# Changing the IP in my Kubernetes cluster from 10.32.0.0/12 to 172.31.0.0/18 **URL:** \ **Category:** General Discussions\ **Created:** [June 17, 2020, 3:50pm UTC](https://discuss.kubernetes.io/t/changing-the-ip-in-my-kubernetes-cluster-from-10-32-0-0-12-to-172-31-0-0-18/11478 "2020-06-17T15:50:04Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Touseefyousuf](https://avatars.discourse-cdn.com/v4/letter/t/bb73d2/32.png) [@Touseefyousuf](https://discuss.kubernetes.io/u/Touseefyousuf)\ **Post date:** [June 17, 2020, 3:50pm UTC](https://discuss.kubernetes.io/t/changing-the-ip-in-my-kubernetes-cluster-from-10-32-0-0-12-to-172-31-0-0-18/11478/1 "2020-06-17T15:50:04Z")
Asking for help? Comment out what you need so we can get more information to help you! ### Cluster information: Kubernetes version: Cloud being used: (put bare-metal if not on a public cloud) bare metal Installation method: kubeadm Host OS: Ubuntu 18.04.3 LTS CNI and version: weave CRI and version: Hi, I am trying to change the cidr for my kubernetes cluster which is using a weave cni plugin using cidr /18 **curl -fsSLo weave-172subnet-daemonset.yaml "[https://cloud.weave.works/k8s/net?k8s-version=$](https://cloud.weave.works/k8s/net?k8s-version=%24)(kubectl version | base64 | tr -d ‘\n’)&env.IPALLOC\_RANGE=172.31.0.0/18"** Weave is installed and pods are up and running The problem i am facing is when i deploy a jenkins as container it still doesnot point to new cidr ```auto Name: jenkins-deployment-6c7d7949f4-97vmx Namespace: default Priority: 0 Node: k8s-jenkins-slave/10.41.80.43 Start Time: Wed, 17 Jun 2020 08:43:11 +0000 Labels: app=jenkins pod-template-hash=6c7d7949f4 Status: Running IP: 10.244.1.2 IPs: IP: **10.244.1.2** Controlled By: ReplicaSet/jenkins-deployment-6c7d7949f4 Containers: jenkins: Container ID: docker://30438bbb9af92c319d084ad7216d39db5329332d70ecbfc66cbfc1a80d150e20 Image: jenkins/jenkins:2.222.3 Image ID: docker-pullable://jenkins/jenkins@sha256:15fca69266f4cc2107449d9fa2595acf0cbe1584eb425ee6f2fe9cefc9fc4b97 Ports: 8080/TCP, 50000/TCP Host Ports: 0/TCP, 0/TCP State: Running ``` ```auto when i describe the core dns output is like this: Name: coredns-66bff467f8-vfkcc Namespace: kube-system Priority: 2000000000 Priority Class Name: system-cluster-critical Node: k8s-jenkins-master/10.41.80.44 Start Time: Wed, 17 Jun 2020 07:50:54 +0000 Labels: k8s-app=kube-dns pod-template-hash=66bff467f8 Annotations: Status: Running IP: **10.244.0.3** IPs: IP: **10.244.0.3** Controlled By: ReplicaSet/coredns-66bff467f8 Containers: coredns: Container ID: /6baba323dcf59c6840fedcb08f3f6b553e01c96f3b5d91c7fd1a03345e5f0b73 Image: k8s.gcr.io/coredns:1.6.7 Image ID: docker-k8s.gcr.io/coredns@sha256:2c8d61c46f484d881db43b34d13ca47a269336e576c81cf007ca740fa9ec0800 Ports: 53/UDP, 53/TCP, 9153/TCP Host Ports: 0/UDP, 0/TCP, 0/TCP Args: -conf /etc/coredns/Corefile State: Running Started: Wed, 17 Jun 2020 07:51:15 +0000 Ready: True Restart Count: 0 Limits: memory: 170Mi Requests: cpu: 100m memory: 70Mi Environment: Mounts: /etc/coredns from config-volume (ro) /var/run/secrets/kubernetes.io/serviceaccount from coredns-token-dj6pn (ro) Conditions: Type Status Initialized True Ready True ContainersReady True PodScheduled True Volumes: config-volume: Type: ConfigMap (a volume populated by a ConfigMap) Name: coredns Optional: false coredns-token-dj6pn: Type: Secret (a volume populated by a Secret) SecretName: coredns-token-dj6pn Optional: false QoS Class: Burstable Node-Selectors: kubernetes.io/os=linux Events: ``` ```auto However describing the weave pod contains the new cidr while setting it up Can you please guide me where i am getting it wrong? ``` ---
**Author:** ![tej-singh-rana](https://sea2.discourse-cdn.com/flex016/user_avatar/discuss.kubernetes.io/tej-singh-rana/32/5921_2.png) [@tej-singh-rana](https://discuss.kubernetes.io/u/tej-singh-rana)\ **Post date:** [June 17, 2020, 3:55pm UTC](https://discuss.kubernetes.io/t/changing-the-ip-in-my-kubernetes-cluster-from-10-32-0-0-12-to-172-31-0-0-18/11478/2 "2020-06-17T15:55:41Z")
You would like to see the coredns ip addr change after installing weave? That’s not possible coredns is different. Its manages cluster services and weave manages docker level networking. if i am wrong correct me. ---
**Author:** ![Touseefyousuf](https://avatars.discourse-cdn.com/v4/letter/t/bb73d2/32.png) [@Touseefyousuf](https://discuss.kubernetes.io/u/Touseefyousuf)\ **Post date:** [June 17, 2020, 4:20pm UTC](https://discuss.kubernetes.io/t/changing-the-ip-in-my-kubernetes-cluster-from-10-32-0-0-12-to-172-31-0-0-18/11478/3 "2020-06-17T16:20:42Z")
the problem i am facing is when i deploy a jenkins as container it still doesnot point to new cidr ```auto Name: jenkins-deployment-6c7d7949f4-97vmx Namespace: default Priority: 0 Node: k8s-jenkins-slave/10.41.80.43 Start Time: Wed, 17 Jun 2020 08:43:11 +0000 Labels: app=jenkins pod-template-hash=6c7d7949f4 Status: Running IP: 10.244.1.2 IPs: IP: **10.244.1.2** Controlled By: ReplicaSet/jenkins-deployment-6c7d7949f4 Containers: jenkins: Container ID: docker://30438bbb9af92c319d084ad7216d39db5329332d70ecbfc66cbfc1a80d150e20 Image: jenkins/jenkins:2.222.3 Image ID: docker-pullable://jenkins/jenkins@sha256:15fca69266f4cc2107449d9fa2595acf0cbe1584eb425ee6f2fe9cefc9fc4b97 Ports: 8080/TCP, 50000/TCP Host Ports: 0/TCP, 0/TCP State: Running Started: Wed, 17 Jun 2020 08:43:38 +0000 Ready: True Restart Count: 0 Environment: JAVA_OPTS: -Djenkins.install.runSetupWizard=false CASC_JENKINS_CONFIG: /config-jcasc/jcasc.yml Mounts: /config-jcasc from jenkins-configmap-vol (rw) /var/jenkins_home from jenkins-home (rw) /var/run/secrets/kubernetes.io/serviceaccount from default-token-srt2v (ro) prometheus-sidecar: Container ID: docker://f3d5682dabdfa4bf6e1f13ac54b225d0ed5f642523c9842e9a5721df67032355 Image: quay.io/prometheus/node-exporter Image ID: docker-pullable://quay.io/prometheus/node-exporter@sha256:cf66a6bbd573fd819ea09c72e21b528e9252d58d01ae13564a29749de1e48e0f Port: 9100/TCP Host Port: 0/TCP Args: --no-collector.arp --no-collector.bcache --no-collector.bonding --no-collector.buddyinfo --no-collector.conntrack --no-collector.cpu --no-collector.cpufreq --no-collector.diskstats --no-collector.drbd --no-collector.edac --no-collector.entropy --no-collector.filefd --no-collector.hwmon --no-collector.infiniband --no-collector.interrupts --no-collector.ipvs --no-collector.ksmd --no-collector.loadavg --no-collector.logind --no-collector.mdadm --no-collector.meminfo --no-collector.meminfo_numa --no-collector.mountstats --no-collector.netclass --no-collector.netdev --no-collector.netstat --no-collector.nfs --no-collector.nfsd --no-collector.ntp --no-collector.perf --no-collector.pressure --no-collector.processes --no-collector.qdisc --no-collector.runit --no-collector.sockstat --no-collector.stat --no-collector.supervisord --no-collector.systemd --no-collector.tcpstat --no-collector.textfile --no-collector.time --no-collector.timex --no-collector.uname --no-collector.vmstat --no-collector.wifi --no-collector.xfs --no-collector.zfs State: Running Started: Wed, 17 Jun 2020 08:43:47 +0000 Ready: True Restart Count: 0 Environment: Mounts: /data/test from jenkins-home (rw) /var/run/secrets/kubernetes.io/serviceaccount from default-token-srt2v (ro) Conditions: Type Status Initialized True Ready True ContainersReady True PodScheduled True Volumes: jenkins-home: Type: HostPath (bare host directory volume) Path: /home/arbs/jenkins-home HostPathType: Directory jenkins-configmap-vol: Type: ConfigMap (a volume populated by a ConfigMap) Name: jcasc-config Optional: false default-token-srt2v: Type: Secret (a volume populated by a Secret) SecretName: default-token-srt2v Optional: false QoS Class: BestEffort Node-Selectors: Events: ```