Latest revision as of 14:17, 21 August 2019

Dica: Caso você não tenha acesso ao repositório na internet, veja o artigo Kubernetes: Instalação Offline ou Instalação usando repositórios privados

Docker

Instalando o Docker

1) Criar arquivo /etc/yum.repos.d/docker-ce.repo, com o conteúdo:

[docker-ce]
name=Docker CE Stable - $basearch
baseurl=https://download.docker.com/linux/centos/7/$basearch/stable
#baseurl=http://repomirror.company.com/docker-mirror/linux/centos/7/$basearch/stable/
enabled=1
gpgcheck=1
gpgkey=https://download.docker.com/linux/centos/gpg
#gpgkey=http://repomirror.company.com/docker-mirror/linux/centos/gpg

2) Instalando os pacotes no CentOS

yum install -y docker-ce-18.06.3

3) Remover o arquivoo

/etc/yum.repos.d/docker-ce.repo

Configuração pós-instalação

1) Tuning do SO

sysctl -a | grep may_detach_mounts

Se o valor for diferente de "fs.may_detach_mounts = 1", ajustar:

echo 1 > /proc/sys/fs/may_detach_mounts
echo fs.may_detach_mounts=1 > /usr/lib/sysctl.d/99-docker.conf

3) Editar o arquivo /etc/docker/daemon.json e configurar o devicemapper storage driver.

Importante: No meu caso precisava utilizar um repositório interno, então adicionei a variável insecure-registries.

mkdir -p /etc/docker
 
cat <<EOF >> /etc/docker/daemon.json
{
    "bip": "1.1.1.1/16",
    "insecure-registries": ["repomirror.company.com:5001"],
    "storage-driver": "devicemapper",
    "storage-opts": [
        "dm.thinpooldev=/dev/mapper/dockerVg-thinpoolLv",
        "dm.use_deferred_removal=true",
        "dm.use_deferred_deletion=true"
    ]
}
EOF

4) Start o Docker

systemctl start docker

5) Verificando as configurações

docker info

6) Se tudo estiver correto ajustar para iniciar automaticamente

systemctl enable docker

Verificando problemas

Inspecionando os logs do docker:

journalctl -ul docker

Kubernetes

Instalando o Kubernetes

1) Criar arquivo /etc/yum.repos.d/kubernetes.repo, com o conteúdo:

[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kube*

2) Instalando os pacotes no CentOS

yum install -y kubelet-1.11.9 kubeadm-1.11.9 kubectl-1.11.9

3) Remover o arquivoo

/etc/yum.repos.d/kubernetes.repo

3) Configuração do Cluster Kubernetes

Kubernetes: Configuração do Cluster Kubernetes Standard

Kubernetes: Configuração do Cluster Kubernetes com Alta Disponibilidade

Ver também

@@ Line 102: / Line 102: @@
   /etc/yum.repos.d/kubernetes.repo
-== Create a kubeadm-config.yaml ==
+) Configuração do Cluster Kubernetes
-Criar arquivo kubeadm-config.yaml, com o conteúdo:
+* [[Kubernetes: Configuração do Cluster Kubernetes Standard]]
- <nowiki>apiVersion: kubeadm.k8s.io/v1alpha2
+* [[Kubernetes: Configuração do Cluster Kubernetes com Alta Disponibilidade]]
-kind: MasterConfiguration
-apiServerExtraArgs:
-  enable-admission-plugins: PodSecurityPolicy
-kubernetesVersion: v1.11.9
-networking:
-    # This CIDR is a Calico default. Substitute or remove for your CNI provider.
-    podSubnet: "192.168.0.0/16"
-</nowiki>
-Initialize the master.
- kubeadm init --config=kubeadm-config.yaml
-To make kubectl work,
- mkdir -p $HOME/.kube
- cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
- chown $(id -u):$(id -g) $HOME/.kube/config
-Anote a mensagem com o token para adicionar os demais nodes
- kubeadm join --token token master-ip:master-port --discovery-token-ca-cert-hash sha256:hash
-== For HCL Component pack ==
-If you enabled the PodSecurityPolicy admission plugin in step 6, then you need to download the Component Pack installation zip to the master node, extract the file privileged-psp-with-rbac.yaml and apply it so that system pods are able to start in the kube-system namespace:
- unzip -p IC-ComponentPack-6.0.0.8.zip
- cd microservices_connections/hybridcloud/support/psp/
-To allow system pods to start in the kube-system namespace, apply the yaml file:
- kubectl apply -f privileged-psp-with-rbac.yaml
-== Instalar o Calico Network ==
- <small><nowiki>
-kubectl apply -f https://docs.projectcalico.org/v3.3/getting-started/kubernetes/installation/hosted/rbac-kdd.yaml
-kubectl apply -f https://docs.projectcalico.org/v3.3/getting-started/kubernetes/installation/hosted/kubernetes-datastore/calico-networking/1.7/calico.yaml</nowiki></small>
-== Adicionar os demais nodes ==
-Execute o comando com o token para adicionar os demais nodes
- kubeadm join --token token master-ip:master-port --discovery-token-ca-cert-hash sha256:hash
 = Ver também =