Code vs data
Attributes
Node Object
Ohai
Precedence
Files vs Templates
ERB Syntax
vs
one cookbook
dev
stage
prod
different
envionments
different
platforms
centos
ubuntu
bsd
vs
Create generic cookbooks which can be
shared
reused
save tonnes of time
attribute files
recipes
environments
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ohai
attributes
node1
node2
noden
node1.json
node2.json
noden.json
attr
run_list
attr
run_list
attr
run_list
Chef Server
{
"name": "ws.codespaces.io",
"normal": {
"tags": [
]
},
"automatic": {
"languages": {
"python": {
"version": "2.7.6",
"builddate": "Oct 26 2016, 20:30:19"
},
"nodejs": {
"version": "0.10.48"
},
"perl": {
"version": "5.18.2",
"archname": "x86_64-linux-gnu-thread-multi"
},
"ruby": {
"platform": "x86_64-linux",
"version": "2.3.1",
"release_date": "2016-04-26",
"target": "x86_64-pc-linux-gnu",
"target_cpu": "x86_64",
"target_vendor": "pc",
"target_os": "linux",
"host": "x86_64-pc-linux-gnu",
"host_cpu": "x86_64",
"host_os": "linux-gnu",
"host_vendor": "pc",
"bin_dir": "/opt/chefdk/embedded/bin",
"ruby_bin": "/opt/chefdk/embedded/bin/ruby",
"gems_dir": "/opt/chefdk/embedded/lib/ruby/gems/2.3.0",
"gem_bin": "/opt/chefdk/embedded/bin/gem"
},
"c": {
"gcc": {
"version": "4.8.4",
"description": "gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3) "
}
}
},
"network": {
"interfaces": {
"lo": {
"mtu": "65536",
"flags": [
"LOOPBACK",
"UP",
"LOWER_UP"
],
"encapsulation": "Loopback",
"addresses": {
"127.0.0.1": {
"family": "inet",
"prefixlen": "8",
"netmask": "255.0.0.0",
"scope": "Node"
},
"::1": {
"family": "inet6",
"prefixlen": "128",
"scope": "Node",
"tags": [
]
}
},
"state": "unknown"
},
"eth0": {
"type": "eth",
"number": "0",
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
"encapsulation": "Ethernet",
"addresses": {
"22:0B:67:D7:23:84": {
"family": "lladdr"
},
"138.197.106.113": {
"family": "inet",
"prefixlen": "20",
"netmask": "255.255.240.0",
"broadcast": "138.197.111.255",
"scope": "Global"
},
"10.17.0.7": {
"family": "inet",
"prefixlen": "16",
"netmask": "255.255.0.0",
"scope": "Global"
},
"fe80::200b:67ff:fed7:2384": {
"family": "inet6",
"prefixlen": "64",
"scope": "Link",
"tags": [
]
}
},
"state": "up",
"arp": {
"138.197.96.1": "00:00:5e:00:01:6e"
},
"routes": [
{
"destination": "default",
"family": "inet",
"via": "138.197.96.1"
},
{
"destination": "10.17.0.0/16",
"family": "inet",
"scope": "link",
"proto": "kernel",
"src": "10.17.0.7"
},
{
"destination": "138.197.96.0/20",
"family": "inet",
"scope": "link",
"proto": "kernel",
"src": "138.197.106.113"
},
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
},
"eth1": {
"type": "eth",
"number": "1",
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST"
],
"encapsulation": "Ethernet",
"addresses": {
"1A:2A:A2:A3:09:16": {
"family": "lladdr"
}
},
"state": "down"
},
"docker0": {
"type": "docker",
"number": "0",
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
"encapsulation": "Ethernet",
"addresses": {
"02:42:7A:D4:95:25": {
"family": "lladdr"
},
"172.17.0.1": {
"family": "inet",
"prefixlen": "16",
"netmask": "255.255.0.0",
"scope": "Global"
},
"fe80::42:7aff:fed4:9525": {
"family": "inet6",
"prefixlen": "64",
"scope": "Link",
"tags": [
]
}
},
"state": "up",
"arp": {
"172.17.0.2": "02:42:ac:11:00:02"
},
"routes": [
{
"destination": "172.17.0.0/16",
"family": "inet",
"scope": "link",
"proto": "kernel",
"src": "172.17.0.1"
},
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
},
"docker_gwbridge": {
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP"
],
"encapsulation": "Ethernet",
"addresses": {
"02:42:B4:16:BD:4B": {
"family": "lladdr"
},
"172.18.0.1": {
"family": "inet",
"prefixlen": "16",
"netmask": "255.255.0.0",
"scope": "Global"
}
},
"state": "down",
"routes": [
{
"destination": "172.18.0.0/16",
"family": "inet",
"scope": "link",
"proto": "kernel",
"src": "172.18.0.1"
}
]
},
"br-8c3ec6669e18": {
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
"encapsulation": "Ethernet",
"addresses": {
"02:42:C8:51:F8:98": {
"family": "lladdr"
},
"172.0.101.1": {
"family": "inet",
"prefixlen": "24",
"netmask": "255.255.255.0",
"scope": "Global"
},
"fe80::42:c8ff:fe51:f898": {
"family": "inet6",
"prefixlen": "64",
"scope": "Link",
"tags": [
]
}
},
"state": "up",
"arp": {
"172.0.101.12": "02:42:ac:00:65:0c",
"172.0.101.11": "02:42:ac:00:65:0b",
"172.0.101.10": "02:42:ac:00:65:0a",
"172.0.101.13": "02:42:ac:00:65:0d"
},
"routes": [
{
"destination": "172.0.101.0/24",
"family": "inet",
"scope": "link",
"proto": "kernel",
"src": "172.0.101.1"
},
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
},
"veth71e7a64": {
"type": "veth71e7a6",
"number": "4",
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
"encapsulation": "Ethernet",
"addresses": {
"6A:13:04:5D:AA:6E": {
"family": "lladdr"
},
"fe80::6813:4ff:fe5d:aa6e": {
"family": "inet6",
"prefixlen": "64",
"scope": "Link",
"tags": [
]
}
},
"state": "up",
"routes": [
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
},
"vethc311335": {
"type": "vethc31133",
"number": "5",
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
"encapsulation": "Ethernet",
"addresses": {
"32:29:DD:1D:F5:E0": {
"family": "lladdr"
},
"fe80::3029:ddff:fe1d:f5e0": {
"family": "inet6",
"prefixlen": "64",
"scope": "Link",
"tags": [
]
}
},
"state": "up",
"routes": [
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
},
"vethfc718df": {
"type": "vethfc71",
"number": "8df",
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
"encapsulation": "Ethernet",
"addresses": {
"6A:3C:4B:2E:BD:F8": {
"family": "lladdr"
},
"fe80::683c:4bff:fe2e:bdf8": {
"family": "inet6",
"prefixlen": "64",
"scope": "Link",
"tags": [
]
}
},
"state": "up",
"routes": [
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
},
"vethb0d962e": {
"type": "vethb0d96",
"number": "2e",
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"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
"encapsulation": "Ethernet",
"addresses": {
"CE:DC:5A:2A:BA:1F": {
"family": "lladdr"
},
"fe80::ccdc:5aff:fe2a:ba1f": {
"family": "inet6",
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"scope": "Link",
"tags": [
]
}
},
"state": "up",
"routes": [
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
},
"vetha536a6a": {
"type": "vetha536a",
"number": "6a",
"mtu": "1500",
"flags": [
"BROADCAST",
"MULTICAST",
"UP",
"LOWER_UP"
],
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"addresses": {
"B6:0B:FB:F8:2D:B7": {
"family": "lladdr"
},
"fe80::b40b:fbff:fef8:2db7": {
"family": "inet6",
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"scope": "Link",
"tags": [
]
}
},
"state": "up",
"routes": [
{
"destination": "fe80::/64",
"family": "inet6",
"metric": "256",
"proto": "kernel"
}
]
}
},
"default_interface": "eth0",
"default_gateway": "138.197.96.1"
},
"counters": {
"network": {
"interfaces": {
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"tx": {
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"bytes": "28772530",
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},
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}
},
"eth0": {
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},
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}
},
"eth1": {
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},
"rx": {
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}
},
"docker0": {
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},
"tx": {
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}
},
"docker_gwbridge": {
"rx": {
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"drop": "0",
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},
"tx": {
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}
},
"br-8c3ec6669e18": {
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},
"tx": {
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}
},
"veth71e7a64": {
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},
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}
},
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},
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}
},
"vethfc718df": {
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},
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}
},
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},
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}
},
"vetha536a6a": {
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},
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}
}
}
}
},
"ipaddress": "138.197.106.113",
"macaddress": "22:0B:67:D7:23:84",
"lsb": {
"id": "Ubuntu",
"release": "14.04",
"codename": "trusty",
"description": "Ubuntu 14.04.5 LTS"
},
"kernel": {
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"machine": "x86_64",
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
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},
"drm": {
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},
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"version": "0.2.3"
}
}
},
"os": "linux",
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"platform": "ubuntu",
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"idletime": "9 days 15 hours 38 minutes 49 seconds",
"virtualization": {
"systems": {
"kvm": "guest",
"docker": "guest"
},
"system": "docker",
"role": "guest"
},
"ohai_time": 1492057543.65496,
"hostname": "ws",
"machinename": "ws.codespaces.io",
"domain": null,
"dmi": {
},
"etc": {
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"shell": "/bin/bash",
"gecos": "root"
},
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},
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},
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"gecos": "sys"
},
"sync": {
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"gecos": "sync"
},
"games": {
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"uid": 5,
"shell": "/usr/sbin/nologin",
"gecos": "games"
},
"man": {
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"gecos": "man"
},
"lp": {
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"uid": 7,
"shell": "/usr/sbin/nologin",
"gecos": "lp"
},
"mail": {
"dir": "/var/mail",
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"shell": "/usr/sbin/nologin",
"gecos": "mail"
},
"news": {
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"shell": "/usr/sbin/nologin",
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]
},
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"errors=remount-ro",
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},
"/dev/vda1,/etc/hostname": {
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]
},
"/dev/vda1,/etc/hosts": {
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]
},
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]
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"noexec",
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]
},
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]
},
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]
},
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]
},
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]
},
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]
},
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]
},
"vda,": {
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},
"vda1,": {
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},
"vda15,": {
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}
}
},
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]
},
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]
},
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]
},
"proc": {
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"fs_type": "proc",
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"nodev",
"noexec",
"relatime"
]
},
"devpts": {
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"fs_type": "devpts",
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"rw",
"nosuid",
"noexec",
"relatime",
"gid=5",
"mode=620",
"ptmxmode=666"
]
},
"sysfs": {
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"fs_type": "sysfs",
"mount_options": [
"ro",
"nosuid",
"nodev",
"noexec",
"relatime"
]
},
"cgroup": {
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"fs_type": "cgroup",
"mount_options": [
"ro",
"nosuid",
"nodev",
"noexec",
"relatime",
"pids"
]
},
"systemd": {
"mount": "/sys/fs/cgroup/systemd",
"fs_type": "cgroup",
"mount_options": [
"ro",
"nosuid",
"nodev",
"noexec",
"relatime",
"name=systemd"
]
},
"mqueue": {
"mount": "/dev/mqueue",
"fs_type": "mqueue",
"mount_options": [
"rw",
"nosuid",
"nodev",
"noexec",
"relatime"
]
}
},
"init_package": "sh",
"command": {
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},
"packages": {
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"arch": "all"
},
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},
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},
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},
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},
"bash": {
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},
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"arch": "all"
},
"make": {
"version": "3.81-8.2ubuntu3",
"arch": "amd64"
},
"makedev": {
"version": "2.3.1-93ubuntu1",
"arch": "all"
},
"manpages": {
"version": "3.54-1ubuntu1",
"arch": "all"
},
"manpages-dev": {
"version": "3.54-1ubuntu1",
"arch": "all"
},
"mawk": {
"version": "1.3.3-17ubuntu2",
"arch": "amd64"
},
"mime-support": {
"version": "3.54ubuntu1.1",
"arch": "all"
},
"module-init-tools": {
"version": "15-0ubuntu6",
"arch": "all"
},
"mount": {
"version": "2.20.1-5.1ubuntu20.9",
"arch": "amd64"
},
"mountall": {
"version": "2.53",
"arch": "amd64"
},
"multiarch-support": {
"version": "2.19-0ubuntu6.9",
"arch": "amd64"
},
"ncurses-base": {
"version": "5.9+20140118-1ubuntu1",
"arch": "all"
},
"ncurses-bin": {
"version": "5.9+20140118-1ubuntu1",
"arch": "amd64"
},
"ncurses-term": {
"version": "5.9+20140118-1ubuntu1",
"arch": "all"
},
"net-tools": {
"version": "1.60-25ubuntu2.1",
"arch": "amd64"
},
"netbase": {
"version": "5.2",
"arch": "all"
},
"netcat-openbsd": {
"version": "1.105-7ubuntu1",
"arch": "amd64"
},
"nodejs": {
"version": "0.10.48-1nodesource1~trusty1",
"arch": "amd64"
},
"ntp": {
"version": "1:4.2.6.p5+dfsg-3ubuntu2.14.04.10",
"arch": "amd64"
},
"ntpdate": {
"version": "1:4.2.6.p5+dfsg-3ubuntu2.14.04.10",
"arch": "amd64"
},
"openssh-client": {
"version": "1:6.6p1-2ubuntu2.8",
"arch": "amd64"
},
"openssh-server": {
"version": "1:6.6p1-2ubuntu2.8",
"arch": "amd64"
},
"openssh-sftp-server": {
"version": "1:6.6p1-2ubuntu2.8",
"arch": "amd64"
},
"openssl": {
"version": "1.0.1f-1ubuntu2.22",
"arch": "amd64"
},
"passwd": {
"version": "1:4.1.5.1-1ubuntu9.2",
"arch": "amd64"
},
"patch": {
"version": "2.7.1-4ubuntu2.3",
"arch": "amd64"
},
"perl": {
"version": "5.18.2-2ubuntu1.1",
"arch": "amd64"
},
"perl-base": {
"version": "5.18.2-2ubuntu1.1",
"arch": "amd64"
},
"perl-modules": {
"version": "5.18.2-2ubuntu1.1",
"arch": "all"
},
"plymouth": {
"version": "0.8.8-0ubuntu17.1",
"arch": "amd64"
},
"procps": {
"version": "1:3.3.9-1ubuntu2.2",
"arch": "amd64"
},
"python": {
"version": "2.7.5-5ubuntu3",
"arch": "amd64"
},
"python-chardet": {
"version": "2.0.1-2build2",
"arch": "all"
},
"python-minimal": {
"version": "2.7.5-5ubuntu3",
"arch": "amd64"
},
"python-requests": {
"version": "2.2.1-1ubuntu0.3",
"arch": "all"
},
"python-six": {
"version": "1.5.2-1ubuntu1",
"arch": "all"
},
"python-urllib3": {
"version": "1.7.1-1ubuntu4",
"arch": "all"
},
"python2.7": {
"version": "2.7.6-8ubuntu0.3",
"arch": "amd64"
},
"python2.7-minimal": {
"version": "2.7.6-8ubuntu0.3",
"arch": "amd64"
},
"python3": {
"version": "3.4.0-0ubuntu2",
"arch": "amd64"
},
"python3-minimal": {
"version": "3.4.0-0ubuntu2",
"arch": "amd64"
},
"python3.4": {
"version": "3.4.3-1ubuntu1~14.04.5",
"arch": "amd64"
},
"python3.4-minimal": {
"version": "3.4.3-1ubuntu1~14.04.5",
"arch": "amd64"
},
"readline-common": {
"version": "6.3-4ubuntu2",
"arch": "all"
},
"resolvconf": {
"version": "1.69ubuntu1.1",
"arch": "all"
},
"rlwrap": {
"version": "0.37-5",
"arch": "amd64"
},
"rsync": {
"version": "3.1.0-2ubuntu0.2",
"arch": "amd64"
},
"rsyslog": {
"version": "7.4.4-1ubuntu2.6",
"arch": "amd64"
},
"sed": {
"version": "4.2.2-4ubuntu1",
"arch": "amd64"
},
"sensible-utils": {
"version": "0.0.9",
"arch": "all"
},
"sqlite3": {
"version": "3.8.2-1ubuntu2.1",
"arch": "amd64"
},
"sudo": {
"version": "1.8.9p5-1ubuntu1.3",
"arch": "amd64"
},
"sysv-rc": {
"version": "2.88dsf-41ubuntu6.3",
"arch": "all"
},
"sysvinit-utils": {
"version": "2.88dsf-41ubuntu6.3",
"arch": "amd64"
},
"tar": {
"version": "1.27.1-1ubuntu0.1",
"arch": "amd64"
},
"tcpd": {
"version": "7.6.q-25",
"arch": "amd64"
},
"tree": {
"version": "1.6.0-1",
"arch": "amd64"
},
"tzdata": {
"version": "2016j-0ubuntu0.14.04",
"arch": "all"
},
"ubuntu-keyring": {
"version": "2012.05.19",
"arch": "all"
},
"ubuntu-minimal": {
"version": "1.325",
"arch": "amd64"
},
"ucf": {
"version": "3.0027+nmu1",
"arch": "all"
},
"udev": {
"version": "204-5ubuntu20.20",
"arch": "amd64"
},
"unzip": {
"version": "6.0-9ubuntu1.5",
"arch": "amd64"
},
"upstart": {
"version": "1.12.1-0ubuntu4.2",
"arch": "amd64"
},
"ureadahead": {
"version": "0.100.0-16",
"arch": "amd64"
},
"util-linux": {
"version": "2.20.1-5.1ubuntu20.9",
"arch": "amd64"
},
"vim": {
"version": "2:7.4.052-1ubuntu3.1",
"arch": "amd64"
},
"vim-common": {
"version": "2:7.4.052-1ubuntu3.1",
"arch": "amd64"
},
"vim-runtime": {
"version": "2:7.4.052-1ubuntu3.1",
"arch": "all"
},
"vim-tiny": {
"version": "2:7.4.052-1ubuntu3.1",
"arch": "amd64"
},
"wget": {
"version": "1.15-1ubuntu1.14.04.2",
"arch": "amd64"
},
"whiptail": {
"version": "0.52.15-2ubuntu5",
"arch": "amd64"
},
"xauth": {
"version": "1:1.0.7-1ubuntu1",
"arch": "amd64"
},
"xkb-data": {
"version": "2.10.1-1ubuntu1",
"arch": "all"
},
"xz-utils": {
"version": "5.1.1alpha+20120614-2ubuntu2",
"arch": "amd64"
},
"zlib1g": {
"version": "1:1.2.8.dfsg-1ubuntu1",
"arch": "amd64"
}
},
"time": {
"timezone": "UTC"
},
"root_group": "root",
"keys": {
"ssh": {
"host_rsa_public": "AAAAB3NzaC1yc2EAAAADAQABAAABAQDR8yajG4rlZ0BZyynXNcsISwvhsjlPSopvG9RfY5PRG6SOsTUnijXG/qUIUNq1po4JgtiI/zq/GGGN2snWWUiDKYPglzn5b8u5NxoPgDPMuiFNylWogP2iK3clB3HEf/BXAoO+dpHhZ4t97bftSATMJ6L9Ur+uejscwcScMUTDqhOnSNy8TzwsFSPcIxRQg+1sTrrMpTKgH4mP532Qz6BUIZr6SljmCzwsgSf7129Lq3bsT8JfE4m9AdBDEAg/OMJMDeMvaz7m8TwOA99gtCexdSPbA5WXZBDsE5c4C15ZgvZJMjwVWga6CEwRS95H3qHd/kNXbsaNt0f45xEz3aW5",
"host_dsa_public": "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",
"host_ecdsa_public": "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBNSatcmevDaBtYFAMRTm8d8inXSD2hgRAxt9SnclH2LZCFBaZZvA9bX1yKkheor5ftRtWDs5W7RjqhVXQeqvJWo=",
"host_ecdsa_type": "ecdsa-sha2-nistp256",
"host_ed25519_public": "AAAAC3NzaC1lZDI1NTE5AAAAIBtP9YK9fascW5riKBL2iWxOeL1OZPWh6r4xCoS9dX6a"
}
},
"recipes": [
],
"expanded_run_list": [
],
"roles": [
]
}
}System Profiler
Installed with chef-client
system defined
ohai
ohai ipaddress
ohai hostname
ohai memory
ohai memory/total
ohai cpu/0/model_namesystem defined
Finding Information on the Node with ohai
node1
node1.json
attr
run_list
Chef Server
> knife
knife node show app1
knife node show app1 -l
knife node show app1 -a ipaddress
knife node show app1 -a ipaddress memory.total
knife node show app1 -a ipaddress memory.total
system defined
Finding Node Information from Workstation
ohai
ohai ipaddress
ohai hostname
ohai memory
ohai memory/total
ohai cpu/model_namenode['ipaddress']
node['hostname'] node['memory']['total']
node['cpu']['model_name']
system defined
attribute files
recipes
environments
roles
Attribute Files
Sane Defaults
Recipes
Roles
Env
Override Values
port = 80
user = tomcat
['tomcat']['user']
'tomcat'
=
default
attribute
value
precedence
user
defined
node['tomcat']['user']
node['ipaddress']
node['memory']['total']
Recipes
Templates
user
defined
system defined
template node['tomcat']['config'] do
source 'tomcat.conf.erb'
owner node['tomcat']['user']
group node['tomcat']['group']
mode '0644'
action :create
notifies :restart, "service[#{node['tomcat']['service']}]", :delayed
endUsing attribute in a Recipe
file: cookbooks/tomcat/attributes/default.rb
default['tomcat']['user'] = 'tomcat'
default['tomcat']['group'] = 'tomcat'
default['tomcat']['config'] = '/etc/tomcat/tomcat.conf'
default['tomcat']['packages'] = [ 'tomcat', 'tomcat-webapps' ]
default['tomcat']['service'] = 'tomcat'cd myapp
chef generate attribute cookbooks/tomcat defaultfile: cookbooks/tomcat/attributes/default.rb
default['tomcat']['user'] = 'tomcat'
default['tomcat']['group'] = 'tomcat'
default['tomcat']['config'] = '/etc/tomcat/tomcat.conf'
default['tomcat']['user_config'] = '/etc/tomcat/tomcat-users.xml'
default['tomcat']['packages'] = [ 'tomcat', 'tomcat-webapps' ]
default['tomcat']['service'] = 'tomcat'cd myapp
chef generate attribute cookbooks/tomcat defaulttomcat::config
cookbook_file node['tomcat']['config'] do
source 'tomcat.conf'
owner node['tomcat']['user']
group node['tomcat']['group']
mode '0644'
action :create
notifies :restart, "service[#{node['tomcat']['service']}]", :delayed
endpackage [ 'epel-release' ]
package node['tomcat']['packages']
service node['tomcat']['service'] do
action [ :start, :enable]
endtomcat::install
tomcat::service
lets convert base.rb recipe into a cookbook which can be applied to all linux nodes to perform common tasks.....
chef generate cookbook cookbooks/basecp /workspace/chapter3/base.rb cookbooks/base/recipes/default.rbGenerate base cookbook
Copy over existing recipe
knife node run_list add app1 "recipe[base]"knife cookbook upload base
[on node1]
sudo chef-clientAdd recipe to run list
Upload and apply
knife node run_list add app1 "recipe[base]"sudo chef-clientAdd default recipe from base to run list
Apply
note: change this
Failes because service "ntp" is not available on centos. It was created for ubuntu.
NTP
ubuntu
centos
package
service
ntp
ntp
ntp
ntpd
create attribute file for base cookbook
chef generate attribute cookbooks/base defaultcase node['platform_family']
when 'rhel'
default['ntp']['service'] = 'ntpd'
else
default['ntp']['service'] = 'ntp'
end
Attribute
file: cookbooks/base/attributes/default.rb
service node['ntp']['service'] do
action [ :start, :enable ]
endRecipe
file: cookbooks/base/recipes/default.rb
knife cookbook upload base
[On node1]
sudo chef-clientUpload cookbook and apply
server.dev.xml
server.stg.xml
server.prod.xml
memory = 128mb
port = 8081
memory = 4gb
port = 8888
memory = 16gb
port = 8080
dev
stage
prod
server.xml.erb
memory = <%= @memory %>
port = <%= @port %>
env
role
cookbook
server.xml
Contains text with dynamic ruby code
uses tags to mark dynamic code
<%=
%>
<%
%>
chef generate template cookbooks/base motdThis server is a property of <%= node['org']['name'] %>
SYSTEM INFO:
HOSTNAME : <%= node['hostname'] %>
IP ADDRESS : <%= node['ipaddress'] %>
MEMORY : <%= node['memory']['total'] %>default['org']['name'] = "XYZ Inc."file: cookbooks/base/templates/default/motd.erb
file: cookbooks/base/attributes/default.rb
template '/etc/motd' do
source 'motd.erb'
owner 'root'
group 'root'
mode 0644
endfile: cookbooks/base/recipes/default.rb
Replace file resource with template to manage /etc/motd
| default | |
|---|---|
| role | 4 |
| environment | 3 |
| recipe | 2 |
| attribute files | 1 |
dev
stage
prod
attrib file
env
8080
8081
8081
8080
8080
port =
8080
8081
8000
role
8000
['tomcat']['user']
'tomcat'
=
default
attribute
value
precedence
node.
user
defined
Lets define org name from recipes.
node.default['org']['name'] = "School of Devops"
file: cookbooks/base/recipes/default.rb
Templatize Tomcat Configs
Steps
By School of Devops
CCI 07 - Chef CI Attributes and Templates
