66 lines
2.5 KiB
YAML
66 lines
2.5 KiB
YAML
# Author: Qasim Sarfraz
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# Trace DNS requests for containers, pods, and nodes
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# Requires kubectl version 1.30 or later
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# https://github.com/inspektor-gadget/inspektor-gadget
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# https://www.inspektor-gadget.io/docs/latest/gadgets/trace_dns
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plugins:
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trace-dns:
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shortCut: Shift-D
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description: Trace DNS requests
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scopes:
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- containers
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- pods
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- nodes
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command: bash
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confirm: false
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background: false
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args:
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- -c
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- |
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IG_VERSION=v0.34.0
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IG_IMAGE=ghcr.io/inspektor-gadget/ig:$IG_VERSION
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IG_FIELD=k8s.podName,src,dst,qr,qtype,name,rcode,latency_ns
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GREEN='\033[0;32m'
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RED='\033[0;31m'
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BLUE='\033[0;34m'
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NC='\033[0m' # No Color
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# Ensure kubectl version is 1.30 or later
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KUBECTL_VERSION=$(kubectl version --client | awk '/Client Version:/{print $3}')
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if [[ "$(echo "$KUBECTL_VERSION" | cut -d. -f2)" -lt 30 ]]; then
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echo -e "${RED}kubectl version 1.30 or later is required${NC}"
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sleep 3
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exit
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fi
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clear
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# Handle containers
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if [[ -n "$POD" ]]; then
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echo -e "${GREEN}Tracing DNS requests for container ${BLUE}${NAME}${GREEN} in pod ${BLUE}${POD}${GREEN} in namespace ${BLUE}${NAMESPACE}${NC}"
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IG_NODE=$(kubectl get pod "$POD" -n "$NAMESPACE" -o jsonpath='{.spec.nodeName}')
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kubectl debug --kubeconfig=$KUBECONFIG --context=$CONTEXT -q \
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--profile=sysadmin "node/$IG_NODE" -it --image="$IG_IMAGE" -- \
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ig run trace_dns:$IG_VERSION -F "k8s.podName==$POD" -F "k8s.containerName=$NAME" \
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--fields "$IG_FIELD"
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exit
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fi
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# Handle pods
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if [[ -n "$NAMESPACE" ]]; then
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echo -e "${GREEN}Tracing DNS requests for pod ${BLUE}${NAME}${GREEN} in namespace ${BLUE}${NAMESPACE}${NC}"
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IG_NODE=$(kubectl get pod "$NAME" -n "$NAMESPACE" -o jsonpath='{.spec.nodeName}')
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kubectl debug --kubeconfig=$KUBECONFIG --context=$CONTEXT -q \
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--profile=sysadmin -it --image="$IG_IMAGE" "node/$IG_NODE" -- \
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ig run trace_dns:$IG_VERSION -F "k8s.podName==$NAME" \
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--fields "$IG_FIELD"
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exit
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fi
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# Handle nodes
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echo -e "${GREEN}Tracing DNS requests for node ${BLUE}${NAME}${NC}"
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kubectl debug --kubeconfig=$KUBECONFIG --context=$CONTEXT -q \
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--profile=sysadmin -it --image="$IG_IMAGE" "node/$NAME" -- \
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ig run trace_dns:$IG_VERSION --fields "$IG_FIELD"
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