Ensure server parameter 'log_disconnections' is set to 'ON' for PostgreSQL Database Server

보통레벨 1자동alibaba

설명

Enable log_disconnections on PostgreSQL Servers. Enabling log_disconnections helps PostgreSQL Database to log session terminations of the server, as well as duration of the session. Log data can be used to identify, troubleshoot, and repair configuration errors and ... For every PostgreSQL instance the running parameter log_disconnections must be on. Iterates every RDS region and instance (DescribeDBInstances). Read-only aliyun CLI calls; credentials and default region come from the CLI's normal profile (aliyun configure, ~/.aliyun/config.json or ALIBABA_CLOUD_* environment variables). JSON output is parsed with sed/awk. A missing CLI or credential fails the check.

점검 방법

감사 방식: 셸 명령

shell

regs=$(aliyun rds DescribeRegions 2>/dev/null) || exit 1
regions=$(printf '%s\n' "$regs" | sed -n 's/.*"RegionId"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p' | sort -u)
[ -n "$regions" ] || exit 1
bad=0
for r in $regions; do
  page=1
  while :; do
    out=$(aliyun rds DescribeDBInstances --RegionId "$r" --Engine PostgreSQL --PageSize 100 --PageNumber "$page" 2>/dev/null) || exit 1
    ids=$(printf '%s\n' "$out" | sed -n 's/.*"DBInstanceId"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p' | sort -u)
    [ -n "$ids" ] || break
    for i in $ids; do
      p=$(aliyun rds DescribeParameters --DBInstanceId "$i" 2>/dev/null) || exit 1
      v=$(printf '%s\n' "$p" | awk '
/\{/ { nm = ""; vl = "" }
/"ParameterName"/ { nm = $0; sub(/^[^:]*:[[:space:]]*"/, "", nm); sub(/".*/, "", nm) }
/"ParameterValue"/ { vl = $0; sub(/^[^:]*:[[:space:]]*"/, "", vl); sub(/".*/, "", vl) }
/\}/ { if (nm == "log_disconnections") { print tolower(vl); exit } }')
      [ "$v" = on ] || { echo "log_disconnections=${v:-unset}: $r $i"; bad=1; }
    done
    set -- $ids
    [ "$#" -lt 100 ] && break
    page=$((page + 1))
  done
done
[ "$bad" -eq 0 ] && echo compliant

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

aliyun rds ModifyParameter --DBInstanceId <id> --Parameters '{"log_disconnections":"on"}' (RDS console > Parameters), then confirm the running value.

속성

운영 체제: 모두
태그: alibabards
참고 자료: CIS Alibaba Cloud Foundation Benchmark v2.0.1 - 6.8 Ensure server parameter 'log_disconnections' is set to 'ON' for PostgreSQL Database Server

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