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Copy pathcis-3.8.1-vpc-flow-logs.sh
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cis-3.8.1-vpc-flow-logs.sh
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#!/bin/bash
source functions.inc
declare PROJECT_IDS="";
declare DEBUG="False";
declare CSV="False";
declare ICH="False";
declare HELP=$(cat << EOL
$0 [-p, --project PROJECT] [-c, --csv] [-i, --include-column-headers] [-d, --debug] [-h, --help]
EOL
);
for arg in "$@"; do
shift
case "$arg" in
"--help") set -- "$@" "-h" ;;
"--debug") set -- "$@" "-d" ;;
"--csv") set -- "$@" "-c" ;;
"--include-column-headers") set -- "$@" "-i" ;;
"--project") set -- "$@" "-p" ;;
*) set -- "$@" "$arg"
esac
done
while getopts "hdcip:r:" option
do
case "${option}"
in
p)
PROJECT_IDS=${OPTARG};;
d)
DEBUG="True";;
c)
CSV="True";;
i)
ICH="True";;
h)
echo $HELP;
exit 0;;
esac;
done;
if [[ $PROJECT_IDS == "" ]]; then
declare PROJECT_IDS=$(gcloud projects list --format="flattened(PROJECT_ID)" | grep project_id | cut -d " " -f 2);
fi;
if [[ $ICH == "True" ]]; then
echo "\"PROJECT_ID\", \"PROJECT_NAME\", \"PROJECT_OWNER\", \"PROJECT_APPLICATION\", \"SUBNET_NAME\", \"IP_RANGE\", \"FLOW_LOGS_ENABLED\", \"FLOW_LOG_AGGREGATION_INTERVAL\", \"FLOW_LOG_SAMPLE_RATE\", \"FLOW_LOG_METADATA_CONFIGURATION\", \"FLOW_LOGS_ENABLED\", \"FLOW_LOG_STATUS_MESSAGE\", \"FLOW_LOG_SAMPLE_RATE_STATUS_MESSAGE\"";
fi;
for PROJECT_ID in $PROJECT_IDS; do
if ! api_enabled compute.googleapis.com; then
echo "Compute Engine API is not enabled on Project $PROJECT_ID"
continue
fi
gcloud config set project $PROJECT_ID 2>/dev/null;
declare SUBNETS=$(gcloud compute networks subnets list --format json);
if [[ $CSV != "True" ]]; then
echo "---------------------------------------------------------------------------------";
echo "Subnets for Project $PROJECT_ID";
echo "---------------------------------------------------------------------------------";
fi;
if [[ $SUBNETS != "[]" ]]; then
PROJECT_DETAILS=$(gcloud projects describe $PROJECT_ID --format="json");
PROJECT_NAME=$(echo $PROJECT_DETAILS | jq -rc '.name');
PROJECT_APPLICATION=$(echo $PROJECT_DETAILS | jq -rc '.labels.app');
PROJECT_OWNER=$(echo $PROJECT_DETAILS | jq -rc '.labels.adid');
echo $SUBNETS | jq -rc '.[]' | while IFS='' read -r SUBNET;do
SUBNET_NAME=$(echo $SUBNET | jq -rc '.name');
IP_RANGE=$(echo $SUBNET | jq -rc '.ipCidrRange');
FLOW_LOGS_CONFIGURED=$(echo $SUBNET | jq -rc '.logConfig // ""');
if [[ $FLOW_LOGS_CONFIGURED != "" ]]; then
FLOW_LOGS_ENABLED=$(echo $SUBNET | jq -rc '.enableFlowLogs');
FLOW_LOG_AGGREGATION_INTERVAL=$(echo $SUBNET | jq -rc '.logConfig.aggregationInterval');
FLOW_LOG_SAMPLE_RATE=$(echo $SUBNET | jq -rc '.logConfig.flowSampling');
FLOW_LOG_METADATA_CONFIGURATION=$(echo $SUBNET | jq -rc '.logConfig.metadata');
# Returns 0 for FALSE and 1 for TRUE
FLOW_LOG_SAMPLE_RATE_TOO_LOW=$(echo "$FLOW_LOG_SAMPLE_RATE < 0.10" | bc);
if [[ $FLOW_LOGS_ENABLED == "false" ]]; then
FLOW_LOG_STATUS_MESSAGE="VIOLATION: Flow logging is configured but not enabled";
else
FLOW_LOG_STATUS_MESSAGE="PASS: Flow log enabled";
fi;
if [[ $FLOW_LOG_SAMPLE_RATE_TOO_LOW == 1 ]]; then
FLOW_LOG_SAMPLE_RATE_STATUS_MESSAGE="VIOLATION: Flow log sample rate is too low";
else
FLOW_LOG_SAMPLE_RATE_STATUS_MESSAGE="PASS: Flow log sample rate is at least 10%";
fi;
else # $FLOW_LOGS_CONFIGURED is NULL
FLOW_LOGS_ENABLED="false";
FLOW_LOG_AGGREGATION_INTERVAL="0";
FLOW_LOG_SAMPLE_RATE="0";
FLOW_LOG_METADATA_CONFIGURATION="false";
FLOW_LOG_STATUS_MESSAGE="VIOLATION: Flow logging is configured but not enabled";
FLOW_LOG_SAMPLE_RATE_STATUS_MESSAGE="VIOLATION: Flow log sample rate is too low";
fi;
# Print the results gathered above
if [[ $CSV != "True" ]]; then
echo "Project Name: $PROJECT_NAME";
echo "Project Application: $PROJECT_APPLICATION";
echo "Project Owner: $PROJECT_OWNER";
echo "Subnet: $SUBNET_NAME";
echo "IP Range: $IP_RANGE";
echo "Flow Log Enabled: $FLOW_LOGS_ENABLED";
echo "Flow Log Aggregation Interval: $FLOW_LOG_AGGREGATION_INTERVAL";
echo "Flow Log Sample Rate: $FLOW_LOG_SAMPLE_RATE";
echo "Flow Log Metadata Configuration: $FLOW_LOG_METADATA_CONFIGURATION";
echo $FLOW_LOG_STATUS_MESSAGE;
echo $FLOW_LOG_SAMPLE_RATE_STATUS_MESSAGE;
echo "";
else
echo "\"$PROJECT_ID\", \"$PROJECT_NAME\", \"$PROJECT_OWNER\", \"$PROJECT_APPLICATION\", \"$SUBNET_NAME\", \"$IP_RANGE\", \"$FLOW_LOGS_ENABLED\", \"$FLOW_LOG_AGGREGATION_INTERVAL\", \"$FLOW_LOG_SAMPLE_RATE\", \"$FLOW_LOG_METADATA_CONFIGURATION\", \"$FLOW_LOGS_ENABLED\", \"$FLOW_LOG_STATUS_MESSAGE\", \"$FLOW_LOG_SAMPLE_RATE_STATUS_MESSAGE\"";
fi;
done;
else
if [[ $CSV != "True" ]]; then
echo "No subnets found for project $PROJECT_ID";
echo "";
fi;
fi;
sleep 0.5;
done;