaredMirrored(raw []byte) (map[string]DeclaredMirrored, error) {
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var declared map[string]DeclaredMirrored
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if err := json.Unmarshal(raw, &declared); err != nil {
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return nil, err
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}
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out := map[string]DeclaredMirrored{}
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for key, decl := range declared {
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var err error
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if len(decl.Default) > 0 {
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if decl.Default, err = canonical(decl.Default); err != nil {
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return nil, err
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}
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}
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if len(decl.Enum) > 0 {
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if decl.Enum, err = canonical(decl.Enum); err != nil {
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return nil, err
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}
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}
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out[key] = decl
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}
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return out, nil
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}
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// canonical is a JSON document encoded the one way: objects' keys sorted, numbers as written.
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func canonical(raw []byte) ([]byte, error) {
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dec := json.NewDecoder(bytes.NewReader(raw))
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dec.UseNumber()
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var v any
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if err := dec.Decode(&v); err != nil {
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return nil, err
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}
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return json.Marshal(v)
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}
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// PredefinedMirrorKey is the predefined-keys mirror's one key: the list kept is one record.
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const PredefinedMirrorKey = "list"
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// PredefinedMirrored is the list of predefined keys kept as its mirror holds it (design 57 K3, issue 662): the
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// keys, canonical, and the trunk build of the catalogue they came from, by its commit and generation, so a reader
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// says which list it holds. Not when it was kept: any lease holder builds the same bytes from the same record.
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type PredefinedMirrored struct {
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Keys json.RawMessage `json:"keys"`
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Repository string `json:"repository"`
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Commit string `json:"commit"`
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Generation int `json:"generation"`
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Build string `json:"build"`
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}
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// PredefinedMirror is the list of predefined keys kept, under PredefinedMirrorKey; no key while none is kept.
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func (i *Inventory) PredefinedMirror(ctx context.Context) (map[string][]byte, error) {
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kept, has, err := i.PredefinedKept(ctx)
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if err != nil || !has {
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return map[string][]byte{}, err
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}
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keys, err := kept.Keys.Canonical()
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if err != nil {
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return nil, err
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}
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value, err := json.Marshal(PredefinedMirrored{Keys: keys, Repository: kept.Repository, Commit: kept.Commit,
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Generation: kept.Generation, Build: kept.Build})
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if err != nil {
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return nil, err
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}
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return map[string][]byte{PredefinedMirrorKey: value}, nil
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}
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