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SaltStack is an extremely fast and scalable systems and configuration management software for predictive orchestration, cloud and data center automation, server provisioning, application deployment and much more. Today we are going to quickstart with SaltStack to see how effective it is.
Let’s deep dive quick into SalStack environmental setup:
Machine Details:
| Machine | IP Address | Hostname |
| Salt Master | 208.64.250.8 | 208.64.250.8.uscolo.com |
| Salt Minion 1 | 208.64.250.6 | SVM61 |
| Salt Minion 2 | 208.64.250.7 | SVM71 |
Setting up Salt Master:
- Let’s see what OS is running on the system
| #cat /etc/issueCentOS release 6.5 (Final)
Kernel \r on an \m |
- Download EPEL repo as the pre-requisite:
| #wget http://ftp.riken.jp/Linux/fedora/epel/6/i386/epel-release-6-8.noarch.rpm–2015-01-31 15:19:07– http://ftp.riken.jp/Linux/fedora/epel/6/i386/epel-release-6-8.noarch.rpm
Resolving ftp.riken.jp… 134.160.38.1 Connecting to ftp.riken.jp|134.160.38.1|:80… connected. HTTP request sent, awaiting response… 200 OK Length: 14540 (14K) [text/plain] Saving to: “epel-release-6-8.noarch.rpm” 100%[======================================>] 14,540 54.6K/s in 0.3s 2015-01-31 15:19:08 (54.6 KB/s) – “epel-release-6-8.noarch.rpm” saved [14540/14540] |
- Install EPEL repo as shown below:
| #yum install epel-release-6-8.noarch.rpmLoaded plugins: fastestmirror, refresh-packagekit, security
base | 3.7 kB 00:00 base/primary_db | 4.6 MB 00:00 extras | 3.4 kB 00:00 extras/primary_db | 30 kB 00:00 updates | 3.4 kB 00:00 updates/primary_db | 2.1 MB 00:00 Setting up Install Process Examining epel-release-6-8.noarch.rpm: epel-release-6-8.noarch Marking epel-release-6-8.noarch.rpm to be installed Resolving Dependencies –> Running transaction check —> Package epel-release.noarch 0:6-8 will be installed |
- Install salt-master related packages in the master node. DONOT INSTALL MINION ON MASTER NODE.
| [root@208 ~]# yum install salt-masterLoaded plugins: fastestmirror, refresh-packagekit, security
Determining fastest mirrors epel/metalink | 13 kB 00:00 * base: centos.mirror.lstn.net * epel: mirror.prgmr.com * extras: mirror.hmc.edu * updates: ftp.osuosl.org epel | 4.4 kB 00:00 epel/primary_db | 6.3 MB 00:00 Setting up Install Process Resolving Dependencies –> Running transaction check —> Package salt-master.noarch 0:2014.7.0-3.el6 will be installed –> Processing Dependency: salt = 2014.7.0-3.el6 for package: salt-master-2014.7.0-3.el6.noarch –> Running transaction check —> Package salt.noarch 0:2014.7.0-3.el6 will be installed –> Processing Dependency: sshpass for package: salt-2014.7.0-3.el6.noarch –> Processing Dependency: python-zmq for package: salt-2014.7.0-3.el6.noarch –> Processing Dependency: python-requests for package: salt-2014.7.0-3.el6.noarch –> Processing Dependency: python-msgpack for package: salt-2014.7.0-3.el6.noarch –> Processing Dependency: python-jinja2 for package: salt-2014.7.0-3.el6.noarch –> Processing Dependency: m2crypto for package: salt-2014.7.0-3.el6.noarch –> Processing Dependency: PyYAML for package: salt-2014.7.0-3.el6.noarch –> Running transaction check —> Package PyYAML.x86_64 0:3.10-3.1.el6 will be installed –> Processing Dependency: libyaml-0.so.2()(64bit) for package: PyYAML-3.10-3.1.el6.x86_64 —> Package m2crypto.x86_64 0:0.20.2-9.el6 will be installed —> Package python-jinja2.x86_64 0:2.2.1-2.el6_5 will be installed –> Processing Dependency: python-babel >= 0.8 for package: python-jinja2-2.2.1-2.el6_5.x86_64 —> Package python-msgpack.x86_64 0:0.1.13-3.el6 will be installed —> Package python-requests.noarch 0:1.1.0-4.el6.centos will be installed –> Processing Dependency: python-urllib3 for package: python-requests-1.1.0-4.el6.centos.noarch –> Processing Dependency: python-ordereddict for package: python-requests-1.1.0-4.el6.centos.noarch –> Processing Dependency: python-chardet for package: python-requests-1.1.0-4.el6.centos.noarch —> Package python-zmq.x86_64 0:14.3.1-1.el6 will be installed –> Processing Dependency: libzmq.so.3()(64bit) for package: python-zmq-14.3.1-1.el6.x86_64 —> Package sshpass.x86_64 0:1.05-1.el6 will be installed –> Running transaction check —> Package libyaml.x86_64 0:0.1.3-4.el6_6 will be installed —> Package python-babel.noarch 0:0.9.4-5.1.el6 will be installed —> Package python-chardet.noarch 0:2.0.1-1.el6.centos will be installed —> Package python-ordereddict.noarch 0:1.1-2.el6.centos will be installed —> Package python-urllib3.noarch 0:1.5-7.el6.centos will be installed –> Processing Dependency: python-six for package: python-urllib3-1.5-7.el6.centos.noarch –> Processing Dependency: python-backports-ssl_match_hostname for package: python-urllib3-1.5-7.el6.centos.noarch —> Package zeromq3.x86_64 0:3.2.4-1.el6 will be installed –> Processing Dependency: libpgm-5.1.so.0()(64bit) for package: zeromq3-3.2.4-1.el6.x86_64 –> Running transaction check —> Package openpgm.x86_64 0:5.1.118-3.el6 will be installed —> Package python-backports-ssl_match_hostname.noarch 0:3.4.0.2-4.el6.centos will be installed –> Processing Dependency: python-backports for package: python-backports-ssl_match_hostname-3.4.0.2-4.el6.centos.noarch —> Package python-six.noarch 0:1.7.3-1.el6.centos will be installed –> Running transaction check —> Package python-backports.x86_64 0:1.0-3.el6.centos will be installed –> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: salt-master noarch 2014.7.0-3.el6 epel 33 k Installing for dependencies: PyYAML x86_64 3.10-3.1.el6 updates 157 k libyaml x86_64 0.1.3-4.el6_6 updates 52 k m2crypto x86_64 0.20.2-9.el6 base 471 k openpgm x86_64 5.1.118-3.el6 epel 165 k python-babel noarch 0.9.4-5.1.el6 base 1.4 M python-backports x86_64 1.0-3.el6.centos extras 5.3 k python-backports-ssl_match_hostname noarch 3.4.0.2-4.el6.centos extras 13 k python-chardet noarch 2.0.1-1.el6.centos extras 225 k python-jinja2 x86_64 2.2.1-2.el6_5 base 466 k python-msgpack x86_64 0.1.13-3.el6 epel 29 k python-ordereddict noarch 1.1-2.el6.centos extras 7.7 k python-requests noarch 1.1.0-4.el6.centos extras 71 k python-six noarch 1.7.3-1.el6.centos extras 27 k python-urllib3 noarch 1.5-7.el6.centos extras 41 k python-zmq x86_64 14.3.1-1.el6 epel 467 k salt noarch 2014.7.0-3.el6 epel 3.7 M sshpass x86_64 1.05-1.el6 epel 19 k zeromq3 x86_64 3.2.4-1.el6 epel 334 k Transaction Summary ================================================================================ Install 19 Package(s) Total download size: 7.7 M Installed size: 29 M Is this ok [y/N]: y Downloading Packages: (1/19): PyYAML-3.10-3.1.el6.x86_64.rpm | 157 kB 00:00 (2/19): libyaml-0.1.3-4.el6_6.x86_64.rpm | 52 kB 00:00 (3/19): m2crypto-0.20.2-9.el6.x86_64.rpm | 471 kB 00:00 (4/19): openpgm-5.1.118-3.el6.x86_64.rpm | 165 kB 00:00 (5/19): python-babel-0.9.4-5.1.el6.noarch.rpm | 1.4 MB 00:00 (6/19): python-backports-1.0-3.el6.centos.x86_64.rpm | 5.3 kB 00:00 (7/19): python-backports-ssl_match_hostname-3.4.0.2-4.el | 13 kB 00:00 (8/19): python-chardet-2.0.1-1.el6.centos.noarch.rpm | 225 kB 00:00 (9/19): python-jinja2-2.2.1-2.el6_5.x86_64.rpm | 466 kB 00:00 (10/19): python-msgpack-0.1.13-3.el6.x86_64.rpm | 29 kB 00:00 (11/19): python-ordereddict-1.1-2.el6.centos.noarch.rpm | 7.7 kB 00:00 (12/19): python-requests-1.1.0-4.el6.centos.noarch.rpm | 71 kB 00:00 (13/19): python-six-1.7.3-1.el6.centos.noarch.rpm | 27 kB 00:00 (14/19): python-urllib3-1.5-7.el6.centos.noarch.rpm | 41 kB 00:00 (15/19): python-zmq-14.3.1-1.el6.x86_64.rpm | 467 kB 00:00 (16/19): salt-2014.7.0-3.el6.noarch.rpm | 3.7 MB 00:00 (17/19): salt-master-2014.7.0-3.el6.noarch.rpm | 33 kB 00:00 (18/19): sshpass-1.05-1.el6.x86_64.rpm | 19 kB 00:00 (19/19): zeromq3-3.2.4-1.el6.x86_64.rpm | 334 kB 00:00 ——————————————————————————– Total 4.3 MB/s | 7.7 MB 00:01 warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 Importing GPG key 0x0608B895: Userid : EPEL (6) <epel@fedoraproject.org> Package: epel-release-6-8.noarch (@/epel-release-6-8.noarch) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 Is this ok [y/N]: y warning: rpmts_HdrFromFdno: Header V3 RSA/SHA256 Signature, key ID c105b9de: NOKEY Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 Importing GPG key 0xC105B9DE: Userid : CentOS-6 Key (CentOS 6 Official Signing Key) <centos-6-key@centos.org> Package: centos-release-6-5.el6.centos.11.1.x86_64 (@anaconda-CentOS-201311272149.x86_64/6.5) From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6 Is this ok [y/N]: y Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : python-ordereddict-1.1-2.el6.centos.noarch 1/19 Installing : python-six-1.7.3-1.el6.centos.noarch 2/19 Installing : sshpass-1.05-1.el6.x86_64 3/19 Installing : python-backports-1.0-3.el6.centos.x86_64 4/19 Installing : python-backports-ssl_match_hostname-3.4.0.2-4.el6.centos 5/19 Installing : python-urllib3-1.5-7.el6.centos.noarch 6/19 Installing : m2crypto-0.20.2-9.el6.x86_64 7/19 Installing : libyaml-0.1.3-4.el6_6.x86_64 8/19 Installing : PyYAML-3.10-3.1.el6.x86_64 9/19 Installing : python-chardet-2.0.1-1.el6.centos.noarch 10/19 Installing : python-requests-1.1.0-4.el6.centos.noarch 11/19 Installing : python-babel-0.9.4-5.1.el6.noarch 12/19 Installing : python-jinja2-2.2.1-2.el6_5.x86_64 13/19 Installing : python-msgpack-0.1.13-3.el6.x86_64 14/19 Installing : openpgm-5.1.118-3.el6.x86_64 15/19 Installing : zeromq3-3.2.4-1.el6.x86_64 16/19 Installing : python-zmq-14.3.1-1.el6.x86_64 17/19 Installing : salt-2014.7.0-3.el6.noarch 18/19 Installing : salt-master-2014.7.0-3.el6.noarch 19/19 Verifying : openpgm-5.1.118-3.el6.x86_64 1/19 Verifying : python-msgpack-0.1.13-3.el6.x86_64 2/19 Verifying : python-babel-0.9.4-5.1.el6.noarch 3/19 Verifying : python-chardet-2.0.1-1.el6.centos.noarch 4/19 Verifying : python-backports-ssl_match_hostname-3.4.0.2-4.el6.centos 5/19 Verifying : PyYAML-3.10-3.1.el6.x86_64 6/19 Verifying : libyaml-0.1.3-4.el6_6.x86_64 7/19 Verifying : python-ordereddict-1.1-2.el6.centos.noarch 8/19 Verifying : python-urllib3-1.5-7.el6.centos.noarch 9/19 Verifying : m2crypto-0.20.2-9.el6.x86_64 10/19 Verifying : salt-2014.7.0-3.el6.noarch 11/19 Verifying : python-zmq-14.3.1-1.el6.x86_64 12/19 Verifying : python-jinja2-2.2.1-2.el6_5.x86_64 13/19 Verifying : salt-master-2014.7.0-3.el6.noarch 14/19 Verifying : python-backports-1.0-3.el6.centos.x86_64 15/19 Verifying : zeromq3-3.2.4-1.el6.x86_64 16/19 Verifying : python-requests-1.1.0-4.el6.centos.noarch 17/19 Verifying : sshpass-1.05-1.el6.x86_64 18/19 Verifying : python-six-1.7.3-1.el6.centos.noarch 19/19 Installed: salt-master.noarch 0:2014.7.0-3.el6 Dependency Installed: PyYAML.x86_64 0:3.10-3.1.el6 libyaml.x86_64 0:0.1.3-4.el6_6 m2crypto.x86_64 0:0.20.2-9.el6 openpgm.x86_64 0:5.1.118-3.el6 python-babel.noarch 0:0.9.4-5.1.el6 python-backports.x86_64 0:1.0-3.el6.centos python-backports-ssl_match_hostname.noarch 0:3.4.0.2-4.el6.centos python-chardet.noarch 0:2.0.1-1.el6.centos python-jinja2.x86_64 0:2.2.1-2.el6_5 python-msgpack.x86_64 0:0.1.13-3.el6 python-ordereddict.noarch 0:1.1-2.el6.centos python-requests.noarch 0:1.1.0-4.el6.centos python-six.noarch 0:1.7.3-1.el6.centos python-urllib3.noarch 0:1.5-7.el6.centos python-zmq.x86_64 0:14.3.1-1.el6 salt.noarch 0:2014.7.0-3.el6 sshpass.x86_64 0:1.05-1.el6 zeromq3.x86_64 0:3.2.4-1.el6 Complete! [root@208 ~]# yum install salt-ssh Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile * base: centos.mirror.lstn.net * epel: mirror.prgmr.com * extras: mirror.hmc.edu * updates: ftp.osuosl.org Setting up Install Process Resolving Dependencies –> Running transaction check —> Package salt-ssh.noarch 0:2014.7.0-3.el6 will be installed –> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: salt-ssh noarch 2014.7.0-3.el6 epel 12 k Transaction Summary ================================================================================ Install 1 Package(s) Total download size: 12 k Installed size: 2.8 k Is this ok [y/N]: y Downloading Packages: salt-ssh-2014.7.0-3.el6.noarch.rpm | 12 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : salt-ssh-2014.7.0-3.el6.noarch 1/1 Verifying : salt-ssh-2014.7.0-3.el6.noarch 1/1 Installed: salt-ssh.noarch 0:2014.7.0-3.el6 Complete! [root@208 ~]# yum install salt-api Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile * base: centos.mirror.lstn.net * epel: mirror.prgmr.com * extras: mirror.hmc.edu * updates: ftp.osuosl.org Setting up Install Process Resolving Dependencies –> Running transaction check —> Package salt-api.noarch 0:2014.7.0-3.el6 will be installed –> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: salt-api noarch 2014.7.0-3.el6 epel 12 k Transaction Summary ================================================================================ Install 1 Package(s) Total download size: 12 k Installed size: 4.1 k Is this ok [y/N]: y Downloading Packages: salt-api-2014.7.0-3.el6.noarch.rpm | 12 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : salt-api-2014.7.0-3.el6.noarch 1/1 Verifying : salt-api-2014.7.0-3.el6.noarch 1/1 Installed: salt-api.noarch 0:2014.7.0-3.el6 Complete! |
Configuring SALT MASTER FILE:
| #egrep -v “^#|^$” /etc/salt/masterinterface: 208.64.250.8
publish_port: 4505 user: root ret_port: 4506 pidfile: /var/run/salt-master.pid pki_dir: /etc/salt/pki/master sock_dir: /var/run/salt/master minion_data_cache: True autosign_file: /etc/salt/autosign.conf |
- Now restart the salt-master service:
#service salt-master restart
CONFIGURING SALT-MINION (Client Node)
- Assume that a different machine running CentOS 6.5 is present.
- Follow the same steps which is followed for pre-requisite for master except salt-master package. You need to install salt-minion through YUM.
- Configure the /etc/salt/minion file as shown below:
master: 208.64.250.8
master_port: 4506
- Restart the salt-minion service:
| service salt-minion restartStopping salt-minion daemon: [FAILED]
Starting salt-minion daemon: [ OK ] |
- Run the following command to configure authentication keys in between master and client:
| [root@208 ~]# salt-key -L
Accepted Keys: Unaccepted Keys: Rejected Keys: [root@208 ~]# salt-key -A The key glob ‘*’ does not match any unaccepted keys. [root@208 ~]# service iptables stop iptables: Setting chains to policy ACCEPT: filter [ OK ] iptables: Flushing firewall rules: [ OK ] iptables: Unloading modules: [ OK ] [root@208 ~]# salt-key -L Accepted Keys: Unaccepted Keys: SVM61 Rejected Keys: [root@208 ~]# salt-key -A The following keys are going to be accepted: Unaccepted Keys: SVM61 Proceed? [n/Y] Y Key for minion SVM61 accepted. [root@208 ~]# |
Verifying master and minion functionality test:
Run the below command on the salt master:
| salt ‘*’ test.ping -vExecuting job with jid 20150131181518540377
——————————————- SVM61: True [root@208 salt]# salt ‘*’ test.ping SVM61: True [root@208 salt]# salt ‘*’ disk.usage SVM61: ———- /: ———- 1K-blocks: 8780808 available: 6021132 capacity: 28% filesystem: /dev/mapper/vg_svm1-lv_root used: 2313624 /boot: ———- 1K-blocks: 495844 available: 436779 capacity: 8% filesystem: /dev/sda1 used: 33465 /dev/shm: ———- 1K-blocks: 251000 available: 251000 capacity: 0% filesystem: tmpfs used: 0 |
Troubleshooting Tips:
- Suppose you face any issue related to keys, then first thing to check is minion logs which can be tailed at /var/log/salt/minion.
- If you encounter the following error message:
The master may need to be updated if it is a version of Salt lower than 2014.7.0, or If you are confident that you are connecting to a valid Salt Master, then remove the master public key and restart the Salt Minion.The master public key can be found at: /etc/salt/pki/minion/minion_master.pub
Fix: remove the key on minion and master and then restart the minion service. You can remove the key from master through salt-key –delete-all and then start from start.
Preparing the first salt Formulae:
Salt formulae are simple YAML text files and by default reside on the salt master.
You can put all your salt formulae under /srv/salt folder.
Example: Let’s see how can you install Subversion on the remote minion from salt master.
Add the following text in subversion.sls:
| cat /srv/salt/subversion.slssubversion:
pkg: – installed [root@208 salt]# |
What does the above code means?
The first line is called the ID Declaration; essentially the “label” for this stanza. subversion will be used for our package name. The name you use here must match up with the actual package name used by your package manager. (In reality, the ID Declaration can be any arbitrary text and you can specify the actual package name below, but we’ll do it this way right now for simplicity’s sake).
The second line is called the State Declaration. This refers to the specific Salt State that we’re going to make use of. In this example we’re using the “pkg” state.
Now run the following command to install subversion on the minion machine in a single shot:
| salt ‘SVM61’ state.sls subversionSVM61:
———- ID: subversion Function: pkg.installed Result: True Comment: The following packages were installed/updated: subversion. Started: 18:51:48.459666 Duration: 52120.684 ms Changes: ———- apr: ———- new: 1.3.9-5.el6_2 old: apr-util: ———- new: 1.3.9-3.el6_0.1 old: neon: ———- new: 0.29.3-3.el6_4 old: pakchois: ———- new: 0.4-3.2.el6 old: perl-URI: ———- new: 1.40-2.el6 old: subversion: ———- new: 1.6.11-10.el6_5 old: Summary ———— Succeeded: 1 (changed=1) Failed: 0 ———— Total states run: 1 [root@208 ~]# |
Did you see that? Subversion gets installed successfully. Verify it on minion machine:
| [root@SVM61 ~]# rpm -qa subversionsubversion-1.6.11-10.el6_5.x86_64
[root@SVM61 ~]# |
Setting up Minion 2:
- Follow the same step which you followed during the minion ( SVM61)
- Install salt-minion(and NOT SALT MASTER) specific package.
- Once you configure the following entry in /etc/salt/minion:
| [root@SVM71 ~]# egrep -v “^#|^$” /etc/salt/minionmaster: 208.64.250.8
master_port: 4506 user: root pidfile: /var/run/salt-minion.pid pki_dir: /etc/salt/pki/minion id: SVM71 [root@SVM71 ~]# |
- Restart the salt-minion service.
- Once restarted, you will find the following output. Accept the key and you are ready to test the ping test.
| [root@208 ~]# salt-key -LAccepted Keys:
SVM61 Unaccepted Keys: SVM71 Rejected Keys: [root@208 ~]# salt-key -A The following keys are going to be accepted: Unaccepted Keys: SVM71 Proceed? [n/Y] Y Key for minion SVM71 accepted. [root@208 ~]# salt-key -L Accepted Keys: SVM61 SVM71 Unaccepted Keys: Rejected Keys: [root@208 ~]# |
- Let’s check the ping test from minion 2 system:
| salt SVM71 test.pingSVM71:
True [root@208 ~]# salt ‘*’ test.ping SVM71: True SVM61: True [root@208 ~]# |
Hence our 2 minions and 1 master are readily configured.
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