Jan Kaczkowski - FILM

How to create WebDAV on Red Hat 8.3

yum install httpd mod_dav apr-util-bdb policycoreutils-python-utils

htdigest -c /etc/httpd/users.password webdav user

vi /etc/httpd/conf.d/webdav.conf

DAVLockDB /var/lib/dav/lockdb

Alias /webdav /home/webdav

<Location /webdav>

    DAV On

    SSLRequireSSL

    Options None

    AuthType Digest

    AuthName webdav

    AuthUserFile /etc/httpd/users.password

    Require valid-user

</Location>

mkdir /home/webdav && chown apache:apache /home/webdav

chcon -R -t httpd_sys_rw_content_t /home/webdav

semanage fcontext -a -t httpd_sys_rw_content_t /home/webdav

firewall-cmd --add-service=https --permanent

firewall-cmd --reload

systemctl enable httpd

systemctl start httpd

OpenShift 3.11 local volume provisioner

Local volume provisioner from Quay.io in version 1.0.1 is not usable in OpenShift 3.11 due to API changes (required node affinity) while version 2+ simply doesn't recognize mount points properly.
There is a solution: local provisioner from Rancher Labs.
You just run: mkdir -p /opt/local-path-provisioner; kubectl apply -f https://raw.githubusercontent.com/rancher/local-path-provisioner/master/deploy/local-path-storage.yaml and you are done. If you set storageclass.kubernetes.io/is-default-class="true" pv claims with empty storage class will be handled by Rancher's local provisioner.

Sprzedam serwer

Sprzedam cichy low-endowy serwer złożony w firmie Znak:

Procesor AMD Athlon X4 620e (Energy Efficient), 4 rdzenie 800-2600 MHz, 45W

Płyta główna Gigabyte, AMD SB600/RS690

Obudowa Thermaltake Swing, Zasilacz Corsair 450W

6 GB RAM, Storage: 2 x 250 GB SATA HDD Seagate

Grafika Radeon X1250 (HDMI, DVI, VGA) + Radeon 4670 (HDMI, DVI, VGA)

System operacyjny CentOS 7.6

Keycloak i Spring Boot

CentOS 7.5 i OpenShift

[root@vger ~]# cat /etc/hosts | grep -v vger
[root@vger ~]# nslookup vger
Server:  10.0.100.11
Address: 10.0.100.11#53

Name: vger.dc1
Address: 10.0.100.9

[root@vger ~]# hostname
vger.dc1

[root@vger ~]# cat /etc/docker/daemon.json 
{
  "insecure-registries" : ["172.30.0.0/16"]
}
[root@vger ~]# cat /etc/sysconfig/docker-storage
DOCKER_STORAGE_OPTIONS="--storage-driver devicemapper "

[root@vger ~]# oc cluster up --public-hostname=vger.dc1 --routing-suffix=vger.dc1

Getting a Docker client ...
Checking if image openshift/origin-control-plane:v3.10 is available ...
Checking type of volume mount ...
Determining server IP ...
Checking if OpenShift is already running ...
Checking for supported Docker version (=>1.22) ...
Checking if insecured registry is configured properly in Docker ...
Checking if required ports are available ...
Checking if OpenShift client is configured properly ...
Checking if image openshift/origin-control-plane:v3.10 is available ...
Starting OpenShift using openshift/origin-control-plane:v3.10 ...
I1005 21:51:11.942799    5710 flags.go:30] Running "create-kubelet-flags"
I1005 21:51:22.454887    5710 run_kubelet.go:48] Running "start-kubelet"
I1005 21:51:27.032852    5710 run_self_hosted.go:172] Waiting for the kube-apiserver to be ready ...
I1005 21:52:22.045049    5710 interface.go:26] Installing "kube-proxy" ...
I1005 21:52:22.045121    5710 interface.go:26] Installing "kube-dns" ...
I1005 21:52:22.045154    5710 interface.go:26] Installing "openshift-apiserver" ...
I1005 21:52:22.045285    5710 apply_template.go:83] Installing "openshift-apiserver"
I1005 21:52:22.045307    5710 apply_template.go:83] Installing "kube-proxy"
I1005 21:52:22.045311    5710 apply_template.go:83] Installing "kube-dns"
I1005 21:54:12.417444    5710 interface.go:41] Finished installing "kube-proxy" "kube-dns" "openshift-apiserver"
I1005 21:54:54.701497    5710 run_self_hosted.go:224] openshift-apiserver available
I1005 21:54:54.701602    5710 interface.go:26] Installing "openshift-controller-manager" ...
I1005 21:54:54.701675    5710 apply_template.go:83] Installing "openshift-controller-manager"
I1005 21:55:10.621027    5710 interface.go:41] Finished installing "openshift-controller-manager"
Adding default OAuthClient redirect URIs ...
Adding sample-templates ...
Adding persistent-volumes ...
Adding web-console ...
Adding registry ...
Adding centos-imagestreams ...
Adding router ...
I1005 21:55:10.661454    5710 interface.go:26] Installing "sample-templates" ...
I1005 21:55:10.661498    5710 interface.go:26] Installing "persistent-volumes" ...
I1005 21:55:10.661516    5710 interface.go:26] Installing "openshift-web-console-operator" ...
I1005 21:55:10.661538    5710 interface.go:26] Installing "openshift-image-registry" ...
I1005 21:55:10.661554    5710 interface.go:26] Installing "centos-imagestreams" ...
I1005 21:55:10.661570    5710 interface.go:26] Installing "openshift-router" ...
I1005 21:55:10.662026    5710 apply_list.go:68] Installing "centos-imagestreams"
I1005 21:55:10.662337    5710 interface.go:26] Installing "sample-templates/postgresql" ...
I1005 21:55:10.662360    5710 interface.go:26] Installing "sample-templates/dancer quickstart" ...
I1005 21:55:10.662378    5710 interface.go:26] Installing "sample-templates/django quickstart" ...
I1005 21:55:10.662395    5710 interface.go:26] Installing "sample-templates/nodejs quickstart" ...
I1005 21:55:10.662412    5710 interface.go:26] Installing "sample-templates/rails quickstart" ...
I1005 21:55:10.662430    5710 interface.go:26] Installing "sample-templates/jenkins pipeline ephemeral" ...
I1005 21:55:10.662448    5710 interface.go:26] Installing "sample-templates/sample pipeline" ...
I1005 21:55:10.662463    5710 interface.go:26] Installing "sample-templates/mongodb" ...
I1005 21:55:10.662480    5710 interface.go:26] Installing "sample-templates/mariadb" ...
I1005 21:55:10.662495    5710 interface.go:26] Installing "sample-templates/mysql" ...
I1005 21:55:10.662510    5710 interface.go:26] Installing "sample-templates/cakephp quickstart" ...
I1005 21:55:10.662589    5710 apply_list.go:68] Installing "sample-templates/cakephp quickstart"
I1005 21:55:10.663004    5710 apply_list.go:68] Installing "sample-templates/postgresql"
I1005 21:55:10.663305    5710 apply_list.go:68] Installing "sample-templates/dancer quickstart"
I1005 21:55:10.663425    5710 apply_template.go:83] Installing "openshift-web-console-operator"
I1005 21:55:10.663593    5710 apply_list.go:68] Installing "sample-templates/django quickstart"
I1005 21:55:10.664252    5710 apply_list.go:68] Installing "sample-templates/nodejs quickstart"
I1005 21:55:10.664465    5710 apply_list.go:68] Installing "sample-templates/rails quickstart"
I1005 21:55:10.665384    5710 apply_list.go:68] Installing "sample-templates/mongodb"
I1005 21:55:10.666120    5710 apply_list.go:68] Installing "sample-templates/jenkins pipeline ephemeral"
I1005 21:55:10.666799    5710 apply_list.go:68] Installing "sample-templates/sample pipeline"
I1005 21:55:10.667865    5710 apply_list.go:68] Installing "sample-templates/mariadb"
I1005 21:55:10.668691    5710 apply_list.go:68] Installing "sample-templates/mysql"
I1005 21:57:27.162468    5710 interface.go:41] Finished installing "sample-templates/postgresql" "sample-templates/dancer quickstart" "sample-templates/django quickstart" "sample-templates/nodejs quickstart" "sample-templates/rails quickstart" "sample-templates/jenkins pipeline ephemeral" "sample-templates/sample pipeline" "sample-templates/mongodb" "sample-templates/mariadb" "sample-templates/mysql" "sample-templates/cakephp quickstart"
I1005 21:57:27.162561    5710 interface.go:41] Finished installing "sample-templates" "persistent-volumes" "openshift-web-console-operator" "openshift-image-registry" "centos-imagestreams" "openshift-router"
Server Information ...
OpenShift server started.

The server is accessible via web console at:
    https://vger.dc1:8443

[root@vger ~]# firewall-cmd --zone=public --permanent --add-port=8443/tcp

Trzeba mieć poprawnie skonfigurowane DNSy!

How Alibaba analyzes production problems

https://github.com/alibaba/arthas