Minikube Ingress DNS: Difference between revisions
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kubectl get configmap coredns -n kube-system -o yaml\ | kubectl get configmap coredns -n kube-system -o yaml\ | ||
| sed -z "s|${CONFIGMAP_COREDNS_FIND}|$(echo "${CONFIGMAP_COREDNS_FILL}")|" | | sed -z "s|${CONFIGMAP_COREDNS_FIND}|$(echo "${CONFIGMAP_COREDNS_FILL}")|" | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 07:27, 3 July 2024
minikube stop
minikube delete --all
rm -rf ${HOME}/.minikube/*
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minikube start
minikube docker-env
minikube addons list
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minikube addons enable ingress
minikube addons enable ingress-dns
minikube addons enable metrics-server
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kubectl get ns
kubectl get all
kubectl get all -A
kubectl get pods -A
kubectl get namespaces
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minikube kubectl -- get ns
minikube kubectl -- get all
minikube kubectl -- get all -A
minikube kubectl -- get pods -A
minikube kubectl -- get namespaces
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kubectl get all -n kube-system
kubectl get configmap -n kube-system
kubectl get configmap coredns -n kube-system
kubectl edit configmap coredns -n kube-system
kubectl get configmap coredns -n kube-system -o yaml
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Ingress DNS
# minikube find coredns last entry
CONFIGMAP_COREDNS_FIND=$(cat <<QRY
}\n\
cache 30\n\
loop\n\
reload\n\
loadbalance\n\
}
QRY
)
# minikube nameserver ip
printf -v MINIKUBE_NSLOOKUP '%s' $(minikube ip)
# minikube fill coredns last entry
CONFIGMAP_COREDNS_FILL=$(cat <<UPD
${CONFIGMAP_COREDNS_FIND}\n\
k8s.local:53 {\n\
errors\n\
cache 30\n\
forward . ${MINIKUBE_NSLOOKUP}\n\
}
UPD
)
# minikube update coredns entry for k8s.local
kubectl get configmap coredns -n kube-system -o yaml \
| sed -z "s|${CONFIGMAP_COREDNS_FIND}|$(echo "${CONFIGMAP_COREDNS_FILL}")|" \
| kubectl apply -n kube-system -f -
| |
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K8s » Dashboard | |
cat << YML | kubectl apply -n kubernetes-dashboard -f -
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: kubernetes-dashboard
namespace: kubernetes-dashboard
labels:
app.kubernetes.io/version: 1.0.0
app.kubernetes.io/name: kubernetes-dashboard
app.kubernetes.io/instance: kubernetes-dashboard
app.kubernetes.io/managed-by: Chorke-Academia-Inc
spec:
ingressClassName: nginx
rules:
- host: "www.k8s.local"
http:
paths:
- path: /
pathType: ImplementationSpecific
backend:
service:
name: kubernetes-dashboard
port:
number: 80
YML
|
cat <<YML | kubectl delete -n kubernetes-dashboard -f -
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: kubernetes-dashboard
namespace: kubernetes-dashboard
labels:
app.kubernetes.io/version: 1.0.0
app.kubernetes.io/name: kubernetes-dashboard
app.kubernetes.io/instance: kubernetes-dashboard
app.kubernetes.io/managed-by: Chorke-Academia-Inc
spec:
ingressClassName: nginx
rules:
- host: "www.k8s.local"
http:
paths:
- path: /
pathType: ImplementationSpecific
backend:
service:
name: kubernetes-dashboard
port:
number: 80
YML
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kubectl run -i --tty --rm debug --image=alpine --restart=Never -- nslookup www.k8s.local
kubectl run -i --tty --rm debug --image=alpine --restart=Never -- ping www.k8s.local
nslookup www.k8s.local $(minikube ip)
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K8s » DNS Config | |
RESOLVE='/etc/resolv.conf';\
printf -v K8S_DNS '%s' $(minikube ip);\
if [ -f ${RESOLVE} ]&&[ "$(grep -c ${K8S_DNS} ${RESOLVE})" == 0 ];then\
cat << EOF | sudo tee -a ${RESOLVE} >/dev/null
nameserver ${K8S_DNS}
EOF
fi;\
cat ${RESOLVE}
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nslookup www.k8s.local
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ping www.k8s.local
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xdg-open http://www.k8s.local &>/dev/null &
gnome-open http://www.k8s.local &>/dev/null &
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x-www-browser http://www.k8s.local &>/dev/null &
sensible-browser http://www.k8s.local &>/dev/null &
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Dynamic DNS Script
cat << EXE | sudo tee /etc/network/if-{up,post-down}.d/minikube-ifupdown >/dev/null
#!/bin/bash
: '
@vendor Chorke Academia, Inc.
@web https://cdn.chorke.org/docs/academia
@version 1.0.00
@since 1.0.00
'
USER_TARGET="${USER}"
function silent_exit(){
exit 0
}
function verify_addr(){
printf -v DNS_HOST '%s' \$(sudo -u \${USER_TARGET} minikube ip)
if [[ "\${DNS_HOST}" =~ ^(([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))\.){3}([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))$ ]]; then
if [[ "\${DNS_HOST}" == '127.0.0.1' ]]; then silent_exit; fi
else silent_exit; fi
}
function verify_kube(){
printf -v K8S_JSON '%s' \$(sudo -u \${USER_TARGET} minikube status -o 'json')
printf -v K8S_REST '%s' \$(echo \${K8S_JSON} | jq -r '.APIServer')
printf -v K8S_KUBE '%s' \$(echo \${K8S_JSON} | jq -r '.Kubelet')
printf -v K8S_HOST '%s' \$(echo \${K8S_JSON} | jq -r '.Host')
if [[ "\${K8S_HOST}" == 'Running' ]]&&
[[ "\${K8S_KUBE}" == 'Running' ]]&&
[[ "\${K8S_REST}" == 'Running' ]]; then verify_addr
else silent_exit; fi
}
function verify_tool(){
if [[ -x "\$(command -v jq)" ]]; then verify_kube; else silent_exit; fi
}
function verify_mini(){
if [[ -x "\$(command -v minikube)" ]]; then verify_tool; else silent_exit; fi
}
function verify_link(){
HOST_ETHERS="\$(ip -j link show | jq -r '.[].ifname'| paste -sd' ' -)"
if [[ "\${HOST_ETHERS}" =~ "\${IFACE}" ]]; then verify_mini; else silent_exit; fi
}
function verify_mode(){
if [[ "\${MODE}" == 'start' ]]; then verify_link; else verify_mini; fi
}
function verify(){
verify_mode
}
function amend_nameserver(){
RESOLV_CONF='/etc/resolv.conf'
if [[ -f \${RESOLV_CONF} ]]&&[[ "\$(grep -c \${DNS_HOST} \${RESOLV_CONF})" == 0 ]];then
cat << CON | sudo tee -a \${RESOLV_CONF} >/dev/null
# minikube dns server
nameserver \${DNS_HOST}
CON
else silent_exit; fi
}
function handle(){
amend_nameserver
}
function init(){
verify
handle
}
init
EXE
sudo chmod +x /etc/network/if-{up,post-down}.d/minikube-ifupdown
Playground
minikube status -f '{{.Kubeconfig}}'
minikube status -f '{{.APIServer}}'
minikube status -f '{{.Kubelet}}'
minikube status -f '{{.Worker}}'
minikube status -f '{{.Host}}'
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minikube status -o 'json' | jq -r '.Kubeconfig'
minikube status -o 'json' | jq -r '.APIServer'
minikube status -o 'json' | jq -r '.Kubelet'
minikube status -o 'json' | jq -r '.Worker'
minikube status -o 'json' | jq -r '.Host'
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ip -j link show | jq -r '.[].ifname'| paste -sd' ' -
ip -j link show type bridge | jq -r '.[].ifname'
ip -o link show | awk -F': ' '{print $2}'
ip -j link show | jq -r '.[].ifname'
ls /sys/class/net
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minikube status -f '{{- if .TimeToStop }} timeToStop: {{.TimeToStop}} {{- end }}'
minikube status -f '{{- if .DockerEnv }} docker-env: {{.DockerEnv}} {{- end }}'
minikube status -o 'json' | jq
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ip -j link show | jq -r '.[]|select(.link_type=="loopback")'
ip -j link show | jq -r '.[]|select(.link_type=="ether")'
ip -j link show | jq -r '.[]|select(.link_type==null)'
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export SYSTEM_RAM_QUOTA=$((3*1024))
export SYSTEM_RAM_LIMIT=$(awk '/^MemTotal:/ {print int($2/1024-3*1024);}' /proc/meminfo)
export SYSTEM_RAM_LIMIT=$(awk -v QUOTA="${SYSTEM_RAM_QUOTA}" '/^MemTotal:/ {print int($2/1024-QUOTA);}' /proc/meminfo)
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bash <(curl -s 'https://cdn.chorke.org/exec/cli/bash/install/minikube/network/ifupdown/1.0.0-ubuntu-22.04.sh.txt')
sudo su -c 'export IFACE=lo;export MODE=stop; /etc/network/if-post-down.d/minikube-ifupdown'
sudo su -c 'export IFACE=lo;export MODE=start;/etc/network/if-up.d/minikube-ifupdown'
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echo 'export IFACE=lo;export MODE=stop; /etc/network/if-post-down.d/minikube-ifupdown'|sudo su
echo 'export IFACE=lo;export MODE=start;/etc/network/if-up.d/minikube-ifupdown'|sudo su
ls -lah /etc/network/if-{up,post-down}.d/minikube-ifupdown
sudo rm -f /etc/network/if-{up,post-down}.d/minikube-ifupdown
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bash <(curl -s 'https://cdn.chorke.org/exec/cli/bash/install/minikube/network/ifupdown/1.0.0-ubuntu-24.04.sh.txt')
sudo /etc/NetworkManager/dispatcher.d/minikube-ifupdown lo down
sudo /etc/NetworkManager/dispatcher.d/minikube-ifupdown lo up
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CONFIGMAP_COREDNS_FIND=$(cat <<QRY
}\n\
cache 30\n\
loop\n\
reload\n\
loadbalance\n\
}
QRY
)
|
CONFIGMAP_COREDNS_FILL=$(cat <<UPD
${CONFIGMAP_COREDNS_FIND}\n\
k8s.local:53 {\n\
errors\n\
cache 30\n\
forward . 192.168.49.2\n\
}
UPD
)
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kubectl get configmap coredns -n kube-system -o yaml\
| sed -z "s|${CONFIGMAP_COREDNS_FIND}|$(echo "${CONFIGMAP_COREDNS_FILL}")|"
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References
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