Question

我正在尝试编写一个shell脚本，该脚本将通过以下输出检查备份是否成功，以通过邮件发送警报：

Server standby:
    PostgreSQL: OK
    is_superuser: OK
    PostgreSQL streaming: OK
    wal_level: Failed
    replication slot: OK
    directories: OK
    retention policy settings: OK
    backup maximum age: OK (no last_backup_maximum_age provided)
    compression settings: OK
    failed backups: OK (there are 0 failed backups)
    minimum redundancy requirements: OK (have 96 backups, expected at least 0)
    ssh: OK (PostgreSQL server)
    pg_receivexlog: OK
    pg_receivexlog compatible: OK
    receive-wal running: OK
    archiver errors: OK

以下是完成工作的简单shell脚本：

#!/bin/bash

OUT="Server standby:
    PostgreSQL: OK
    is_superuser: OK
    PostgreSQL streaming: Failed
    wal_level: OK
    replication slot: OK
    directories: OK
    retention policy settings: OK
    backup maximum age: OK (no last_backup_maximum_age provided)
    compression settings: OK
    failed backups: OK (there are 0 failed backups)
    minimum redundancy requirements: OK (have 96 backups, expected at least 0)
    ssh: OK (PostgreSQL server)
    pg_receivexlog: OK
    pg_receivexlog compatible: OK
    receive-wal running: OK
    archiver errors: OK"

if [ "`echo "$OUT" | sed -n '1!p' | grep -v 'OK'`" = "" ]
then
        echo "Backup successful & nothing failed"
        else
        echo "$OUT" | sed -n '1!p' | grep -v 'OK'
    fi

输出： ./check2.sh PostgreSQL流媒体：失败

有没有更好的方法来检查使用迭代或数组？我试过这样的事情：

#!/bin/bash

OUT="Server standby:
    PostgreSQL: OK
    is_superuser: OK
    PostgreSQL streaming: Failed
    wal_level: OK
    replication slot: OK
    directories: OK
    retention policy settings: OK
    backup maximum age: OK (no last_backup_maximum_age provided)
    compression settings: OK
    failed backups: OK (there are 0 failed backups)
    minimum redundancy requirements: OK (have 96 backups, expected at least 0)
    ssh: OK (PostgreSQL server)
    pg_receivexlog: OK
    pg_receivexlog compatible: OK
    receive-wal running: OK
    archiver errors: OK"

#FAIL=$(echo "$OUT" | sed 's/:.*//' | sed -n '1!p')

for status in $(echo "$OUT" | cut -d ":" -f 2 | sed -n '1!p' | awk '{print $1}' )
do
        if [ "$status" = 'OK' ]
        then
        echo "$status"
        else
                echo "$FAIL "-" $status"
        fi
done

Answer 1

egrep -v '^Server standby:$|: OK|^$' <<<"$OUT"

...只返回一行：

    wal_level: Failed

因此，这可以很简单：

failures=$(grep -E -v '^Server standby:$|: OK|^$' <<<"$OUT")

if [[ $failures ]]; then
  printf '%s\n' "$failures"
else
  echo "Backup successful and nothing failed"
fi

也就是说，如果你想将输出的每一行添加到一个数组中（例如，通过检查数组长度来计算它们），这很容易做到：

mapfile -t failures < <(grep -E -v '^Server standby:$|: OK|^$' <<<"$OUT")

if (( ${#failures[@]} == 0 )); then
  echo "No failures"
else
  echo "Failures seen:"
  printf ' - %s\n' "${failures[@]}"
fi

......我很难说这个更简单。

Shell脚本，用于检查返回的命令输出中的状态是否正常

1 个答案: