I have CoreOS stable v1122.2.0 installed.
I have etcd2 configured with tls and is working properly. i created the certificates based on https://github.com/coreos/etcd/tree/master/hack/tls-setup using sub-domains that I created for my servers instead of specific IP address for calico tls to work.
etcd2 and calcio-node are configured and work properly. now I want to configure Kubernetes. I used the instructions at https://coreos.com/kubernetes/docs/latest/deploy-master.html, for now I'm configuring only one coreos server.
when I start kubelet and execute journalctl -f -u kubelet I get the following messages:
Sep 23 23:30:11 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:11.495381 1473 reflector.go:205] pkg/kubelet/kubelet.go:286: Failed to list *api.Node: Get http://127.0.0.1:8080/api/v1/nodes?fieldSelector=metadata.name%3Dcoreos-2.tux-in.com&resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:11 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:11.889187 1473 reflector.go:205] pkg/kubelet/kubelet.go:267: Failed to list *api.Service: Get http://127.0.0.1:8080/api/v1/services?resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:12 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:12.292061 1473 reflector.go:205] pkg/kubelet/config/apiserver.go:43: Failed to list *api.Pod: Get http://127.0.0.1:8080/api/v1/pods?fieldSelector=spec.nodeName%3Dcoreos-2.tux-in.com&resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:12 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:12.307222 1473 event.go:207] Unable to write event: 'Post http://127.0.0.1:8080/api/v1/namespaces/default/events: dial tcp 127.0.0.1:8080: getsockopt: connection refused' (may retry after sleeping)
Sep 23 23:30:12 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:12.495982 1473 reflector.go:205] pkg/kubelet/kubelet.go:286: Failed to list *api.Node: Get http://127.0.0.1:8080/api/v1/nodes?fieldSelector=metadata.name%3Dcoreos-2.tux-in.com&resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:12 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:12.889756 1473 reflector.go:205] pkg/kubelet/kubelet.go:267: Failed to list *api.Service: Get http://127.0.0.1:8080/api/v1/services?resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:13 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:13.292671 1473 reflector.go:205] pkg/kubelet/config/apiserver.go:43: Failed to list *api.Pod: Get http://127.0.0.1:8080/api/v1/pods?fieldSelector=spec.nodeName%3Dcoreos-2.tux-in.com&resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:13 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:13.496732 1473 reflector.go:205] pkg/kubelet/kubelet.go:286: Failed to list *api.Node: Get http://127.0.0.1:8080/api/v1/nodes?fieldSelector=metadata.name%3Dcoreos-2.tux-in.com&resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:13 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:13.589335 1473 kubelet.go:1938] Failed creating a mirror pod for "kube-apiserver-coreos-2.tux-in.com_kube-system(9b41319800532574b4c4ac760c920bee)": Post http://127.0.0.1:8080/api/v1/namespaces/kube-system/pods: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:13 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:13.890294 1473 reflector.go:205] pkg/kubelet/kubelet.go:267: Failed to list *api.Service: Get http://127.0.0.1:8080/api/v1/services?resourceVersion=0: dial tcp 127.0.0.1:8080: getsockopt: connection refused
Sep 23 23:30:13 coreos-2.tux-in.com kubelet-wrapper[1473]: I0923 23:30:13.979257 1473 docker_manager.go:2289] checking backoff for container "kube-apiserver" in pod "kube-apiserver-coreos-2.tux-in.com"
Sep 23 23:30:13 coreos-2.tux-in.com kubelet-wrapper[1473]: I0923 23:30:13.980071 1473 docker_manager.go:2303] Back-off 2m40s restarting failed container=kube-apiserver pod=kube-apiserver-coreos-2.tux-in.com_kube-system(9b41319800532574b4c4ac760c920bee)
Sep 23 23:30:13 coreos-2.tux-in.com kubelet-wrapper[1473]: E0923 23:30:13.980144 1473 pod_workers.go:183] Error syncing pod 9b41319800532574b4c4ac760c920bee, skipping: failed to "StartContainer" for "kube-apiserver" with CrashLoopBackOff: "Back-off 2m40s restarting failed container=kube-apiserver pod=kube-apiserver-coreos-2.tux-in.com_kube-system(9b41319800532574b4c4ac760c920bee)"
this is my /var/lib/coreos-install/user_data file:
#cloud-config
hostname: "coreos-2.tux-in.com"
write_files:
- path: "/etc/ssl/etcd/ca.pem"
permissions: "0666"
owner: "etcd:etcd"
content: |
...
- path: "/etc/ssl/etcd/etcd1.pem"
permissions: "0666"
owner: "etcd:etcd"
content: |
...
- path: "/etc/ssl/etcd/etcd1-key.pem"
permissions: "0666"
owner: "etcd:etcd"
content: |
...
- path: "/etc/kubernetes/ssl/ca.pem"
permissions: "0600"
owner: "root:root"
content: |
...
- path: "/etc/kubernetes/ssl/apiserver.pem"
permissions: "0600"
owner: "root:root"
content: |
...
- path: "/etc/kubernetes/ssl/apiserver-key.pem"
permissions: "0600"
owner: "root:root"
content: |
...
- path: "/etc/kubernetes/cni/net.d/10-calico.conf"
content: |
{
"name": "calico",
"type": "flannel",
"delegate": {
"type": "calico",
"etcd_endpoints": "https://coreos-2.tux-in.com:2379",
"log_level": "none",
"log_level_stderr": "info",
"hostname": "coreos-2.tux-in.com",
"policy": {
"type": "k8s",
"k8s_api_root": "http://127.0.0.1:8080/api/v1/"
}
}
}
- path: "/etc/kubernetes/manifests/policy-controller.yaml"
content: |
apiVersion: v1
kind: Pod
metadata:
name: calico-policy-controller
namespace: calico-system
spec:
hostNetwork: true
containers:
# The Calico policy controller.
- name: k8s-policy-controller
image: calico/kube-policy-controller:v0.2.0
env:
- name: ETCD_ENDPOINTS
value: "https://coreos-2.tux-in.com:2379"
- name: K8S_API
value: "http://127.0.0.1:8080"
- name: LEADER_ELECTION
value: "true"
# Leader election container used by the policy controller.
- name: leader-elector
image: quay.io/calico/leader-elector:v0.1.0
imagePullPolicy: IfNotPresent
args:
- "--election=calico-policy-election"
- "--election-namespace=calico-system"
- "--http=127.0.0.1:4040"
- path: "/etc/kubernetes/manifests/kube-scheduler.yaml"
content: |
apiVersion: v1
kind: Pod
metadata:
name: kube-scheduler
namespace: kube-system
spec:
hostNetwork: true
containers:
- name: kube-scheduler
image: quay.io/coreos/hyperkube:v1.3.6_coreos.0
command:
- /hyperkube
- scheduler
- --master=http://127.0.0.1:8080
- --leader-elect=true
livenessProbe:
httpGet:
host: 127.0.0.1
path: /healthz
port: 10251
initialDelaySeconds: 15
timeoutSeconds: 1
- path: "/etc/kubernetes/manifests/kube-controller-manager.yaml"
content: |
apiVersion: v1
kind: Pod
metadata:
name: kube-controller-manager
namespace: kube-system
spec:
hostNetwork: true
containers:
- name: kube-controller-manager
image: quay.io/coreos/hyperkube:v1.3.6_coreos.0
command:
- /hyperkube
- controller-manager
- --master=http://127.0.0.1:8080
- --leader-elect=true
- --service-account-private-key-file=/etc/kubernetes/ssl/apiserver-key.pem
- --root-ca-file=/etc/kubernetes/ssl/ca.pem
livenessProbe:
httpGet:
host: 127.0.0.1
path: /healthz
port: 10252
initialDelaySeconds: 15
timeoutSeconds: 1
volumeMounts:
- mountPath: /etc/kubernetes/ssl
name: ssl-certs-kubernetes
readOnly: true
- mountPath: /etc/ssl/certs
name: ssl-certs-host
readOnly: true
volumes:
- hostPath:
path: /etc/kubernetes/ssl
name: ssl-certs-kubernetes
- hostPath:
path: /usr/share/ca-certificates
name: ssl-certs-host
- path: "/etc/kubernetes/manifests/kube-proxy.yaml"
content: |
apiVersion: v1
kind: Pod
metadata:
name: kube-proxy
namespace: kube-system
spec:
hostNetwork: true
containers:
- name: kube-proxy
image: quay.io/coreos/hyperkube:v1.3.6_coreos.0
command:
- /hyperkube
- proxy
- --master=http://127.0.0.1:8080
- --proxy-mode=iptables
securityContext:
privileged: true
volumeMounts:
- mountPath: /etc/ssl/certs
name: ssl-certs-host
readOnly: true
volumes:
- hostPath:
path: /usr/share/ca-certificates
name: ssl-certs-host
- path: "/etc/kubernetes/manifests/kube-apiserver.yaml"
content: |
apiVersion: v1
kind: Pod
metadata:
name: kube-apiserver
namespace: kube-system
spec:
hostNetwork: true
containers:
- name: kube-apiserver
image: quay.io/coreos/hyperkube:v1.3.6_coreos.0
command:
- /hyperkube
- apiserver
- --bind-address=0.0.0.0
- --etcd-servers=https://coreos-2.tux-in.com:2379
- --allow-privileged=true
- --service-cluster-ip-range=10.0.0.0/24
- --secure-port=443
- --advertise-address=coreos-2.tux-in.com
- --admission-control=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota
- --tls-cert-file=/etc/kubernetes/ssl/apiserver.pem
- --tls-private-key-file=/etc/kubernetes/ssl/apiserver-key.pem
- --client-ca-file=/etc/kubernetes/ssl/ca.pem
- --service-account-key-file=/etc/kubernetes/ssl/apiserver-key.pem
- --runtime-config=extensions/v1beta1=true,extensions/v1beta1/networkpolicies=true
ports:
- containerPort: 443
hostPort: 443
name: https
- containerPort: 8080
hostPort: 8080
name: local
volumeMounts:
- mountPath: /etc/kubernetes/ssl
name: ssl-certs-kubernetes
readOnly: true
- mountPath: /etc/ssl/certs
name: ssl-certs-host
readOnly: true
volumes:
- hostPath:
path: /etc/kubernetes/ssl
name: ssl-certs-kubernetes
- hostPath:
path: /usr/share/ca-certificates
name: ssl-certs-host
ssh_authorized_keys:
- ...
coreos:
etcd2:
# generate a new token for each unique cluster from https://discovery.etcd.io/new?size=3
# specify the initial size of your cluster with ?size=X
discovery: ...
advertise-client-urls: https://coreos-2.tux-in.com:2379,https://coreos-2.tux-in.com:4001
initial-advertise-peer-urls: https://coreos-2.tux-in.com:2380
# listen on both the official ports and the legacy ports
# legacy ports can be omitted if your application doesn't depend on them
listen-client-urls: https://0.0.0.0:2379,https://0.0.0.0:4001
listen-peer-urls: https://coreos-2.tux-in.com:2380
flannel:
etcd_endpoints: "https://coreos-2.tux-in.com:2379"
etcd_cafile: /etc/ssl/etcd/ca.pem
etcd_certfile: /etc/ssl/etcd/etcd1.pem
etcd_keyfile: /etc/ssl/etcd/etcd1-key.pem
update:
reboot-strategy: etcd-lock
units:
- name: 00-enp4s0.network
runtime: true
content: |
[Match]
Name=enp4s0
[Network]
Address=10.79.218.2/24
Gateway=10.79.218.232
DNS=8.8.8.8
- name: var-lib-rkt.mount
enable: true
command: start
content: |
[Mount]
What=/dev/disk/by-uuid/daca9515-5040-4f1d-ac0b-b69de3b91343
Where=/var/lib/rkt
Type=btrfs
Options=loop,discard
- name: etcd2.service
command: start
drop-ins:
- name: 30-certs.conf
content: |
[Service]
Environment="ETCD_CERT_FILE=/etc/ssl/etcd/etcd1.pem"
Environment="ETCD_KEY_FILE=/etc/ssl/etcd/etcd1-key.pem"
Environment="ETCD_TRUSTED_CA_FILE=/etc/ssl/etcd/ca.pem"
Environment="ETCD_CLIENT_CERT_AUTH=true"
Environment="ETCD_PEER_CERT_FILE=/etc/ssl/etcd/etcd1.pem"
Environment="ETCD_PEER_KEY_FILE=/etc/ssl/etcd/etcd1-key.pem"
Environment="ETCD_PEER_TRUSTED_CA_FILE=/etc/ssl/etcd/ca.pem"
Environment="ETCD_PEER_CLIENT_CERT_AUTH=true"
- name: flanneld.service
command: start
drop-ins:
- name: 50-network-config.conf
content: |
[Service]
ExecStartPre=/usr/bin/etcdctl --ca-file=/etc/ssl/etcd/ca.pem --cert-file=/etc/ssl/etcd/etcd1.pem --key-file=/etc/ssl/etcd/etcd1-key.pem --endpoint=https://coreos-2.tux-in.com:2379 set /coreos.com/network/config '{"Network":"10.1.0.0/16", "Backend": {"Type": "vxlan"}}'
- name: calico-node.service
command: start
content: |
[Unit]
Description=Calico per-host agent
Requires=network-online.target
After=network-online.target
[Service]
Slice=machine.slice
Environment=CALICO_DISABLE_FILE_LOGGING=true
Environment=HOSTNAME=coreos-2.tux-in.com
Environment=IP=10.79.218.2
Environment=FELIX_FELIXHOSTNAME=coreos-2.tux-in.com
Environment=CALICO_NETWORKING=false
Environment=NO_DEFAULT_POOLS=true
Environment=ETCD_ENDPOINTS=https://coreos-2.tux-in.com:2379
Environment=ETCD_AUTHORITY=coreos-2.tux-in.com:2379
Environment=ETCD_SCHEME=https
Environment=ETCD_CA_CERT_FILE=/etc/ssl/etcd/ca.pem
Environment=ETCD_CERT_FILE=/etc/ssl/etcd/etcd1.pem
Environment=ETCD_KEY_FILE=/etc/ssl/etcd/etcd1-key.pem
ExecStart=/usr/bin/rkt run --volume=resolv-conf,kind=host,source=/etc/resolv.conf,readOnly=true \
--volume=etcd-tls-certs,kind=host,source=/etc/ssl/etcd,readOnly=true --inherit-env --stage1-from-dir=stage1-fly.aci \
--volume=modules,kind=host,source=/lib/modules,readOnly=false \
--mount=volume=modules,target=/lib/modules \
--trust-keys-from-https quay.io/calico/node:v0.19.0 \
--mount=volume=etcd-tls-certs,target=/etc/ssl/etcd \
--mount=volume=resolv-conf,target=/etc/resolv.conf
KillMode=mixed
Restart=always
TimeoutStartSec=0
[Install]
WantedBy=multi-user.target
- name: kubelet.service
command: start
content: |
[Service]
ExecStartPre=/usr/bin/mkdir -p /etc/kubernetes/manifests
ExecStartPre=/usr/bin/mkdir -p /var/log/containers
Environment=KUBELET_VERSION=v1.3.7_coreos.0
Environment="RKT_OPTS=--volume var-log,kind=host,source=/var/log \
--mount volume=var-log,target=/var/log \
--volume dns,kind=host,source=/etc/resolv.conf \
--mount volume=dns,target=/etc/resolv.conf"
ExecStart=/usr/lib/coreos/kubelet-wrapper \
--api-servers=http://127.0.0.1:8080 \
--network-plugin-dir=/etc/kubernetes/cni/net.d \
--network-plugin=cni \
--register-schedulable=false \
--allow-privileged=true \
--config=/etc/kubernetes/manifests \
--hostname-override=coreos-2.tux-in.com \
--cluster-dns=8.8.8.8 \
--cluster-domain=tux-in.com
Restart=always
RestartSec=10
[Install]
WantedBy=multi-user.target
is 127.0.0.1:8080 should be opened by the kubelet-apiserver ? what am I missing here?
thanks!
