Fixes#4191#4993
This bumps Kubernetes client-go to the latest v0.19.2 (We had to switch directly to 1.19 because of this issue). Bumping to v0.19.2 required upgrading to smi-sdk-go v0.4.1. This also depends on linkerd/stern#5
This consists of the following changes:
- Fix ./bin/update-codegen.sh by adding the template path to the gen commands, as it is needed after we moved to GOMOD.
- Bump all k8s related dependencies to v0.19.2
- Generate CRD types, client code using the latest k8s.io/code-generator
- Use context.Context as the first argument, in all code paths that touch the k8s client-go interface
Signed-off-by: Tarun Pothulapati <tarunpothulapati@outlook.com>
* Add namespace global flag to hold default namespace name (#4469)
Signed-off-by: Matei David <matei.david.35@gmail.com>
* Change name of controlplane install namespace constant and init point for kubeNamespace
Signed-off-by: Matei David <matei.david.35@gmail.com>
When using cli commands that work on namespaced resources in the cluster, the default namespace used by the cli is hardcoded to the default Kubernetes namespace (i.e 'default'). This update will allow cli commands that operate on namespaced resources to automatically infer what the name of the default namespace is, by taking the relevant default from the currently used Kubeconfig context. In short, this allows the omission of the -n flag in commands such as linkerd metrics, when working with resources that belong to a namespace that is set as default in the currently active context.
Validation was done manually by setting the default namespace of the currently used context, as well as through two integration tests that target the tap and get command respectively.
Signed-off-by: Matei David <matei.david.35@gmail.com>
* CLI command to fetch control plane metrics
Fixes#3116
* Add GetResonse method to return http GET response
* Implemented timeouts using waitgroups
* Refactor metrics command by extracting common code to metrics_diagnostics_util
* Refactor diagnostics to remove code duplication
* Update portforward_test for NewContainerMetricsForward function
* Lint code
* Incorporate Alex's suggestions
* Lint code
* fix minor errors
* Add unit test for getAllContainersWithPort
* Update metrics and diagnostics to store results in a buffer and print once
* Incorporate Ivan's suggestions
* consistent error handling inside diagnostics
* add coloring for the output
* spawn goroutines for each pod instead of each container
* switch back to unbuffered channel
* remove coloring in the output
* Add a long description of the command
Signed-off-by: Saurav Tiwary <srv.twry@gmail.com>
* cli: handle `linkerd metrics` port-forward gracefully
- add return for routine in func `Init()` in case of error
- add return from func `getMetrics()` if error from `portforward.Init()`
* Remove select block at pkg/k8s/portforward.go
- It is now the caller's responsibility to call pf.Stop()
Signed-off-by: Mayank Shah <mayankshah1614@gmail.com>
This PR adds support for CronJobs and ReplicaSets to `linkerd inject`, the web
dashboard and CLI. It adds a new Grafana dashboard for each kind of resource.
Closes#3614Closes#3630Closes#3584Closes#3585
Signed-off-by: Sergio Castaño Arteaga tegioz@icloud.com
Signed-off-by: Cintia Sanchez Garcia cynthiasg@icloud.com
Similar to `kubectl --as`, global flag across all linkerd subcommands
which sets a `ImpersonationConfig` in the Kubernetes API config.
Signed-off-by: Andrew Seigner <siggy@buoyant.io>
* Simplify port-forwarding code
Simplifies the establishment of a port-forwarding by moving the common
logic into `PortForward.Init()`
Stemmed from this
[comment](https://github.com/linkerd/linkerd2/pull/2937#discussion_r295078800)
Signed-off-by: Alejandro Pedraza <alejandro@buoyant.io>
Numerous codepaths have emerged that create k8s configs, k8s clients,
and make k8s api requests.
This branch consolidates k8s client creation and APIs. The primary
change migrates most codepaths to call `k8s.NewAPI` to instantiate a
`KubernetesAPI` struct from `pkg`. `KubernetesAPI` implements the
`kubernetes.Interface` (clientset) interface, and also persists a
`client-go` `rest.Config`.
Specific list of changes:
- removes manual GET requests from `k8s.KubernetesAPI`, in favor of
clientsets
- replaces most calls to `k8s.GetConfig`+`kubernetes.NewForConfig` with
a single `k8s.NewAPI`
- introduces a `timeout` param to `k8s.NewAPI`, currently only used by
healthchecks
- removes `NewClientSet` in `controller/k8s/clientset.go` in favor of
`k8s.NewAPI`
- removes `httpClient` and `clientset` from `HealthChecker`, use
`KubernetesAPI` instead
Signed-off-by: Andrew Seigner <siggy@buoyant.io>
It's sometimes helpful to spotcheck proxy metrics from a specific pod,
but doing so with kubectl requires a few steps.
Introduce a new `linkerd metrics` command. When given a pod name and
namespace, returns a dump of the proxy's /metrics endpoint.
Also modify the k8s.portforward module to accept initialized k8s config
and client objects, to enable testing.
Fixes#2350.
Signed-off-by: Andrew Seigner <siggy@buoyant.io>
Tarun Pothulapati
Matei David
Saurav Tiwary
Mayank Shah
Sergio C. Arteaga
Andrew Seigner
Alejandro Pedraza
Andrew Seigner