Add nodes and cluster settings support (#9)

pkg/es/node.go

@@ -0,0 +1,55 @@
+/*
+Copyright © 2026 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+package es
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+
+	"codeberg.org/scip/esctl/pkg/cfg"
+)
+
+func NodeList(conf *cfg.Config) error {
+	// get nodes
+	nodes, err := conf.DefaultCluster.ES.Cat.Nodes().Do(context.Background())
+	if err != nil {
+		return fmt.Errorf("Error getting nodes: %s", err)
+	}
+
+	slog.Debug("ES result", "nodes", nodes)
+
+	table := NewTable(7, len(nodes))
+	table.Addheaders("name", "ip", "load1m", "load5m", "load15m", "ram %", "heap %")
+
+	for idx, node := range nodes {
+		table.entries[idx] = []string{
+			*node.Name,
+			*node.Ip,
+			*node.Load1M,
+			*node.Load5M,
+			*node.Load15M,
+			node.RamPercent.(string),
+			node.HeapPercent.(string),
+		}
+	}
+
+	table.Sort()
+	table.PrintMarkdown()
+
+	return nil
+}