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General-purpose web UI for Kubernetes clusters
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local-up-cluster errors out with kubelet unknown flag --config #1987

Closed timothyjosefik closed 7 years ago

timothyjosefik commented 7 years ago
Environment
Dashboard version:
Kubernetes version:
Operating system: Mac OS X 10.11.6
Node.js version: v7.4.0
Go version: go1.8 darwin/amd64
Steps to reproduce
  1. clone repo and run npm install
  2. run gulp local-up-cluster
    Observed result
  3. Kubelet does not start
    Expected
  4. Kubelet starts
Comments

Logs from kubelet Flag --api-servers has been deprecated, Use --kubeconfig instead. Will be removed in a future version. Error: unknown flag: --config

The kubelet binary is responsible for maintaining a set of containers on a

particular node. It syncs data from a variety of sources including a Kubernetes API server, an etcd cluster, HTTP endpoint or local file. It then queries Docker to see what is currently running. It synchronizes the configuration data, with the running set of containers by starting or stopping Docker containers. Usage: kubelet [flags]

Available Flags: --address ip The IP address for the Kubelet to serve on (set to 0.0.0.0 for all interfaces) (default 0.0.0.0) --allow-privileged If true, allow containers to request privileged mode. [default=false] --allow-verification-with-non-compliant-keys Allow a SignatureVerifier to use keys which are technically non-compliant with RFC6962. --alsologtostderr log to standard error as well as files --anonymous-auth Enables anonymous requests to the Kubelet server. Requests that are not rejected by another authentication method are treated as anonymous requests. Anonymous requests have a username of system:anonymous, and a group name of system:unauthenticated. (default true) --application-metrics-count-limit int Max number of application metrics to store (per container) (default 100) --authentication-token-webhook Use the TokenReview API to determine authentication for bearer tokens. --authentication-token-webhook-cache-ttl duration The duration to cache responses from the webhook token authenticator. (default 2m0s) --authorization-mode string Authorization mode for Kubelet server. Valid options are AlwaysAllow or Webhook. Webhook mode uses the SubjectAccessReview API to determine authorization. (default "AlwaysAllow") --authorization-webhook-cache-authorized-ttl duration The duration to cache 'authorized' responses from the webhook authorizer. (default 5m0s) --authorization-webhook-cache-unauthorized-ttl duration The duration to cache 'unauthorized' responses from the webhook authorizer. (default 30s) --azure-container-registry-config string Path to the file container Azure container registry configuration information. --boot-id-file string Comma-separated list of files to check for boot-id. Use the first one that exists. (default "/proc/sys/kernel/random/boot_id") --cadvisor-port int32 The port of the localhost cAdvisor endpoint (default 4194) --cert-dir string The directory where the TLS certs are located (by default /var/run/kubernetes). If --tls-cert-file and --tls-private-key-file are provided, this flag will be ignored. (default "/var/run/kubernetes") --cgroup-driver string Driver that the kubelet uses to manipulate cgroups on the host. Possible values: 'cgroupfs', 'systemd' (default "cgroupfs") --cgroup-root string Optional root cgroup to use for pods. This is handled by the container runtime on a best effort basis. Default: '', which means use the container runtime default. --cgroups-per-qos Enable creation of QoS cgroup hierarchy, if true top level QoS and pod cgroups are created. [default: true] (default true) --chaos-chance float If > 0.0, introduce random client errors and latency. Intended for testing. [default=0.0] --client-ca-file string If set, any request presenting a client certificate signed by one of the authorities in the client-ca-file is authenticated with an identity corresponding to the CommonName of the client certificate. --cloud-config string The path to the cloud provider configuration file. Empty string for no configuration file. --cloud-provider string The provider for cloud services. By default, kubelet will attempt to auto-detect the cloud provider. Specify empty string for running with no cloud provider. [default=auto-detect] (default "auto-detect") --cluster-dns stringSlice Comma-separated list of DNS server IP address. This value is used for containers DNS server in case of Pods with "dnsPolicy=ClusterFirst". Note: all DNS servers appearing in the list MUST serve the same set of records otherwise name resolution within the cluster may not work correctly. There is no guarantee as to which DNS server may be contacted for name resolution. --cluster-domain string Domain for this cluster. If set, kubelet will configure all containers to search this domain in addition to the host's search domains --cni-bin-dir string The full path of the directory in which to search for CNI plugin binaries. Default: /opt/cni/bin --cni-conf-dir string The full path of the directory in which to search for CNI config files. Default: /etc/cni/net.d --container-hints string location of the container hints file (default "/etc/cadvisor/container_hints.json") --container-runtime string The container runtime to use. Possible values: 'docker', 'rkt'. Default: 'docker'. (default "docker") --container-runtime-endpoint string [Experimental] The unix socket endpoint of remote runtime service. The endpoint is used only when CRI integration is enabled (--enable-cri) --containerized Experimental support for running kubelet in a container. Intended for testing. [default=false] --contention-profiling Enable lock contention profiling, if profiling is enabled --cpu-cfs-quota Enable CPU CFS quota enforcement for containers that specify CPU limits (default true) --default-not-ready-toleration-seconds int Indicates the tolerationSeconds of the toleration for notReady:NoExecute that is added by default to every pod that does not already have such a toleration. (default 300) --default-unreachable-toleration-seconds int Indicates the tolerationSeconds of the toleration for unreachable:NoExecute that is added by default to every pod that does not already have such a toleration. (default 300) --docker string docker endpoint (default "unix:///var/run/docker.sock") --docker-endpoint string Use this for the docker endpoint to communicate with (default "unix:///var/run/docker.sock") --docker-env-metadata-whitelist string a comma-separated list of environment variable keys that needs to be collected for docker containers --docker-only Only report docker containers in addition to root stats --docker-root string DEPRECATED: docker root is read from docker info (this is a fallback, default: /var/lib/docker) (default "/var/lib/docker") --enable-controller-attach-detach Enables the Attach/Detach controller to manage attachment/detachment of volumes scheduled to this node, and disables kubelet from executing any attach/detach operations (default true) --enable-custom-metrics Support for gathering custom metrics. --enable-debugging-handlers Enables server endpoints for log collection and local running of containers and commands (default true) --enable-load-reader Whether to enable cpu load reader --enable-server Enable the Kubelet's server (default true) --enforce-node-allocatable stringSlice A comma separated list of levels of node allocatable enforcement to be enforced by kubelet. Acceptible options are 'pods', 'system-reserved' & 'kube-reserved'. If the latter two options are specified, '--system-reserved-cgroup' & '--kube-reserved-cgroup' must also be set respectively. See https://github.com/kubernetes/community/blob/master/contributors/design-proposals/node-allocatable.md for more details. [default='pods'] (default [pods]) --event-burst int32 Maximum size of a bursty event records, temporarily allows event records to burst to this number, while still not exceeding event-qps. Only used if --event-qps > 0 (default 10) --event-qps int32 If > 0, limit event creations per second to this value. If 0, unlimited. (default 5) --event-storage-age-limit string Max length of time for which to store events (per type). Value is a comma separated list of key values, where the keys are event types (e.g.: creation, oom) or "default" and the value is a duration. Default is applied to all non-specified event types (default "default=0") --event-storage-event-limit string Max number of events to store (per type). Value is a comma separated list of key values, where the keys are event types (e.g.: creation, oom) or "default" and the value is an integer. Default is applied to all non-specified event types (default "default=0") --eviction-hard string A set of eviction thresholds (e.g. memory.available<1Gi) that if met would trigger a pod eviction. (default "memory.available<100Mi") --eviction-max-pod-grace-period int32 Maximum allowed grace period (in seconds) to use when terminating pods in response to a soft eviction threshold being met. If negative, defer to pod specified value. --eviction-minimum-reclaim string A set of minimum reclaims (e.g. imagefs.available=2Gi) that describes the minimum amount of resource the kubelet will reclaim when performing a pod eviction if that resource is under pressure. --eviction-pressure-transition-period duration Duration for which the kubelet has to wait before transitioning out of an eviction pressure condition. (default 5m0s) --eviction-soft string A set of eviction thresholds (e.g. memory.available<1.5Gi) that if met over a corresponding grace period would trigger a pod eviction. --eviction-soft-grace-period string A set of eviction grace periods (e.g. memory.available=1m30s) that correspond to how long a soft eviction threshold must hold before triggering a pod eviction. --exit-on-lock-contention Whether kubelet should exit upon lock-file contention. --experimental-allocatable-ignore-eviction When set to 'true', Hard Eviction Thresholds will be ignored while calculating Node Allocatable. See https://github.com/kubernetes/community/blob/master/contributors/design-proposals/node-allocatable.md for more details. [default=false] --experimental-allowed-unsafe-sysctls stringSlice Comma-separated whitelist of unsafe sysctls or unsafe sysctl patterns (ending in ). Use these at your own risk. --experimental-bootstrap-kubeconfig string Path to a kubeconfig file that will be used to get client certificate for kubelet. If the file specified by --kubeconfig does not exist, the bootstrap kubeconfig is used to request a client certificate from the API server. On success, a kubeconfig file referencing the generated key and obtained certificate is written to the path specified by --kubeconfig. The certificate and key file will be stored in the directory pointed by --cert-dir. --experimental-check-node-capabilities-before-mount [Experimental] if set true, the kubelet will check the underlying node for required componenets (binaries, etc.) before performing the mount --experimental-fail-swap-on Makes the Kubelet fail to start if swap is enabled on the node. This is a temporary opton to maintain legacy behavior, failing due to swap enabled will happen by default in v1.6. --experimental-kernel-memcg-notification If enabled, the kubelet will integrate with the kernel memcg notification to determine if memory eviction thresholds are crossed rather than polling. --experimental-mounter-path string [Experimental] Path of mounter binary. Leave empty to use the default mount. --experimental-qos-reserved mapStringString A set of ResourceName=Percentage (e.g. memory=50%) pairs that describe how pod resource requests are reserved at the QoS level. Currently only memory is supported. [default=none] --feature-gates string A set of key=value pairs that describe feature gates for alpha/experimental features. Options are: Accelerators=true|false (ALPHA - default=false) AffinityInAnnotations=true|false (ALPHA - default=false) AllAlpha=true|false (ALPHA - default=false) AllowExtTrafficLocalEndpoints=true|false (BETA - default=true) AppArmor=true|false (BETA - default=true) DynamicKubeletConfig=true|false (ALPHA - default=false) DynamicVolumeProvisioning=true|false (ALPHA - default=true) ExperimentalCriticalPodAnnotation=true|false (ALPHA - default=false) ExperimentalHostUserNamespaceDefaulting=true|false (BETA - default=false) StreamingProxyRedirects=true|false (BETA - default=true) TaintBasedEvictions=true|false (ALPHA - default=false) --file-check-frequency duration Duration between checking config files for new data (default 20s) --global-housekeeping-interval duration Interval between global housekeepings (default 1m0s) --google-json-key string The Google Cloud Platform Service Account JSON Key to use for authentication. --hairpin-mode string How should the kubelet setup hairpin NAT. This allows endpoints of a Service to loadbalance back to themselves if they should try to access their own Service. Valid values are "promiscuous-bridge", "hairpin-veth" and "none". (default "promiscuous-bridge") --healthz-bind-address ip The IP address for the healthz server to serve on, defaulting to 127.0.0.1 (set to 0.0.0.0 for all interfaces) (default 127.0.0.1) --healthz-port int32 The port of the localhost healthz endpoint (default 10248) -h, --help help for hyperkube --host-ipc-sources stringSlice Comma-separated list of sources from which the Kubelet allows pods to use the host ipc namespace. [default=""] (default []) --host-network-sources stringSlice Comma-separated list of sources from which the Kubelet allows pods to use of host network. [default=""] (default []) --host-pid-sources stringSlice Comma-separated list of sources from which the Kubelet allows pods to use the host pid namespace. [default=""] (default [*]) --hostname-override string If non-empty, will use this string as identification instead of the actual hostname. --housekeeping-interval duration Interval between container housekeepings (default 10s) --http-check-frequency duration Duration between checking http for new data (default 20s) --image-gc-high-threshold int32 The percent of disk usage after which image garbage collection is always run. Default: 90% (default 90) --image-gc-low-threshold int32 The percent of disk usage before which image garbage collection is never run. Lowest disk usage to garbage collect to. Default: 80% (default 80) --image-pull-progress-deadline duration If no pulling progress is made before this deadline, the image pulling will be cancelled. Default: 1m0s. (default 1m0s) --image-service-endpoint string [Experimental] The unix socket endpoint of remote image service. If not specified, it will be the same with container-runtime-endpoint by default. The endpoint is used only when CRI integration is enabled (--enable-cri) --iptables-drop-bit int32 The bit of the fwmark space to mark packets for dropping. Must be within the range [0, 31]. (default 15) --iptables-masquerade-bit int32 The bit of the fwmark space to mark packets for SNAT. Must be within the range [0, 31]. Please match this parameter with corresponding parameter in kube-proxy. (default 14) --ir-data-source string Data source used by InitialResources. Supported options: influxdb, gcm. (default "influxdb") --ir-dbname string InfluxDB database name which contains metrics required by InitialResources (default "k8s") --ir-hawkular string Hawkular configuration URL --ir-influxdb-host string Address of InfluxDB which contains metrics required by InitialResources (default "localhost:8080/api/v1/namespaces/kube-system/services/monitoring-influxdb:api/proxy") --ir-namespace-only Whether the estimation should be made only based on data from the same namespace. --ir-password string Password used for connecting to InfluxDB (default "root") --ir-percentile int Which percentile of samples should InitialResources use when estimating resources. For experiment purposes. (default 90) --ir-user string User used for connecting to InfluxDB (default "root") --keep-terminated-pod-volumes Keep terminated pod volumes mounted to the node after the pod terminates. Can be useful for debugging volume related issues. --kube-api-burst int32 Burst to use while talking with kubernetes apiserver (default 10) --kube-api-content-type string Content type of requests sent to apiserver. (default "application/vnd.kubernetes.protobuf") --kube-api-qps int32 QPS to use while talking with kubernetes apiserver (default 5) --kube-reserved mapStringString A set of ResourceName=ResourceQuantity (e.g. cpu=200m,memory=500Mi) pairs that describe resources reserved for kubernetes system components. Currently only cpu and memory are supported. See http://kubernetes.io/docs/user-guide/compute-resources for more detail. [default=none] --kube-reserved-cgroup string Absolute name of the top level cgroup that is used to manage kubernetes components for which compute resources were reserved via '--kube-reserved' flag. Ex. '/kube-reserved'. [default=''] --kubeconfig string Path to a kubeconfig file, specifying how to connect to the API server. --api-servers will be used for the location unless --require-kubeconfig is set. (default "/var/lib/kubelet/kubeconfig") --kubelet-cgroups string Optional absolute name of cgroups to create and run the Kubelet in. --lock-file string The path to file for kubelet to use as a lock file. --log-backtrace-at traceLocation when logging hits line file:N, emit a stack trace (default :0) --log-cadvisor-usage Whether to log the usage of the cAdvisor container --log-dir string If non-empty, write log files in this directory --log-flush-frequency duration Maximum number of seconds between log flushes (default 5s) --loglevel int Log level (0 = DEBUG, 5 = FATAL) (default 1) --logtostderr log to standard error instead of files (default true) --machine-id-file string Comma-separated list of files to check for machine-id. Use the first one that exists. (default "/etc/machine-id,/var/lib/dbus/machine-id") --make-iptables-util-chains If true, kubelet will ensure iptables utility rules are present on host. (default true) --manifest-url string URL for accessing the container manifest --manifest-url-header string HTTP header to use when accessing the manifest URL, with the key separated from the value with a ':', as in 'key:value' --master-service-namespace string The namespace from which the kubernetes master services should be injected into pods (default "default") --max-open-files int Number of files that can be opened by Kubelet process. [default=1000000] (default 1000000) --max-pods int32 Number of Pods that can run on this Kubelet. (default 110) --minimum-image-ttl-duration duration Minimum age for an unused image before it is garbage collected. Examples: '300ms', '10s' or '2h45m'. Default: '2m' (default 2m0s) --network-plugin string The name of the network plugin to be invoked for various events in kubelet/pod lifecycle --network-plugin-dir string The full path of the directory in which to search for network plugins or CNI config --network-plugin-mtu int32 The MTU to be passed to the network plugin, to override the default. Set to 0 to use the default 1460 MTU. --node-ip string IP address of the node. If set, kubelet will use this IP address for the node --node-labels mapStringString Labels to add when registering the node in the cluster. Labels must be key=value pairs separated by ','. --node-status-update-frequency duration Specifies how often kubelet posts node status to master. Note: be cautious when changing the constant, it must work with nodeMonitorGracePeriod in nodecontroller. Default: 10s (default 10s) --non-masquerade-cidr string Traffic to IPs outside this range will use IP masquerade. (default "10.0.0.0/8") --oom-score-adj int32 The oom-score-adj value for kubelet process. Values must be within the range [-1000, 1000] (default -999) --pod-cidr string The CIDR to use for pod IP addresses, only used in standalone mode. In cluster mode, this is obtained from the master. --pod-infra-container-image string The image whose network/ipc namespaces containers in each pod will use. (default "gcr.io/google_containers/pause-amd64:3.0") --pod-manifest-path string Path to to the directory containing pod manifest files to run, or the path to a single pod manifest file. Files starting with dots will be ignored. --pods-per-core int32 Number of Pods per core that can run on this Kubelet. The total number of Pods on this Kubelet cannot exceed max-pods, so max-pods will be used if this calculation results in a larger number of Pods allowed on the Kubelet. A value of 0 disables this limit. --port int32 The port for the Kubelet to serve on. (default 10250) --protect-kernel-defaults Default kubelet behaviour for kernel tuning. If set, kubelet errors if any of kernel tunables is different than kubelet defaults. --read-only-port int32 The read-only port for the Kubelet to serve on with no authentication/authorization (set to 0 to disable) (default 10255) --really-crash-for-testing If true, when panics occur crash. Intended for testing. --register-node Register the node with the apiserver (defaults to true if --api-servers is set) (default true) --register-with-taints []api.Taint Register the node with the given list of taints (comma seperated "=:"). No-op if register-node is false. --registry-burst int32 Maximum size of a bursty pulls, temporarily allows pulls to burst to this number, while still not exceeding registry-qps. Only used if --registry-qps > 0 (default 10) --registry-qps int32 If > 0, limit registry pull QPS to this value. If 0, unlimited. [default=5.0] (default 5) --require-kubeconfig If true the Kubelet will exit if there are configuration errors, and will ignore the value of --api-servers in favor of the server defined in the kubeconfig file. --resolv-conf string Resolver configuration file used as the basis for the container DNS resolution configuration. (default "/etc/resolv.conf") --rkt-api-endpoint string The endpoint of the rkt API service to communicate with. Only used if --container-runtime='rkt'. (default "localhost:15441") --rkt-path string Path of rkt binary. Leave empty to use the first rkt in $PATH. Only used if --container-runtime='rkt'. --root-dir string Directory path for managing kubelet files (volume mounts,etc). (default "/var/lib/kubelet") --runonce If true, exit after spawning pods from local manifests or remote urls. Exclusive with --api-servers, and --enable-server --runtime-cgroups string Optional absolute name of cgroups to create and run the runtime in. --runtime-request-timeout duration Timeout of all runtime requests except long running request - pull, logs, exec and attach. When timeout exceeded, kubelet will cancel the request, throw out an error and retry later. Default: 2m0s (default 2m0s) --seccomp-profile-root string Directory path for seccomp profiles. (default "/var/lib/kubelet/seccomp") --serialize-image-pulls Pull images one at a time. We recommend not changing the default value on nodes that run docker daemon with version < 1.9 or an Aufs storage backend. Issue #10959 has more details. [default=true] (default true) --stderrthreshold severity logs at or above this threshold go to stderr (default 2) --storage-driver-buffer-duration duration Writes in the storage driver will be buffered for this duration, and committed to the non memory backends as a single transaction (default 1m0s) --storage-driver-db string database name (default "cadvisor") --storage-driver-host string database host:port (default "localhost:8086") --storage-driver-password string database password (default "root") --storage-driver-secure use secure connection with database --storage-driver-table string table name (default "stats") --storage-driver-user string database username (default "root") --streaming-connection-idle-timeout duration Maximum time a streaming connection can be idle before the connection is automatically closed. 0 indicates no timeout. Example: '5m' (default 4h0m0s) --sync-frequency duration Max period between synchronizing running containers and config (default 1m0s) --system-cgroups / Optional absolute name of cgroups in which to place all non-kernel processes that are not already inside a cgroup under /. Empty for no container. Rolling back the flag requires a reboot. (Default: ""). --system-reserved mapStringString A set of ResourceName=ResourceQuantity (e.g. cpu=200m,memory=500Mi) pairs that describe resources reserved for non-kubernetes components. Currently only cpu and memory are supported. See http://kubernetes.io/docs/user-guide/compute-resources for more detail. [default=none] --system-reserved-cgroup string Absolute name of the top level cgroup that is used to manage non-kubernetes components for which compute resources were reserved via '--system-reserved' flag. Ex. '/system-reserved'. [default=''] --tls-cert-file string File containing x509 Certificate for HTTPS. (CA cert, if any, concatenated after server cert). If --tls-cert-file and --tls-private-key-file are not provided, a self-signed certificate and key are generated for the public address and saved to the directory passed to --cert-dir. --tls-private-key-file string File containing x509 private key matching --tls-cert-file. -v, --v Level log level for V logs --version version[=true] Print version information and quit --vmodule moduleSpec comma-separated list of pattern=N settings for file-filtered logging --volume-plugin-dir string The full path of the directory in which to search for additional third party volume plugins (default "/usr/libexec/kubernetes/kubelet-plugins/volume/exec/") --volume-stats-agg-period duration Specifies interval for kubelet to calculate and cache the volume disk usage for all pods and volumes. To disable volume calculations, set to 0. Default: '1m' (default 1m0s) Error: unknown flag: --config

cheld commented 7 years ago

Have you changed the Kubernetes version in build/hyperkube.sh ?

Unfortunately, it must stay 1.5.

cheld commented 7 years ago

Hmm... or maybe the env variable K8S_VERSION set to 1.6?

timothyjosefik commented 7 years ago

My K8S_Version was set to 1.6 as I was working on other stuff. Deleted all images and containers, reset my environment and the hypercube container dies with the log $nsenter: failed to execute ./hyperkube: No such file or directory

cheld commented 7 years ago

I think there is something wrong with your environment. Most likely you build your own container with missing binary. Attach to the container and check if the binary is inside. Hyperkube container is deprecated anyway.

You can use any kubernetes cluster for development. You can use minikube, kubeadm or similar to hyperkube container: https://github.com/Mirantis/kubeadm-dind-cluster

timothyjosefik commented 7 years ago

Can't exec/attach into the container since it stops automatically. I was able to use minikube and build/deploy the dashboard through that way. This shouldn't be an environment problem as the code uses google hyperkube container and that is what is not starting it doesn't build anything. https://github.com/kubernetes/dashboard/blob/e2a87f2c6c6cb6e9832a2d7343c55a3b0f1713f5/build/hyperkube.sh#L31

Since hyperkube is deprecated it should be removed from the code here and switched to something else.

I would normally just close this as I have found a solution (not using gulp local-up-cluster) but I am leaving it open for the team to decide whether or not this should be closed since it is an issue, or maybe open a new issue all together since the original problem was an environment setting.

cheld commented 7 years ago

I have one more idea. In the docker run command I merge the host file system with the container file system. Maybe this causes issues. Can you try this old version:

https://raw.githubusercontent.com/kubernetes/dashboard/0de08eca9451be1a94adfc8b33d7d1970bfecf77/build/hyperkube.sh

It creates k8s container without merge. In case this is the issue, please post name and version of your linux distro. Anything else special (like AppAmore or something)?

floreks commented 7 years ago

Operating system: Mac OS X 10.11.6

@cheld I think that this might be mac related issue as @timothyjosefik stated in first post that he uses one.

Since hyperkube is deprecated it should be removed from the code here and switched to something else.

I would normally just close this as I have found a solution (not using gulp local-up-cluster) but I am leaving it open for the team to decide whether or not this should be closed since it is an issue, or maybe open a new issue all together since the original problem was an environment setting.

We'll leave it open for now. Maybe @maciaszczykm could test this when he'll be back because I don't have mac :)

I can only confirm that it still works on Ubuntu 16.10. We'll migrate from hyperkube eventually. @cheld has done some investigation in this matter already.

cheld commented 7 years ago

Ahhh :o)

maciaszczykm commented 7 years ago

I have tested it and it is not working like @timothyjosefik pointed out. We will be moving away from hyperkube as it is already deprecated and we are using it only on our CI for tests. Currently I was not able to find quick fix.

maciaszczykm commented 7 years ago

I am going to close it, you can track our progress of moving to somethig what is working in #1710. There is no point for us to spend a lot of time on debugging deprecated tool, we will try to do it other way.