Fix dualstack IPv6 addr assignment issue in rockylinux and RHEL (#1442)

Signed-off-by: Sachin Tiptur <[email protected]> Signed-off-by: Sachin Tiptur <[email protected]> Co-authored-by: Sachin Tiptur <[email protected]>
kubermatic · Sep 26, 2022 · f7b9474 · f7b9474
1 parent abd0793
commit f7b9474
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Showing 20 changed files with 200 additions and 80 deletions.
diff --git a/pkg/userdata/rhel/provider.go b/pkg/userdata/rhel/provider.go
@@ -232,10 +232,16 @@ write_files:
 {{ .ContainerRuntimeScript | indent 4 }}
 {{ safeDownloadBinariesScript .KubeletVersion | indent 4 }}
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+              
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.22-aws.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.22-aws.yaml
@@ -168,10 +168,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.22-nutanix.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.22-nutanix.yaml
@@ -176,10 +176,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.23-aws-external.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.23-aws-external.yaml
@@ -168,10 +168,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.23-aws.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.23-aws.yaml
@@ -168,10 +168,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.23-vsphere-mirrors.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.23-vsphere-mirrors.yaml
@@ -182,10 +182,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.23-vsphere-proxy.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.23-vsphere-proxy.yaml
@@ -182,10 +182,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.23-vsphere.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.23-vsphere.yaml
@@ -174,10 +174,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.24-aws-external.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.24-aws-external.yaml
@@ -167,10 +167,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/kubelet-v1.24-aws.yaml b/pkg/userdata/rhel/testdata/kubelet-v1.24-aws.yaml
@@ -167,10 +167,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rhel/testdata/pod-cidr-azure-rhel.yaml b/pkg/userdata/rhel/testdata/pod-cidr-azure-rhel.yaml
@@ -173,10 +173,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rockylinux/provider.go b/pkg/userdata/rockylinux/provider.go
@@ -234,10 +234,16 @@ write_files:
 {{ .ContainerRuntimeScript | indent 4 }}
 {{ safeDownloadBinariesScript .KubeletVersion | indent 4 }}
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rockylinux/testdata/kubelet-v1.22-aws.yaml b/pkg/userdata/rockylinux/testdata/kubelet-v1.22-aws.yaml
@@ -169,10 +169,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rockylinux/testdata/kubelet-v1.23-aws-external.yaml b/pkg/userdata/rockylinux/testdata/kubelet-v1.23-aws-external.yaml
@@ -169,10 +169,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rockylinux/testdata/kubelet-v1.23-aws.yaml b/pkg/userdata/rockylinux/testdata/kubelet-v1.23-aws.yaml
@@ -169,10 +169,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rockylinux/testdata/kubelet-v1.23-nutanix.yaml b/pkg/userdata/rockylinux/testdata/kubelet-v1.23-nutanix.yaml
@@ -176,10 +176,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/

diff --git a/pkg/userdata/rockylinux/testdata/kubelet-v1.23-vsphere-mirrors.yaml b/pkg/userdata/rockylinux/testdata/kubelet-v1.23-vsphere-mirrors.yaml
@@ -182,10 +182,16 @@ write_files:
     fi
 
     DEFAULT_IFC_NAME=$(ip -o route get 1  | grep -oP "dev \K\S+")
-    echo NETWORKING_IPV6=yes >> /etc/sysconfig/network
-    echo IPV6INIT=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    echo DHCPV6C=yes >> /etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
-    ifdown $DEFAULT_IFC_NAME && ifup $DEFAULT_IFC_NAME
+    IFC_CFG_FILE=/etc/sysconfig/network-scripts/ifcfg-$DEFAULT_IFC_NAME
+    # Enable IPv6 and DHCPv6 on the default interface
+    grep IPV6INIT $IFC_CFG_FILE && sed -i '/IPV6INIT*/c IPV6INIT=yes' $IFC_CFG_FILE || echo "IPV6INIT=yes" >> $IFC_CFG_FILE
+    grep DHCPV6C $IFC_CFG_FILE && sed -i '/DHCPV6C*/c DHCPV6C=yes' $IFC_CFG_FILE || echo "DHCPV6C=yes" >> $IFC_CFG_FILE
+    grep IPV6_AUTOCONF $IFC_CFG_FILE && sed -i '/IPV6_AUTOCONF*/c IPV6_AUTOCONF=yes' $IFC_CFG_FILE || echo "IPV6_AUTOCONF=yes" >> $IFC_CFG_FILE
+
+    # Restart NetworkManager to apply for IPv6 configs
+    systemctl restart NetworkManager
+    # Let NetworkManager apply the DHCPv6 configs
+    sleep 3
 
     # set kubelet nodeip environment variable
     mkdir -p /etc/systemd/system/kubelet.service.d/