add level mappings

This allows to map the command exit codes to any other output level
which can then be reported by the notification plugin.
With the provided colors, the frontend will show them accordingly.

cmd/monfront/main.go

@@ -26,6 +26,29 @@ type (
 		DB     string `json:"db"`
 		Listen string `json:"listen"`
 	}
+
+	Context struct {
+		Mappings map[int]map[int]MapEntry
+		Checks   []check
+	}
+
+	MapEntry struct {
+		Title string
+		Color string
+	}
+
+	check struct {
+		NodeName    string
+		CommandName string
+		CheckID     int64
+		MappingId   int
+		State       int
+		Notify      bool
+		Enabled     bool
+		Notice      sql.NullString
+		NextTime    time.Time
+		Msg         string
+	}
 )
 
 func main() {
@@ -149,21 +172,10 @@ func showChecks(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	type check struct {
-		NodeName    string
-		CommandName string
-		CheckID     int64
-		State       int
-		Notify      bool
-		Enabled     bool
-		Notice      sql.NullString
-		NextTime    time.Time
-		Msg         string
-	}
 	checks := []check{}
 	for rows.Next() {
 		c := check{}
-		err := rows.Scan(&c.CheckID, &c.NodeName, &c.CommandName, &c.State, &c.Notify, &c.Enabled, &c.Notice, &c.NextTime, &c.Msg)
+		err := rows.Scan(&c.CheckID, &c.NodeName, &c.CommandName, &c.MappingId, &c.State, &c.Notify, &c.Enabled, &c.Notice, &c.NextTime, &c.Msg)
 		if err != nil {
 			w.WriteHeader(http.StatusInternalServerError)
 			w.Write([]byte("problems with the database"))
@@ -181,8 +193,17 @@ func showChecks(w http.ResponseWriter, r *http.Request) {
 		log.Printf("could not parse template: %s", err)
 		return
 	}
+	con := Context{
+		Checks: checks,
+	}
+	if err := loadMappings(&con); err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte("problem with the mappings"))
+		log.Printf("could not load mappings: %s", err)
+		return
+	}
 	w.Header()["Content-Type"] = []string{"text/html"}
-	if err := tmpl.Execute(w, checks); err != nil {
+	if err := tmpl.Execute(w, con); err != nil {
 		w.WriteHeader(http.StatusInternalServerError)
 		w.Write([]byte("problem with a template"))
 		log.Printf("could not execute template: %s", err)
@@ -193,6 +214,7 @@ func showChecks(w http.ResponseWriter, r *http.Request) {
 
 func showUnhandledHosts(w http.ResponseWriter, r *http.Request) {
 }
+
 func showUnhandledGroups(w http.ResponseWriter, r *http.Request) {
 	rows, err := DB.Query(SQLShowUnhandledGroups)
 	if err != nil {
@@ -236,8 +258,40 @@ func showUnhandledGroups(w http.ResponseWriter, r *http.Request) {
 	return
 }
 
+func loadMappings(c *Context) error {
+	c.Mappings = map[int]map[int]MapEntry{}
+	rows, err := DB.Query(SQLShowMappings)
+	if err != nil {
+		return err
+	}
+
+	for rows.Next() {
+		if rows.Err() != nil {
+			return rows.Err()
+		}
+		var (
+			mapId  int
+			target int
+			title  string
+			color  string
+		)
+		if err := rows.Scan(&mapId, &target, &title, &color); err != nil {
+			return err
+		}
+		ma, found := c.Mappings[mapId]
+		if !found {
+			ma = map[int]MapEntry{}
+			c.Mappings[mapId] = ma
+		}
+		ma[target] = MapEntry{Title: title, Color: color}
+	}
+	return nil
+}
+
 var (
-	SQLShowChecks = `select c.id, n.name, co.name, ac.states[1] as state, ac.notify,
+	SQLShowMappings = `select mapping_id, target, title, color
+	from mapping_level`
+	SQLShowChecks = `select c.id, n.name, co.name, ac.mapping_id, ac.states[1] as state, ac.notify,
 	ac.enabled, ac.notice, ac.next_time, ac.msg
   from active_checks ac
 	join checks c on ac.check_id = c.id
@@ -280,10 +334,15 @@ var (
 			form nav { display: flex; flex-direction: column; }
 			form nav > * { margin: 0.5em; }
 			table td, table th { padding: 0.5em; }
-		  td.state-0 { background: green; }
+			{{ range $mapId, $mapping := .Mappings }}
+			{{ range $target, $val := $mapping }}
+			td.state-{{ $mapId }}-{{ $target }} { background: {{ $val.Color }}; }
+			{{ end }}
+			{{ end }}
+		 /* td.state-0 { background: green; }
 		  td.state-1 { background: orange; }
 		  td.state-2 { background: red; }
-		  td.state-99 { background: gray; }
+		  td.state-99 { background: gray; } */
 		</style>
 	</head>
 	<body>
@@ -321,11 +380,12 @@ var (
 						<thead><tr><th></th><th>host</th><th>status</th><th>next check</th><th>message</th></tr></thead>
 						<tbody>
 						{{ $current := "" }}
-						{{ range . }}
+						{{ $mapping := .Mappings }}
+						{{ range .Checks }}
 						<tr>
 							<td><input type="checkbox" name="checks" value="{{ .CheckID }}" /></td>
 							<td>{{ if ne $current .NodeName }}{{ $current = .NodeName }}{{ .NodeName }}{{ end }}</td>
-							<td class="state-{{ .State }}">{{ .CommandName }} - {{ .State }}</td>
+							<td class="state-{{ .MappingId }}-{{ .State }}">{{ .CommandName }} - {{ (index $mapping .MappingId .State).Title }}</td>
 							<td>{{ .NextTime.Format "2006.01.02 15:04:05" }}</td>
 							<td><pre>{{ .Msg }}</pre></td>
 						</tr>

cmd/monwork/main.go

@@ -218,11 +218,13 @@ var (
 	where c.last_refresh < c.updated or c.last_refresh is null
   limit 1
 	for update of c skip locked;`
-	SQLRefreshActiveCheck = `insert into active_checks(check_id, cmdline, intval, enabled, notify, msg)
+	SQLRefreshActiveCheck = `insert into active_checks(check_id, cmdline, intval, enabled, notify, msg, mapping_id)
-select id, $2, c.intval, c.enabled, c.notify, case when ac.msg is null then '' else ac.msg end from checks c
+select c.id, $2, c.intval, c.enabled, c.notify, case when ac.msg is null then '' else ac.msg end, case when c.mapping_id is not null then c.mapping_id when n.mapping_id is not null then n.mapping_id else 1 end
+from checks c
 left join active_checks ac on c.id = ac.check_id
-where id = $1
+left join nodes n on c.node_id = n.id
+where c.id = $1
 on conflict(check_id)
-do update set cmdline = $2, intval = excluded.intval, enabled = excluded.enabled, notify = excluded.notify;`
+do update set cmdline = $2, intval = excluded.intval, enabled = excluded.enabled, notify = excluded.notify, mapping_id = excluded.mapping_id;`
 	SQLUpdateLastRefresh = `update checks set last_refresh = now() where id = $1;`
 )

schema/20181210.sql

@@ -1,3 +1,18 @@
+create table public.mappings(
+  id serial primary key,
+  name text not null,
+  description text not null
+);
+
+create table public.mapping_level(
+  mapping_id integer not null,
+  source int not null,
+  target int not null,
+  title text not null,
+  color text not null,
+  unique(mapping_id, source)
+);
+
 CREATE TABLE public.notifier (
     id serial NOT NULL primary key,
     name text NOT NULL
@@ -10,10 +25,11 @@ CREATE TABLE public.groups (
 
 CREATE TABLE public.nodes (
     id bigserial NOT NULL primary key,
+    mapping_id int references mappings(id),
     name text NOT NULL,
     updated timestamp with time zone DEFAULT now() NOT NULL,
     created timestamp with time zone DEFAULT now() NOT NULL,
-    message text NOT NULL
+    message text NOT NULL,
 );
 
 CREATE TABLE public.nodes_groups (
@@ -28,13 +44,14 @@ CREATE TABLE public.commands (
     command text NOT NULL,
     updated timestamp with time zone DEFAULT now() NOT NULL,
     created timestamp with time zone DEFAULT now() NOT NULL,
-    message text NOT NULL
+    message text NOT NULL,
 );
 
 CREATE TABLE public.checks (
     id bigserial NOT NULL primary key,
     node_id integer not null references nodes(id) on delete cascade,
     command_id integer not null references commands(id) on delete restrict,
+    mapping_id int references mappings(id),
     intval interval DEFAULT '00:05:00'::interval NOT NULL,
     options jsonb DEFAULT '{}'::jsonb NOT NULL,
     updated timestamp with time zone DEFAULT now() NOT NULL,
@@ -48,6 +65,7 @@ CREATE TABLE public.checks (
 
 CREATE TABLE public.active_checks (
     check_id bigint NOT NULL references checks(id) on delete cascade,
+    mapping_id int not null references mappings(id),
     cmdline text[] NOT NULL,
     next_time timestamp with time zone DEFAULT now() NOT NULL,
     states integer[] DEFAULT ARRAY[0] NOT NULL,