Add CCR stuff, fix search, add docs support, support index maps, refactor (#13)

pkg/es/ccr.go

@@ -0,0 +1,87 @@
+/*
+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"
+	"errors"
+	"fmt"
+	"log/slog"
+
+	"codeberg.org/scip/esctl/pkg/cfg"
+	"github.com/elastic/go-elasticsearch/v9/typedapi/types"
+)
+
+const (
+	shard_pause = `cluster.routing.allocation.enable`
+)
+
+func CcrShardPause(conf *cfg.Config) error {
+	return ClusterSettingsSetSingle(conf, shard_pause, "none")
+}
+
+func CcrShardResume(conf *cfg.Config) error {
+	return ClusterSettingsSetSingle(conf, shard_pause, "all")
+}
+
+func CcrStatus(conf *cfg.Config, leader, follower string) error {
+	if !checkClusterIsLeader(conf, leader) {
+		if !checkClusterIsLeader(conf, follower) {
+			return errors.New("leader/follower attribution is invalid, both clusters are followers")
+		}
+
+		// reverse attribution
+		f := follower
+		follower = leader
+		leader = f
+		slog.Debug("leader/follower attribution is invalid, reversing", "leader", leader, "follower", follower)
+	}
+
+	indices := ClusterIndices{}
+
+	for _, alias := range []string{leader, follower} {
+		cat := conf.Clusters[alias].ES.Cat.Indices().
+			// we need to add custom request headers, required for older ES instances
+			Header("content-type", "application/json").
+			Header("accept", "application/json")
+
+		res, err := cat.Do(context.Background())
+		if err != nil {
+			return fmt.Errorf("failed to get indicies on %s: %s", alias, err)
+		}
+
+		indices[alias] = make(map[string]*types.IndicesRecord, len(res))
+
+		for _, index := range res {
+			indices[alias][*index.Index] = &index
+		}
+	}
+
+	if !checkClusterStatus(conf, leader, follower) {
+		return errors.New("one of the two clusters is in a failed state")
+	}
+
+	findIlmErrors(conf, leader, follower)
+
+	if findIndicesOnlyOnLeader(conf, indices, leader, follower) &&
+		findOrphanedIndices(conf, indices, leader, follower) &&
+		findFailedFollowerIndices(conf, indices, follower) {
+		fmt.Println("everything's hunky-dory.")
+	}
+
+	return nil
+}