chown -R 1000:1000 /data/es/data-b/
chmod -R 777 /data/es/data-b/

最近想弄一個docker 環境，docker-composer 內容為 nginx,php,mysql,redis,elasticsearch.

但是在安裝es的時候出錯了，在網上找了幾天原因也沒找到，問題為：只要做持久化就會報錯，報錯內容如下

java.lang.IllegalStateException: failed to obtain node locks, tried [/usr/share/elasticsearch/data]; maybe these locations are not writable or multiple nodes were started on the same data path?

原來是 es映象的使用者是1000，所以在宿主機給改使用者賦權

chown -R 1000:1000 /data/es/data-b/
chmod -R 777 /data/es/data-b/

oK,這下不報這個錯了，但是又報記憶體不足的錯誤

max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

解決方案：

在/etc/sysctl.conf檔案最後新增一行

vm.max_map_count=262144

執行/sbin/sysctl -p 立即生效

然後再啟動試試！！！！

注意，es8.0以上啟動的時候會預設開始使用者認證，用普通方式無法訪問！

一般都在啟動的時候會顯示密碼，但是docker的話就不知道怎麼看密碼了 - -

所以我只能把es的配置檔案映射出來，修改配置檔案如下

 1 cluster.name: "docker-cluster"
 2 network.host: 0.0.0.0
 3 
 4 #----------------------- BEGIN SECURITY AUTO CONFIGURATION -----------------------
 5 #
 6 # The following settings, TLS certificates, and keys have been automatically      
 
 7 # generated to configure Elasticsearch security features on 15-03-2022 03:00:53
 8 #
 9 # --------------------------------------------------------------------------------
10 
11 # Enable security features
12 # 這裡兩個設定成false
13 xpack.security.enabled: false
14 
15 xpack.security.enrollment.enabled: false
16 
17 
18 # Enable encryption for HTTP API client connections, such as Kibana, Logstash, and Agents
19 xpack.security.http.ssl:
20 enabled: true
21 keystore.path: certs/http.p12
22 
23 # Enable encryption and mutual authentication between cluster nodes
24 xpack.security.transport.ssl:
25 enabled: true
26 verification_mode: certificate
27 keystore.path: certs/transport.p12
28 truststore.path: certs/transport.p12
29 # Create a new cluster with the current node only
30 # Additional nodes can still join the cluster later
31 # 刪除或註釋這裡的 cluster.initial_master_nodes: ["docker容器ID"]
32 
33 #----------------------- END SECURITY AUTO CONFIGURATION -------------------------                                                                

到此可以訪問成功了！