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update command line options documentation (#372)
* update command line options documentation * add test for command line help doc
This commit is contained in:
Patrick Hemmer
Murali Reddy
parent
ed34187113
commit
4fd5cb812a
@ -99,34 +99,42 @@ Also you can choose to run kube-router as agent running on each cluster node. Al
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### command line options
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```
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Usage of ./kube-router:
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--advertise-cluster-ip Add Cluster IP of the service to the RIB so that it gets advertises to the BGP peers.
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--advertise-external-ip Add External IP of service to the RIB so that it gets advertised to the BGP peers.
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--cleanup-config Cleanup iptables rules, ipvs, ipset configuration and exit.
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--cluster-asn uint ASN number under which cluster nodes will run iBGP.
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--cluster-cidr string CIDR range of pods in the cluster. It is used to identify traffic originating from and destinated to pods.
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--config-sync-period duration The delay between apiserver configuration synchronizations (e.g. '5s', '1m'). Must be greater than 0. (default 1m0s)
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--enable-overlay When enable-overlay set to true, IP-in-IP tunneling is used for pod-to-pod networking across nodes in different subnets. When set to false no tunneling is used and routing infrastrcture is expected to route traffic for pod-to-pod networking across nodes in different subnets (default true)
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--enable-pod-egress SNAT traffic from Pods to destinations outside the cluster. (default true)
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--hairpin-mode Add iptable rules for every Service Endpoint to support hairpin traffic.
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-h, --help Print usage information.
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--hostname-override string Overrides the NodeName of the node. Set this if kube-router is unable to determine your NodeName automatically.
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--iptables-sync-period duration The delay between iptables rule synchronizations (e.g. '5s', '1m'). Must be greater than 0. (default 1m0s)
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--ipvs-sync-period duration The delay between ipvs config synchronizations (e.g. '5s', '1m', '2h22m'). Must be greater than 0. (default 1m0s)
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--kubeconfig string Path to kubeconfig file with authorization information (the master location is set by the master flag).
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--masquerade-all SNAT all traffic to cluster IP/node port.
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--master string The address of the Kubernetes API server (overrides any value in kubeconfig).
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--metrics-port int Prometheus metrics port to use ( default 8080 )
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--metrics-path string Path to serve Prometheus metrics on ( default /metrics )
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--nodeport-bindon-all-ip For service of NodePort type create IPVS service that listens on all IP's of the node.
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--nodes-full-mesh Each node in the cluster will setup BGP peering with rest of the nodes. (default true)
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--peer-router-asns uintSlice ASN numbers of the BGP peer to which cluster nodes will advertise cluster ip and node's pod cidr. (default [])
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--peer-router-ips ipSlice The ip address of the external router to which all nodes will peer and advertise the cluster ip and pod cidr's. (default [])
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--peer-router-passwords stringSlice Password for authenticating against the BGP peer defined with "--peer-router-ips".
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--routes-sync-period duration The delay between route updates and advertisements (e.g. '5s', '1m', '2h22m'). Must be greater than 0. (default 1m0s)
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--run-firewall Enables Network Policy -- sets up iptables to provide ingress firewall for pods. (default true)
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--run-router Enables Pod Networking -- Advertises and learns the routes to Pods via iBGP. (default true)
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--run-service-proxy Enables Service Proxy -- sets up IPVS for Kubernetes Services. (default true)```
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Usage of kube-router:
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--advertise-cluster-ip Add Cluster IP of the service to the RIB so that it gets advertises to the BGP peers.
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--advertise-external-ip Add External IP of service to the RIB so that it gets advertised to the BGP peers.
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--advertise-loadbalancer-ip Add LoadbBalancer IP of service status as set by the LB provider to the RIB so that it gets advertised to the BGP peers.
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--bgp-graceful-restart Enables the BGP Graceful Restart capability so that routes are preserved on unexpected restarts
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--cleanup-config Cleanup iptables rules, ipvs, ipset configuration and exit.
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--cluster-asn uint ASN number under which cluster nodes will run iBGP.
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--cluster-cidr string CIDR range of pods in the cluster. It is used to identify traffic originating from and destinated to pods.
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--config-sync-period duration The delay between apiserver configuration synchronizations (e.g. '5s', '1m'). Must be greater than 0. (default 1m0s)
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--enable-ibgp Enables peering with nodes with the same ASN, if disabled will only peer with external BGP peers (default true)
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--enable-overlay When enable-overlay set to true, IP-in-IP tunneling is used for pod-to-pod networking across nodes in different subnets. When set to false no tunneling is used and routing infrastrcture is expected to route traffic for pod-to-pod networking across nodes in different subnets (default true)
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--enable-pod-egress SNAT traffic from Pods to destinations outside the cluster. (default true)
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--enable-pprof Enables pprof for debugging performance and memory leak issues.
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--hairpin-mode Add iptable rules for every Service Endpoint to support hairpin traffic.
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--health-port uint16 Health check port, 0 = Disabled (default 20244)
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-h, --help Print usage information.
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--hostname-override string Overrides the NodeName of the node. Set this if kube-router is unable to determine your NodeName automatically.
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--iptables-sync-period duration The delay between iptables rule synchronizations (e.g. '5s', '1m'). Must be greater than 0. (default 1m0s)
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--ipvs-sync-period duration The delay between ipvs config synchronizations (e.g. '5s', '1m', '2h22m'). Must be greater than 0. (default 1m0s)
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--kubeconfig string Path to kubeconfig file with authorization information (the master location is set by the master flag).
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--masquerade-all SNAT all traffic to cluster IP/node port.
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--master string The address of the Kubernetes API server (overrides any value in kubeconfig).
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--metrics-path string Prometheus metrics path (default "/metrics")
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--metrics-port uint16 Prometheus metrics port, (Default 0, Disabled)
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--nodeport-bindon-all-ip For service of NodePort type create IPVS service that listens on all IP's of the node.
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--nodes-full-mesh Each node in the cluster will setup BGP peering with rest of the nodes. (default true)
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--peer-router-asns uints ASN numbers of the BGP peer to which cluster nodes will advertise cluster ip and node's pod cidr. (default [])
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--peer-router-ips ipSlice The ip address of the external router to which all nodes will peer and advertise the cluster ip and pod cidr's. (default [])
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--peer-router-multihop-ttl uint8 Enable eBGP multihop supports -- sets multihop-ttl. (Relevant only if ttl >= 2)
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--peer-router-passwords strings Password for authenticating against the BGP peer defined with "--peer-router-ips".
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--routes-sync-period duration The delay between route updates and advertisements (e.g. '5s', '1m', '2h22m'). Must be greater than 0. (default 1m0s)
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--run-firewall Enables Network Policy -- sets up iptables to provide ingress firewall for pods. (default true)
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--run-router Enables Pod Networking -- Advertises and learns the routes to Pods via iBGP. (default true)
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--run-service-proxy Enables Service Proxy -- sets up IPVS for Kubernetes Services. (default true)
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-v, --v string log level for V logs (default "0")
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-V, --version Print version information.
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```
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### requirements
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2
Makefile
2
Makefile
@ -39,7 +39,7 @@ kube-router:
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@echo Finished kube-router binary build.
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test: gofmt ## Runs code quality pipelines (gofmt, tests, coverage, lint, etc)
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go test github.com/cloudnativelabs/kube-router/app/... github.com/cloudnativelabs/kube-router/utils/
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go test github.com/cloudnativelabs/kube-router github.com/cloudnativelabs/kube-router/app/... github.com/cloudnativelabs/kube-router/utils/
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vagrant-up: export docker=$(DOCKER)
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vagrant-up: export DEV_IMG=$(REGISTRY_DEV):$(IMG_TAG)
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@ -14,7 +14,14 @@ import (
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)
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func main() {
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if err := Main(); err != nil {
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fmt.Fprintf(os.Stderr, "%s\n", err)
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os.Exit(1)
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}
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os.Exit(0)
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}
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func Main() error {
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config := options.NewKubeRouterConfig()
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config.AddFlags(pflag.CommandLine)
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pflag.Parse()
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@ -28,28 +35,26 @@ func main() {
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if config.HelpRequested {
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pflag.Usage()
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os.Exit(0)
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return nil
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}
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if config.Version {
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app.PrintVersion(false)
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os.Exit(0)
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return nil
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}
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if os.Geteuid() != 0 {
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fmt.Fprintf(os.Stderr, "kube-router needs to be run with privileges to execute iptables, ipset and configure ipvs\n")
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os.Exit(1)
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return fmt.Errorf("kube-router needs to be run with privileges to execute iptables, ipset and configure ipvs")
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}
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if config.CleanupConfig {
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app.CleanupConfigAndExit()
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os.Exit(0)
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return nil
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}
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kubeRouter, err := app.NewKubeRouterDefault(config)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Failed to parse kube-router config: %v\n", err)
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os.Exit(1)
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return fmt.Errorf("Failed to parse kube-router config: %v", err)
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}
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if config.EnablePprof {
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@ -60,7 +65,8 @@ func main() {
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err = kubeRouter.Run()
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if err != nil {
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fmt.Fprintf(os.Stderr, "Failed to run kube-router: %v\n", err)
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os.Exit(1)
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return fmt.Errorf("Failed to run kube-router: %v", err)
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}
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return nil
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}
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49
kube-router_test.go
Normal file
49
kube-router_test.go
Normal file
@ -0,0 +1,49 @@
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package main
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import (
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"bytes"
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"io"
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"os"
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"sync"
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"testing"
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)
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func TestMainHelp(t *testing.T) {
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origStderr := os.Stderr
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stderrR, stderrW, _ := os.Pipe()
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os.Stderr = stderrW
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defer func() { os.Stderr = origStderr }()
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stderrBuf := bytes.NewBuffer(nil)
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wg := &sync.WaitGroup{}
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wg.Add(1)
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go func() {
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io.Copy(stderrBuf, stderrR)
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wg.Done()
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}()
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origArgs := os.Args
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os.Args = []string{"kube-router", "--help"}
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defer func() { os.Args = origArgs }()
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if err := Main(); err != nil {
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t.Fatalf("kube-router exited with error: %s\n", err)
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}
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stderrW.Close()
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wg.Wait()
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docF, err := os.Open("Documentation/README.md")
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if err != nil {
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t.Fatalf("could not open Documentation/README.md: %s\n", err)
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}
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docBuf := bytes.NewBuffer(nil)
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docBuf.ReadFrom(docF)
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docF.Close()
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exp := append([]byte("```\n"), stderrBuf.Bytes()...)
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exp = append(exp, []byte("```\n")...)
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if !bytes.Contains(docBuf.Bytes(), exp) {
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t.Errorf("Documentation/README.md 'command line options' section does not match `kube-router --help`.\nExpected:\n%s", exp)
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}
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}
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