Linux
使用 bash 在公共鍵列上左外連接 2 shell 輸出
有沒有一種方法可以根據公共鍵列（IP 地址）對來自 2 個不同命令的 bash 輸出進行“左外連接”？由於各種原因，我想避免將任一命令的輸出保存到文件中，並將文件名用作 awk/join 的輸入。
這些是我想合併在一起的 2 個輸出：
output1=$(oc get pod -lname=elasticsearch -o wide) output2=$(curl -ks https://elasticsearch.apps.ocp.domain.com/_cat/allocation?v)這是我的 elasticsearch pod 的磁碟使用率
$ echo "$output1" shards disk.indices disk.used disk.avail disk.total disk.percent host ip node 347 1.5tb 1.5tb 4.2tb 5.8tb 27 10.1.1.1 10.1.1.1 jxAuPMt 335 1.7tb 1.7tb 4tb 5.8tb 30 10.2.2.2 10.2.2.2 bwYW1cg 341 1.3tb 1.9tb 959.7gb 2.9tb 67 10.3.3.3 10.3.3.3 69O4sR- 343 1.6tb 1.7tb 1.1tb 2.9tb 59 10.4.4.4 10.4.4.4 zCVUS05 346 1.4tb 1.9tb 1000.6gb 2.9tb 66 10.5.5.5 10.5.5.5 AlvtEtf 345 1.6tb 1.6tb 1.2tb 2.9tb 57 10.6.6.6 10.6.6.6 pmObkSm 248 1tb 1tb 374.9gb 1.4tb 74 10.7.7.7 10.7.7.7 OSzB5J1 332 1.4tb 1.9tb 952.1gb 2.9tb 68 10.8.8.8 10.8.8.8 EShhlrb 218 1011.8gb 1tb 418.2gb 1.4tb 71 10.9.9.9 10.9.9.9 1rQ7PXD 329 1.7tb 1.8tb 1tb 2.9tb 63 10.10.10.10 10.10.10.10 73TfUnn 15 UNASSIGNED這是我的環境中正在執行的 elasticsearch pod
$ echo "$output2" NAME READY STATUS RESTARTS AGE IP NODE elasticsearch-4-40700 1/1 Running 0 4d 10.1.1.1 server1b.ocp.domain.com elasticsearch-4-6m2p1 1/1 Running 0 4d 10.2.2.2 server2b.ocp.domain.com elasticsearch-4-8n8v5 1/1 Running 0 7d 10.3.3.3 server3b.ocp.domain.com elasticsearch-4-ffnk0 1/1 Running 0 4d 10.4.4.4 server4b.ocp.domain.com elasticsearch-4-h5xr6 1/1 Running 0 7d 10.5.5.5 server5b.ocp.domain.com elasticsearch-4-h6c15 1/1 Running 0 7d 10.6.6.6 server6b.ocp.domain.com elasticsearch-4-j7cv5 1/1 Running 0 7d 10.7.7.7 server7b.ocp.domain.com elasticsearch-4-nn3pc 1/1 Running 0 5d 10.8.8.8 server8b.ocp.domain.com elasticsearch-4-sq5hr 1/1 Running 0 7d 10.9.9.9 server9b.ocp.domain.com elasticsearch-4-zj7tq 1/1 Running 0 7d 10.10.10.10 server10b.ocp.domain.com elasticsearch-4-az9sp 1/1 Running 0 7d 10.10.10.11 server11b.ocp.domain.com elasticsearch-4-bi2c7 1/1 Running 0 7d 10.10.10.12 server12b.ocp.domain.com根據 IP 地址從 output1 和 output2 執行“左外連接”後的預期結果
NAME READY STATUS RESTARTS AGE IP NODE shards disk.indices disk.used disk.avail disk.total disk.percent node elasticsearch-4-40700 1/1 Running 0 4d 10.1.1.1 server1b.ocp.domain.com 347 1.5tb 1.5tb 4.2tb 5.8tb 27 jxAuPMt elasticsearch-4-6m2p1 1/1 Running 0 4d 10.2.2.2 server2b.ocp.domain.com 335 1.7tb 1.7tb 4tb 5.8tb 30 bwYW1cg elasticsearch-4-8n8v5 1/1 Running 0 7d 10.3.3.3 server3b.ocp.domain.com 341 1.3tb 1.9tb 959.7gb 2.9tb 67 69O4sR- elasticsearch-4-ffnk0 1/1 Running 0 4d 10.4.4.4 server4b.ocp.domain.com 343 1.6tb 1.7tb 1.1tb 2.9tb 59 zCVUS05 elasticsearch-4-h5xr6 1/1 Running 0 7d 10.5.5.5 server5b.ocp.domain.com 346 1.4tb 1.9tb 1000.6gb 2.9tb 66 AlvtEtf elasticsearch-4-h6c15 1/1 Running 0 7d 10.6.6.6 server6b.ocp.domain.com 345 1.6tb 1.6tb 1.2tb 2.9tb 57 pmObkSm elasticsearch-4-j7cv5 1/1 Running 0 7d 10.7.7.7 server7b.ocp.domain.com 248 1tb 1tb 374.9gb 1.4tb 74 OSzB5J1 elasticsearch-4-nn3pc 1/1 Running 0 5d 10.8.8.8 server8b.ocp.domain.com 332 1.4tb 1.9tb 952.1gb 2.9tb 68 EShhlrb elasticsearch-4-sq5hr 1/1 Running 0 7d 10.9.9.9 server9b.ocp.domain.com 218 1011.8gb 1tb 418.2gb 1.4tb 71 1rQ7PXD elasticsearch-4-zj7tq 1/1 Running 0 7d 10.10.10.10 server10b.ocp.domain.com 329 1.7tb 1.8tb 1tb 2.9tb 63 73TfUnn elasticsearch-4-az9sp 1/1 Running 0 7d 10.10.10.11 server11b.ocp.domain.com elasticsearch-4-bi2c7 1/1 Running 0 7d 10.10.10.12 server12b.ocp.domain.com
下面產生您想要的輸出，但沒有標題：
awk 'NR==FNR{a[$8]=$0}FILENAME==ARGV[1]{b[$6]=$2} FILENAME==ARGV[2]{print $0,a[$6]}' <(oc get pod -lname=elasticsearch -o wide) <(curl -ks https://elasticsearch.apps.ocp.domain.com/_cat/allocation?v) | awk 'NR>1' | awk '!($14=$15="")'有點不干淨的部分是如何刪除重複的 ip 地址列
'awk '!($14=$15="")''您可能最好使用一點多行腳本而不是單行來使此過程更清晰。