[root@vms91 ~]# cat /etc/etcd/etcd.conf
ETCD_DATA_DIR="/var/lib/etcd/cluster.etcd"
ETCD_LISTEN_PEER_URLS="http://192.168.135.91:2380,http://localhost:2380"
ETCD_LISTEN_CLIENT_URLS="http://192.168.135.91:2379,http://localhost:2379"
ETCD_NAME="etcd-91"
ETCD_INITIAL_ADVERTISE_PEER_URLS="http://192.168.135.91:2380"
ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379,http://192.168.135.91:2379"
ETCD_INITIAL_CLUSTER="etcd-91=http://192.168.135.91:2380,etcd-92=http://192.168.135.92:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

[root@vms91 ~]# cat /etc/sysconfig/docker
# /etc/sysconfig/docker
# Modify these options if you want to change the way the docker daemon runs
OPTIONS='--selinux-enabled --log-driver=journald --signature-verification=false --cluster-store=etcd://192.168.135.91:2379'
if [ -z "${DOCKER_CERT_PATH}" ]; then
    DOCKER_CERT_PATH=/etc/docker
fi
# Do not add registries in this file anymore. Use /etc/containers/registries.conf
# instead. For more information reference the registries.conf(5) man page.
# Location used for temporary files, such as those created by
# docker load and build operations. Default is /var/lib/docker/tmp
# Can be overriden by setting the following environment variable.
# DOCKER_TMPDIR=/var/tmp
# Controls the /etc/cron.daily/docker-logrotate cron job status.
# To disable, uncomment the line below.
# LOGROTATE=false
# docker-latest daemon can be used by starting the docker-latest unitfile.
# To use docker-latest client, uncomment below lines
#DOCKERBINARY=/usr/bin/docker-latest
#DOCKERDBINARY=/usr/bin/dockerd-latest
#DOCKER_CONTAINERD_BINARY=/usr/bin/docker-containerd-latest
#DOCKER_CONTAINERD_SHIM_BINARY=/usr/bin/docker-containerd-shim-latest

[root@vms91 ~]# mkdir /etc/calico
[root@vms91 ~]# vi /etc/calico/calicoctl.cfg
apiVersion: v1
kind: calicoApiConfig
metadata:
spec:
  datastoreType: "etcdv2"
  etcdEndpoints: "http://192.168.135.91:2379"

[root@vms91 ~]# calicoctl node run --node-image=quay.io/calico/node:v2.6.12 -c /etc/calico/calicoctl.cfg
Running command to load modules: modprobe -a xt_set ip6_tables
Enabling IPv4 forwarding
Enabling IPv6 forwarding
Increasing conntrack limit
Removing old calico-node container (if running).
Running the following command to start calico-node:
docker run --net=host --privileged --name=calico-node -d --restart=always -e NODENAME=vms91 -e CALICO_NETWORKING_BACKEND=bird -e CALICO_LIBNETWORK_ENABLED=true -e ETCD_ENDPOINTS=http://192.168.135.91:2379 -v /var/log/calico:/var/log/calico -v /var/run/calico:/var/run/calico -v /lib/modules:/lib/modules -v /run:/run -v /run/docker/plugins:/run/docker/plugins -v /var/run/docker.sock:/var/run/docker.sock quay.io/calico/node:v2.6.12
Image may take a short time to download if it is not available locally.
Container started, checking progress logs.
2020-10-03 06:21:08.577 [INFO][8] startup.go 173: Early log level set to info
2020-10-03 06:21:08.577 [INFO][8] client.go 202: Loading config from environment
2020-10-03 06:21:08.578 [INFO][8] startup.go 83: Skipping datastore connection test
2020-10-03 06:21:08.593 [INFO][8] startup.go 259: Building new node resource Name="vms91"
2020-10-03 06:21:08.593 [INFO][8] startup.go 273: Initialise BGP data
2020-10-03 06:21:08.594 [INFO][8] startup.go 467: Using autodetected IPv4 address on interface ens32: 192.168.135.91/24
2020-10-03 06:21:08.594 [INFO][8] startup.go 338: Node IPv4 changed, will check for conflicts
2020-10-03 06:21:08.601 [INFO][8] etcd.go 430: Error enumerating host directories error=100: Key not found (/calico) [7]
2020-10-03 06:21:08.601 [INFO][8] startup.go 530: No AS number configured on node resource, using global value
2020-10-03 06:21:08.604 [INFO][8] etcd.go 105: Ready flag is now set
2020-10-03 06:21:08.608 [INFO][8] client.go 133: Assigned cluster GUID ClusterGUID="59666997aef64507a55ba1aa69ae14d8"
2020-10-03 06:21:08.629 [INFO][8] startup.go 419: CALICO_IPV4POOL_NAT_OUTGOING is true (defaulted) through environment variable
2020-10-03 06:21:08.629 [INFO][8] startup.go 659: Ensure default IPv4 pool is created. IPIP mode: off
2020-10-03 06:21:08.634 [INFO][8] startup.go 670: Created default IPv4 pool (192.168.0.0/16) with NAT outgoing true. IPIP mode: off
2020-10-03 06:21:08.634 [INFO][8] startup.go 419: FELIX_IPV6SUPPORT is true (defaulted) through environment variable
2020-10-03 06:21:08.634 [INFO][8] startup.go 626: IPv6 supported on this platform: true
2020-10-03 06:21:08.634 [INFO][8] startup.go 419: CALICO_IPV6POOL_NAT_OUTGOING is false (defaulted) through environment variable
2020-10-03 06:21:08.634 [INFO][8] startup.go 659: Ensure default IPv6 pool is created. IPIP mode: off
2020-10-03 06:21:08.637 [INFO][8] startup.go 670: Created default IPv6 pool (fd80:24e2:f998:72d6::/64) with NAT outgoing false. IPIP mode: off
2020-10-03 06:21:08.683 [INFO][8] startup.go 131: Using node name: vms91
2020-10-03 06:21:08.775 [INFO][13] client.go 202: Loading config from environment
Starting libnetwork service
Calico node started successfully
[root@vms91 ~]# docker ps
CONTAINER ID        IMAGE                         COMMAND             CREATED              STATUS              PORTS               NAMES
ffcd376cda40        quay.io/calico/node:v2.6.12   "start_runit"       About a minute ago   Up About a minute                       calico-node

[root@vms91 ~]# docker network create --driver calico --ipam-driver calico-ipam calnet1
ba5794c56fb0a00de3b50b9b4ddaafa0984fa7936f9c4e9c790acdceb5a78632
[root@vms91 ~]# docker network list
NETWORK ID          NAME                DRIVER              SCOPE
cc525016a37d        bridge              bridge              local
ba5794c56fb0        calnet1             calico              global
af5df4b4da48        host                host                local
17e9381c6de0        none                null                local