从 /usr/local/var 卸载 elasticsearch 并在 MacOSX 上安装另一个版本

Question

我试图在我的 Mac 机器上将 elasticsearch 从 6.8.4 降级到 5.6。但不知何故，我弄乱了 6.8.4 的现有安装，现在我既无法修复当前安装的版本，也无法安装 5.6

详情：

我在我的系统上正确安装了 6.8.4，我成功地访问了 http://localhost:9200/ 端口并查看了版本信息和所有其他详细信息。但是由于依赖，我不得不将版本降级到 5.6

我遵循了本指南 https://gist.github.com/govindpatel/0660b33a343b807664972b53c3b12ca0 并通过删除 plist 条目和其他详细信息搞乱了 6.8.4 的安装。现在，当我尝试通过键入 $ elasticsearch 来启动 elasticsearch 服务时，我得到：-bash: elasticsearch: command not found 和 $ brew service restart elasticsearch 给我 Error: Unknown command: service

但是，当我执行此命令时，我仍然可以看到 6.8.4:

$ brew info elasticsearch
elasticsearch: stable 6.8.4, HEAD
Distributed search & analytics engine
https://www.elastic.co/products/elasticsearch
Not installed
From: https://github.com/Homebrew/homebrew-core/blob/master/Formula/elasticsearch.rb
==> Requirements
  Required: java = 1.8 ✔
==> Options
  --HEAD
  Install HEAD version
==> Caveats
  Data:    /usr/local/var/lib/elasticsearch/
  Logs:    /usr/local/var/log/elasticsearch/elasticsearch_Puneet.log
  Plugins: /usr/local/var/elasticsearch/plugins/
  Config:  /usr/local/etc/elasticsearch/


To have launchd start elasticsearch now and restart at login:
  brew services start elasticsearch
Or, if you don't want/need a background service you can just run:
  elasticsearch
==> Analytics
  install: 8,690 (30 days), 23,748 (90 days), 122,267 (365 days)
  install_on_request: 8,233 (30 days), 22,565 (90 days), 114,157 (365 days)
  build_error: 0 (30 days)

我什至尝试安装 5.6（通过 Homebrew）- brew install elasticsearch@5.6 并将 PATH 设置在 ~/.bash_profile 的第一位，但没有成功！ :(

请在以下方面提供帮助和建议：

如何修复现有的 6.8.4 版本，并且
我如何系统地降级它（因为现有的conf，数据位于/usr/local文件夹下）

当前详细信息：查看 elasticsearch 是否运行：$ launchctl list | grep elasticsearch，我得到：- 1 homebrew.mxcl.elasticsearch@5.6，我目前没有安装它（o/p 附件） - $ brew uninstall elasticsearch@5.6 ~> Error: No such keg: /usr/local/Cellar/elasticsearch@5.6

[UPDATE-1]

发布后，我再次尝试运行 ES 安装命令：brew install elasticsearch

Updating Homebrew...
==> Auto-updated Homebrew!
  Updated 2 taps (homebrew/core and homebrew/cask).
  No changes to formulae.

==> Downloading 
  https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-oss-6.8.4.tar.gz
Already downloaded: /Library/Caches/Homebrew/downloads/elasticsearch-oss-6.8.4.tar.gz
==> Caveats
  Data:    /usr/local/var/lib/elasticsearch/
  Logs:    /usr/local/var/log/elasticsearch/elasticsearch_Puneet.log
  Plugins: /usr/local/var/elasticsearch/plugins/
  Config:  /usr/local/etc/elasticsearch/

To have launchd start elasticsearch now and restart at login:
  brew services start elasticsearch
Or, if you don't want/need a background service you can just run:
  elasticsearch
==> Summary
      /usr/local/Cellar/elasticsearch/6.8.4: 133 files, 103.2MB, built in 6 seconds

然后启动服务 $ brew services start elasticsearch ~> ==> Successfully startedelasticsearch(label: homebrew.mxcl.elasticsearch)。现在，当我尝试访问端口时：http://localhost:9200——它正在工作（虽然从 0 安装修复了这个问题！）

{
  "name" : "DwQRyf7",
  "cluster_name" : "elasticsearch_Puneet",
  "cluster_uuid" : "hLAu9onQSiuQHOpm_e9IKw",
  "version" : {
    "number" : "6.8.4",
    "build_flavor" : "oss",
    "build_type" : "tar",
    "build_hash" : "bca0c8d",
    "build_date" : "2019-10-16T06:19:49.319352Z",
    "build_snapshot" : false,
    "lucene_version" : "7.7.2",
    "minimum_wire_compatibility_version" : "5.6.0",
    "minimum_index_compatibility_version" : "5.0.0"
  },
  "tagline" : "You Know, for Search"
}

现在唯一的问题是，如何系统降级？

[UPDATE-2]

现在我有 6.8.4，我检查了其他版本：brew search elasticsearch 并得到了 5.6。然后我用 brew install elasticsearch@5.6

安装了 5.6

Updating Homebrew...
==> Auto-updated Homebrew!
  Updated 1 tap (homebrew/cask).
  No changes to formulae.
==> Downloading https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.6.16.tar.gz
  Already downloaded: /Library/Caches/Homebrew/downloads/3d7cc028f605699065bd403b0a2383db8d7413c570df57e26fc87a735126c96c--elasticsearch-5.6.16.tar.gz
==> Caveats
  Data:    /usr/local/var/elasticsearch/elasticsearch_Puneet/
  Logs:    /usr/local/var/log/elasticsearch/elasticsearch_Puneet.log
  Plugins: /usr/local/opt/elasticsearch@5.6/libexec/plugins/
  Config:  /usr/local/etc/elasticsearch/
  plugin script: /usr/local/opt/elasticsearch@5.6/libexec/bin/elasticsearch-plugin

elasticsearch@5.6 is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.

If you need to have elasticsearch@5.6 first in your PATH run:
  echo 'export PATH="/usr/local/opt/elasticsearch@5.6/bin:$PATH"' >> ~/.bash_profile


To have launchd start elasticsearch@5.6 now and restart at login:
  brew services start elasticsearch@5.6
Or, if you don't want/need a background service you can just run:
  /usr/local/opt/elasticsearch@5.6/bin/elasticsearch
==> Summary
    /usr/local/Cellar/elasticsearch@5.6/5.6.16: 106 files, 36.0MB, built in 6 seconds

然后我在 $PATH 上加了 5.6。现在，当我尝试使用 brew switch elasticsearch 5.6 切换 elasticsearch 版本时，我得到：

Error: elasticsearch does not have a version "5.6" in the Cellar.
elasticsearch installed versions: 6.8.4

知道我在这里遗漏了什么吗？

Answer 1

看来我在排查了一段时间后找到了解决方案。

为了在您的开发中维护多个版本的 elasticsearch machine，这是您需要做的：

假设我安装了 6.8.4，我还想要另一个版本。为了维护两者，首先检查你的系统（mac）有哪些版本，输入：brew search elasticsearch，我的系统有 3 个版本支持 ES：

elasticsearch - 最新且稳定（已安装）
elasticsearch@2.4
elasticsearch@5.6

要获得 2.4，您需要执行以下操作：

$ brew install elasticsearch@2.4
# After installation type:
$ brew services stop elasticsearch
# above command will stop elasticsearch (lastest stable) service
# add 2.4 to $PATH
$ echo 'export PATH="/usr/local/opt/elasticsearch@2.4/bin:$PATH"' >> ~/.bash_profile
# start the service of 2.4
$ brew services start elasticsearch@2.4
# check for the service/installation
$ launchctl list | grep elasticsearch
# above command should show you a port

现在您可以在浏览器中点击 http://localhost:9200，它应该会显示 2.4

要切换回最新的稳定版本：

$ brew services stop elasticsearch
# remove entry from $PATH variable
$ brew services start elasticsearch

我觉得brew switch elasticsearch [VERSION]不行

从 /usr/local/var 卸载 elasticsearch 并在 MacOSX 上安装另一个版本

Uninstall elasticsearch from /usr/local/var and install another version on MacOSX

elasticsearch

elasticsearch-rails