最終版本

#!/bin/bash

date=$(date +"%Y_%m_%d_%H_%M")
api_key=$YOUR_API_KEY
label=$YOUR_VPS_LABEL
description=$label"_"$date
max_snapshots=3
sub_id=$(curl -H "API-Key: $api_key" https://api.vultr.com/v1/server/list | jq '.[] | select(.label=="'$label'") | .SUBID' -r)
snapshots=`curl -H "API-Key: $api_key" https://api.vultr.com/v1/snapshot/list | jq '[.[] | select(.description | contains("'$label'")) | .SNAPSHOTID ]'`

if ((`echo $snapshots | jq length` > 2)); then
        snapshot_id=`echo $snapshots | jq '.[2]' -r`
        curl -H "API-Key: $api_key" https://api.vultr.com/v1/snapshot/destroy --data "SNAPSHOTID=$snapshot_id"
fi

curl -H "API-Key: $api_key" https://api.vultr.com/v1/snapshot/create --data "SUBID=$sub_id&description=$description"

分段解析

date=$(date +"%Y_%m_%d_%H_%M")
api_key=$YOUR_API_KEY
label=$YOUR_VPS_LABEL
description=$label"_"$date
max_snapshots=3
  • description 改成 label + 時間戳
  • max_snapshots: 最多只保留三個備份
sub_id=$(curl -H "API-Key: $api_key" https://api.vultr.com/v1/server/list | jq '.[] | select(.label=="'$label'") | .SUBID' -r)

透過 label 取回要備份的 VPS ID。

snapshots=`curl -H "API-Key: $api_key" https://api.vultr.com/v1/snapshot/list | jq '[.[] | select(.description | contains("'$label'")) | .SNAPSHOTID ]'`
  • | select(.description | contains("'$label'"))

從清單中篩選出 description 包含有 $label 的 snapshot。

  • | .SNAPSHOTID

只留下 SNAPSHOTID 欄位。

  • '[   .....   ]'

最外層的 [] 是用來產生新陣列(e.g. [ "1715d7a02f2a6", "e865d793622dc", "aae5d788d62a1" ])，方便後續處理。

Reference