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Clean up kubelet iptables error messages

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Their syntax seems to have gotten mangled in the structured logging
migration...
This commit is contained in:
Dan Winship 2022-04-25 15:28:12 -04:00
parent b7e977d497
commit 02c8210317
1 changed files with 16 additions and 16 deletions
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32
pkg/kubelet/kubelet_network_linux.go
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@ -58,7 +58,7 @@ func (kl *Kubelet) initNetworkUtil() {
for i := range iptClients {
iptClient := iptClients[i]
if kl.syncNetworkUtil(iptClient) {
klog.InfoS("Initialized protocol iptables rules.", "protocol", iptClient.Protocol())
klog.InfoS("Initialized iptables rules.", "protocol", iptClient.Protocol())
go iptClient.Monitor(
utiliptables.Chain("KUBE-KUBELET-CANARY"),
[]utiliptables.Table{utiliptables.TableMangle, utiliptables.TableNAT, utiliptables.TableFilter},
@ -66,7 +66,7 @@ func (kl *Kubelet) initNetworkUtil() {
1*time.Minute, wait.NeverStop,
)
} else {
klog.InfoS("Failed to initialize protocol iptables rules; some functionality may be missing.", "protocol", iptClient.Protocol())
klog.InfoS("Failed to initialize iptables rules; some functionality may be missing.", "protocol", iptClient.Protocol())
}
}
}
@ -81,22 +81,22 @@ func (kl *Kubelet) syncNetworkUtil(iptClient utiliptables.Interface) bool {
// Setup KUBE-MARK-DROP rules
dropMark := getIPTablesMark(kl.iptablesDropBit)
if _, err := iptClient.EnsureChain(utiliptables.TableNAT, KubeMarkDropChain); err != nil {
klog.ErrorS(err, "Failed to ensure that nat chain exists KUBE-MARK-DROP chain")
klog.ErrorS(err, "Failed to ensure that KUBE-MARK-DROP chain exists")
return false
}
if _, err := iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubeMarkDropChain, "-j", "MARK", "--or-mark", dropMark); err != nil {
klog.ErrorS(err, "Failed to ensure marking rule for KUBE-MARK-DROP chain")
klog.ErrorS(err, "Failed to ensure that KUBE-MARK-DROP rule exists")
return false
}
if _, err := iptClient.EnsureChain(utiliptables.TableFilter, KubeFirewallChain); err != nil {
klog.ErrorS(err, "Failed to ensure that filter table exists KUBE-FIREWALL chain")
klog.ErrorS(err, "Failed to ensure that KUBE-FIREWALL chain exists")
return false
}
if _, err := iptClient.EnsureRule(utiliptables.Append, utiliptables.TableFilter, KubeFirewallChain,
"-m", "comment", "--comment", "kubernetes firewall for dropping marked packets",
"-m", "mark", "--mark", fmt.Sprintf("%s/%s", dropMark, dropMark),
"-j", "DROP"); err != nil {
klog.ErrorS(err, "Failed to ensure rule to drop packet marked by the KUBE-MARK-DROP in KUBE-FIREWALL chain")
klog.ErrorS(err, "Failed to ensure that KUBE-FIREWALL rule exists")
return false
}
@ -110,37 +110,37 @@ func (kl *Kubelet) syncNetworkUtil(iptClient utiliptables.Interface) bool {
"-m", "conntrack",
"!", "--ctstate", "RELATED,ESTABLISHED,DNAT",
"-j", "DROP"); err != nil {
klog.ErrorS(err, "Failed to ensure rule to drop invalid localhost packets in filter table KUBE-FIREWALL chain")
klog.ErrorS(err, "Failed to ensure rule to drop invalid localhost packets exists")
return false
}
}
if _, err := iptClient.EnsureRule(utiliptables.Prepend, utiliptables.TableFilter, utiliptables.ChainOutput, "-j", string(KubeFirewallChain)); err != nil {
klog.ErrorS(err, "Failed to ensure that filter table from OUTPUT chain jumps to KUBE-FIREWALL chain")
klog.ErrorS(err, "Failed to ensure that OUTPUT chain jumps to KUBE-FIREWALL")
return false
}
if _, err := iptClient.EnsureRule(utiliptables.Prepend, utiliptables.TableFilter, utiliptables.ChainInput, "-j", string(KubeFirewallChain)); err != nil {
klog.ErrorS(err, "Failed to ensure that filter table INPUT chain jumps to KUBE-FIREWALL chain")
klog.ErrorS(err, "Failed to ensure that INPUT chain jumps to KUBE-FIREWALL")
return false
}
// Setup KUBE-MARK-MASQ rules
masqueradeMark := getIPTablesMark(kl.iptablesMasqueradeBit)
if _, err := iptClient.EnsureChain(utiliptables.TableNAT, KubeMarkMasqChain); err != nil {
klog.ErrorS(err, "Failed to ensure that nat table exists KUBE-MARK-MASQ chain")
klog.ErrorS(err, "Failed to ensure that KUBE-MARK-MASQ chain exists")
return false
}
if _, err := iptClient.EnsureChain(utiliptables.TableNAT, KubePostroutingChain); err != nil {
klog.ErrorS(err, "Failed to ensure that nat table exists kube POSTROUTING chain")
klog.ErrorS(err, "Failed to ensure that KUBE-POSTROUTING chain exists")
return false
}
if _, err := iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubeMarkMasqChain, "-j", "MARK", "--or-mark", masqueradeMark); err != nil {
klog.ErrorS(err, "Failed to ensure marking rule for KUBE-MARK-MASQ chain")
klog.ErrorS(err, "Failed to ensure that KUBE-MARK-MASQ rule exists")
return false
}
if _, err := iptClient.EnsureRule(utiliptables.Prepend, utiliptables.TableNAT, utiliptables.ChainPostrouting,
"-m", "comment", "--comment", "kubernetes postrouting rules", "-j", string(KubePostroutingChain)); err != nil {
klog.ErrorS(err, "Failed to ensure that nat table from POSTROUTING chain jumps to KUBE-POSTROUTING chain")
klog.ErrorS(err, "Failed to ensure that POSTROUTING chain jumps to KUBE-POSTROUTING")
return false
}
@ -150,7 +150,7 @@ func (kl *Kubelet) syncNetworkUtil(iptClient utiliptables.Interface) bool {
if _, err := iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubePostroutingChain,
"-m", "mark", "!", "--mark", fmt.Sprintf("%s/%s", masqueradeMark, masqueradeMark),
"-j", "RETURN"); err != nil {
klog.ErrorS(err, "Failed to ensure filtering rule for KUBE-POSTROUTING chain")
klog.ErrorS(err, "Failed to ensure first masquerading rule exists")
return false
}
// Clear the mark to avoid re-masquerading if the packet re-traverses the network stack.
@ -158,7 +158,7 @@ func (kl *Kubelet) syncNetworkUtil(iptClient utiliptables.Interface) bool {
// to Sprintf another bitmask).
if _, err := iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubePostroutingChain,
"-j", "MARK", "--xor-mark", masqueradeMark); err != nil {
klog.ErrorS(err, "Failed to ensure unmarking rule for KUBE-POSTROUTING chain")
klog.ErrorS(err, "Failed to ensure second masquerading rule exists")
return false
}
masqRule := []string{
@ -169,7 +169,7 @@ func (kl *Kubelet) syncNetworkUtil(iptClient utiliptables.Interface) bool {
masqRule = append(masqRule, "--random-fully")
}
if _, err := iptClient.EnsureRule(utiliptables.Append, utiliptables.TableNAT, KubePostroutingChain, masqRule...); err != nil {
klog.ErrorS(err, "Failed to ensure SNAT rule for packets marked by KUBE-MARK-MASQ chain in nat table KUBE-POSTROUTING chain")
klog.ErrorS(err, "Failed to ensure third masquerading rule exists")
return false
}