Second LIfe

[ERROR Swap]: running with swap on is not supported. Please disable swap
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`

swapoff -a && sed -i '/swap/d' /etc/fstab

KUBELET_POD_INFRA_CONTAINER="--pod-infra-containerimage=registry.access.redhat.com/rhel7/pod-infrastructure:latest"

in /etc/kubernetes/kubelet

이렇게 하던가 아니면 해당 이미지를 pull로 받아서 각 node에 docker load < 해주면 된다

[root@kiwitest01 kubernetes]# kubectl apply -f weave-daemonset.yaml
serviceaccount "weave-net" configured
The DaemonSet "weave-net" is invalid:
* spec.template.spec.containers[0].securityContext.privileged: Forbidden: disallowed by policy
* spec.template.spec.containers[1].securityContext.privileged: Forbidden: disallowed by policy

MASTER

/etc/kubernetes/config

KUBE_ALLOW_PRIV="--allow-privileged=false" 해당 부분을 true로 바꾼다

데몬 재시작

for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler kube-proxy docker flanneld; do

systemctl restart $SERVICES;

done

SLAVE

/etc/kubernetes/config

KUBE_ALLOW_PRIV="--allow-privileged=false" 해당 부분을 true로 바꾼다

for SERVICES in kube-proxy kubelet flanneld docker; do

systemctl restart $SERVICES;

done

[root@kiwitest01 run]# systemctl start docker

Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

[root@kiwitest01 run]# systemctl status docker

● docker.service - Docker Application Container Engine

   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)

  Drop-In: /usr/lib/systemd/system/docker.service.d

           └─flannel.conf

   Active: failed (Result: exit-code) since Fri 2018-05-25 12:32:54 KST; 7s ago

     Docs: http://docs.docker.com

  Process: 9813 ExecStart=/usr/bin/dockerd-current --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current --default-runtime=docker-runc --authorization-plugin=rhel-push-plugin --exec-opt native.cgroupdriver=systemd --userland-proxy-path=/usr/libexec/docker/docker-proxy-current $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES (code=exited, status=1/FAILURE)

 Main PID: 9813 (code=exited, status=1/FAILURE)

   Memory: 8.0K

   CGroup: /system.slice/docker.service

docker: Error response from daemon: Unknown runtime specified nvidia.

sudo pkill -SIGHUP dockerd

sudo docker run --privileged --runtime=nvidia -p 8080:8080 -p 8088:8088 -p 9191:9191 -p 9292:9292 -v /home/dkadmin/gpudb/persist:/opt/gpudb/persist kinetica/kinetica-cuda91:latest

kubectl get pods --namespace=kube-system

kubectl describe pods --namespace=kube-system

#kubectl proxy

$kubectl create -f mysql-deplyoment.yaml

에러가 서버에 연결할수 없다는 등에 에러가 나온다면

현재 설치된 minikube start  --kubernetes-version="v1.6.4"  --insecure-registry="dockertest2.io:12000"  요렇게 

1.6.4인데 kubectl 이 아마도 1.10일것이다.. 버젼에 맞게 다운받아야 한다

$ curl -O https://storage.googleapis.com/kubernetes-release/release/v1.6.4/bin/linux/amd64/kubectl

[root@hadoopm KUBE]# kubectl create -f mysql-deployment.yaml

service "wordpress-mysql" created

Error from server (BadRequest): error when creating "mysql-deployment.yaml": Deployment in version "v1beta2" cannot be handled as a Deployment: no kind "Deployment" is registered for version "apps/v1beta2"

skipping unreadable repository '/etc/yum.repos.d/CentOS-Vault.repo'

Skipping unreadable repository '/etc/yum.repos.d/CentOS-fasttrack.repo'

Loading mirror speeds from cached hostfile

Resolving Dependencies

--> Running transaction check

---> Package openssl.x86_64 1:1.0.2k-8.el7 will be installed

--> Processing Dependency: make for package: 1:openssl-1.0.2k-8.el7.x86_64

--> Running transaction check

---> Package make.x86_64 1:3.82-23.el7 will be installed

[Errno 12] Cannot allocate memory: '//var/lib/yum/rpmdb-indexes/version.tmp'

# yum clean all
# rm -f /var/lib/rpm/__db*
# rpm --rebuilddb

UNIX / Linux Postfix Control Program

The postfix command controls the operation of the Postfix mail system: start or stop the master daemon, do a health check, and other maintenance.

Task: Stop Postfix

Type the following command:
# postfix stop

Task: Start Postfix

Type the following command:
# postfix start

Task: Restart Postfix

Type the following command:
# postfix stop && postfix start

Task: Reload Postfix

To re-read configuration files, enter:
# postfix reload
The following distribution specific commands can be used too.

Debain / Ubuntu Linux Postfix Start / Stop / Restart Command

Type the following commands:
$ sudo /etc/init.d/postfix start
$ sudo /etc/init.d/postfix stop
$ sudo /etc/init.d/postfix restart
OR
$ sudo service postfix start
$ sudo service postfix stop
$ sudo service postfix restart

RHEL / CentOS / Fedora Linux Postfix Start / Stop / Restart Command

# /sbin/service postfix start
# /sbin/service postfix stop
# /sbin/service postfix restart