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MicroK8s is a small, fast, single-package Kubernetes for datacenters and the edge.
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Fail to enable kubeflow #2257

Closed jiasenwu closed 1 year ago

jiasenwu commented 3 years ago 
$ snap list
Name      Version          Rev    Tracking       Publisher   Notes
core      16-2.49.2        10958  latest/stable  canonical✓  core
core18    20210309         1997   latest/stable  canonical✓  base
juju      2.9.0            16132  latest/stable  canonical✓  classic
lxd       4.14             20371  latest/stable  canonical✓  -
microk8s  v1.22.0-alpha.1  2177   1.22/edge      canonical✓  classic
$ microk8s inspect
Inspecting Certificates
Inspecting services
  Service snap.microk8s.daemon-cluster-agent is running
  Service snap.microk8s.daemon-containerd is running
  Service snap.microk8s.daemon-apiserver-kicker is running
  Service snap.microk8s.daemon-kubelite is running
  Copy service arguments to the final report tarball
Inspecting AppArmor configuration
Gathering system information
  Copy processes list to the final report tarball
  Copy snap list to the final report tarball
  Copy VM name (or none) to the final report tarball
  Copy disk usage information to the final report tarball
  Copy memory usage information to the final report tarball
  Copy server uptime to the final report tarball
  Copy current linux distribution to the final report tarball
  Copy openSSL information to the final report tarball
  Copy network configuration to the final report tarball
Inspecting kubernetes cluster
  Inspect kubernetes cluster
Inspecting juju
  Inspect Juju
Inspecting kubeflow
  Inspect Kubeflow

Building the report tarball
  Report tarball is at /var/snap/microk8s/2177/inspection-report-20210511_115556.tar.gz
$ KUBEFLOW_DEBUG=true microk8s.enable kubeflow
+ microk8s-status.wrapper --wait-ready
....
+ microk8s-kubectl.wrapper wait --for=condition=available -nkube-system deployment/coredns deployment/hostpath-provisioner --timeout=10m
deployment.apps/coredns condition met
deployment.apps/hostpath-provisioner condition met

Addon setup complete. Checking connectivity...
Couldn't contact api.jujucharms.com
Please check your network connectivity before enabling Kubeflow.

I try to get more information from "Couldn't contact ...". It turns out to be an SSL error.

<urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)>

However, I find it totally fine to curl the url "https://api.jujucharms.com/charmstore/v5/~kubeflow-charmers/ambassador-88/icon.svg" on my host OS. I don't understand why there is a SSL error when enabling the kubeflow.

youngquan commented 3 years ago

I try to get more information from "Couldn't contact ...". It turns out to be an SSL error.

How do you get this information? I have the same problem.

jiasenwu commented 3 years ago

yeah, I had to hack the addons to inject a 'try.. catch..' block and print the exception there.

DomFleischmann commented 3 years ago

Can you give us a bit more context about the environment where you are running this?

jiasenwu commented 3 years ago 
$ snap version
snap     2.49.1-1
snapd    2.49.1-1
series   16
manjaro  -
kernel   5.10.30-1-MANJARO

I first tried microk8s v1.21, but it failed for some other reason (but I canoot recall now). So I switch to 1.22-alpha, and the k8s is deployed successfully. But I cannot enable the kubeflow.

Unfortunately, I have deleted my local Kubernetes, so will be hard to reproduce all details. Let me know if any other information I can provide.

youngquan commented 3 years ago

These are some information from my VM:

$ snap list
Name      Version   Rev    Tracking       Publisher   Notes
core      16-2.50   11081  latest/stable  canonical✓  core
core18    20210507  2066   latest/stable  canonical✓  base
microk8s  v1.20.7   2228   1.20/edge      canonical✓  classic
$ microk8s.inspect
Inspecting Certificates
Inspecting services
  Service snap.microk8s.daemon-cluster-agent is running
  Service snap.microk8s.daemon-containerd is running
  Service snap.microk8s.daemon-apiserver is running
  Service snap.microk8s.daemon-apiserver-kicker is running
  Service snap.microk8s.daemon-control-plane-kicker is running
  Service snap.microk8s.daemon-proxy is running
  Service snap.microk8s.daemon-kubelet is running
  Service snap.microk8s.daemon-scheduler is running
  Service snap.microk8s.daemon-controller-manager is running
  Copy service arguments to the final report tarball
Inspecting AppArmor configuration
Gathering system information
  Copy processes list to the final report tarball
  Copy snap list to the final report tarball
  Copy VM name (or none) to the final report tarball
  Copy disk usage information to the final report tarball
  Copy memory usage information to the final report tarball
  Copy server uptime to the final report tarball
  Copy current linux distribution to the final report tarball
  Copy openSSL information to the final report tarball
  Copy network configuration to the final report tarball
Inspecting kubernetes cluster
  Inspect kubernetes cluster
Inspecting juju
  Inspect Juju
Inspecting kubeflow
  Inspect Kubeflow

Building the report tarball
  Report tarball is at /var/snap/microk8s/2228/inspection-report-20210528_074433.tar.gz
$ curl -v https://api.jujucharms.com/charmstore/v5/~kubeflow-charmers/ambassador-88/icon.svg
* About to connect() to api.jujucharms.com port 443 (#0)
*   Trying 162.213.33.78...
* Connected to api.jujucharms.com (162.213.33.78) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate:
*       subject: CN=api.jujucharms.com
*       start date: Mar 15 06:50:43 2021 GMT
*       expire date: Jun 13 06:50:43 2021 GMT
*       common name: api.jujucharms.com
*       issuer: CN=R3,O=Let's Encrypt,C=US
> GET /charmstore/v5/~kubeflow-charmers/ambassador-88/icon.svg HTTP/1.1
> User-Agent: curl/7.29.0
> Host: api.jujucharms.com
> Accept: */*
> 
< HTTP/1.1 200 OK
< Date: Fri, 28 May 2021 07:49:00 GMT
< Server: Apache/2.4.29 (Ubuntu)
< Access-Control-Allow-Credentials: true
< Access-Control-Allow-Headers: Bakery-Protocol-Version, Macaroons, X-Requested-With
< Access-Control-Allow-Methods: DELETE,GET,HEAD,PUT,POST,OPTIONS
< Access-Control-Allow-Origin: *
< Access-Control-Cache-Max-Age: 600
< Access-Control-Expose-Headers: WWW-Authenticate
< Cache-Control: public, max-age=3600
< Content-Type: image/svg+xml
< Set-Cookie: SRVNAME=; Expires=Thu, 01-Jan-1970 00:00:01 GMT; path=/charmstore/
< Vary: Accept-Encoding
< Transfer-Encoding: chunked
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* Connection #0 to host api.jujucharms.com left intact
$ snap version
snap    2.50-1.el7
snapd   2.50-1.el7
series  16
centos  7
kernel  3.10.0-957.12.2.el7.x86_64

By the way, juju can not be installed successfully:

$ sudo  snap install  juju --classic
error: cannot perform the following tasks:
- Run hook connect-plug-peers of snap "juju" (run hook "connect-plug-peers": 
-----
error: error running snapctl: cannot perform the following tasks:
- Run service command "start" for services ["fetch-oci"] of snap "juju" ([start snap.juju.fetch-oci.service] failed with exit status 1: Job for snap.juju.fetch-oci.service failed because a timeout was exceeded. See "systemctl status snap.juju.fetch-oci.service" and "journalctl -xe" for details.
)
-----)
stale[bot] commented 1 year ago

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.